--- a/browser/base/content/test/sanitize/browser_sanitize-timespans.js
+++ b/browser/base/content/test/sanitize/browser_sanitize-timespans.js
@@ -1,10 +1,13 @@
 requestLongerTimeout(2);
 
+const {PlacesTestUtils} =
+  ChromeUtils.import("resource://testing-common/PlacesTestUtils.jsm", {});
+
 // Bug 453440 - Test the timespan-based logic of the sanitizer code
 var now_mSec = Date.now();
 var now_uSec = now_mSec * 1000;
 
 const kMsecPerMin = 60 * 1000;
 const kUsecPerMin = 60 * 1000000;
 
 function promiseFormHistoryRemoved() {
@@ -421,56 +424,47 @@ async function onHistoryReady() {
   ok(!(await PlacesUtils.history.hasVisits("http://before-today.com")),
      "Pretend visit to before-today.com should now be deleted");
 
   await countEntries("b4today", "b4today form entry should be deleted", checkZero);
 
   ok(!(await downloadExists(publicList, "fakefile-old")), "Year old download should now be deleted");
 }
 
-function setupHistory() {
-  return new Promise(resolve => {
+async function setupHistory() {
 
-    let places = [];
+  let places = [];
 
-    function addPlace(aURI, aTitle, aVisitDate) {
-      places.push({
-        uri: aURI,
-        title: aTitle,
-        visits: [{
-          visitDate: aVisitDate,
-          transitionType: Ci.nsINavHistoryService.TRANSITION_LINK
-        }]
-      });
-    }
+  function addPlace(aURI, aTitle, aVisitDate) {
+    places.push({
+      uri: aURI,
+      title: aTitle,
+      visitDate: aVisitDate,
+      transition: Ci.nsINavHistoryService.TRANSITION_LINK
+    });
+  }
 
-    addPlace(makeURI("http://10minutes.com/"), "10 minutes ago", now_uSec - 10 * kUsecPerMin);
-    addPlace(makeURI("http://1hour.com/"), "Less than 1 hour ago", now_uSec - 45 * kUsecPerMin);
-    addPlace(makeURI("http://1hour10minutes.com/"), "1 hour 10 minutes ago", now_uSec - 70 * kUsecPerMin);
-    addPlace(makeURI("http://2hour.com/"), "Less than 2 hours ago", now_uSec - 90 * kUsecPerMin);
-    addPlace(makeURI("http://2hour10minutes.com/"), "2 hours 10 minutes ago", now_uSec - 130 * kUsecPerMin);
-    addPlace(makeURI("http://4hour.com/"), "Less than 4 hours ago", now_uSec - 180 * kUsecPerMin);
-    addPlace(makeURI("http://4hour10minutes.com/"), "4 hours 10 minutesago", now_uSec - 250 * kUsecPerMin);
+  addPlace("http://10minutes.com/", "10 minutes ago", now_uSec - 10 * kUsecPerMin);
+  addPlace("http://1hour.com/", "Less than 1 hour ago", now_uSec - 45 * kUsecPerMin);
+  addPlace("http://1hour10minutes.com/", "1 hour 10 minutes ago", now_uSec - 70 * kUsecPerMin);
+  addPlace("http://2hour.com/", "Less than 2 hours ago", now_uSec - 90 * kUsecPerMin);
+  addPlace("http://2hour10minutes.com/", "2 hours 10 minutes ago", now_uSec - 130 * kUsecPerMin);
+  addPlace("http://4hour.com/", "Less than 4 hours ago", now_uSec - 180 * kUsecPerMin);
+  addPlace("http://4hour10minutes.com/", "4 hours 10 minutesago", now_uSec - 250 * kUsecPerMin);
 
-    let today = new Date();
-    today.setHours(0);
-    today.setMinutes(0);
-    today.setSeconds(1);
-    addPlace(makeURI("http://today.com/"), "Today", today.getTime() * 1000);
+  let today = new Date();
+  today.setHours(0);
+  today.setMinutes(0);
+  today.setSeconds(1);
+  addPlace("http://today.com/", "Today", today.getTime() * 1000);
 
-    let lastYear = new Date();
-    lastYear.setFullYear(lastYear.getFullYear() - 1);
-    addPlace(makeURI("http://before-today.com/"), "Before Today", lastYear.getTime() * 1000);
-    PlacesUtils.asyncHistory.updatePlaces(places, {
-      handleError: () => ok(false, "Unexpected error in adding visit."),
-      handleResult: () => { },
-      handleCompletion: () => resolve()
-    });
-
-  });
+  let lastYear = new Date();
+  lastYear.setFullYear(lastYear.getFullYear() - 1);
+  addPlace("http://before-today.com/", "Before Today", lastYear.getTime() * 1000);
+  await PlacesTestUtils.addVisits(places);
 }
 
 async function setupFormHistory() {
 
   function searchEntries(terms, params) {
     return new Promise((resolve, reject) => {
 
       let results = [];

--- a/browser/components/places/tests/browser/browser_library_downloads.js
+++ b/browser/components/places/tests/browser/browser_library_downloads.js
@@ -5,64 +5,47 @@
 /*
  * Tests bug 564900: Add folder specifically for downloads to Library left pane.
  * https://bugzilla.mozilla.org/show_bug.cgi?id=564900
  * This test visits various pages then opens the Library and ensures
  * that both the Downloads folder shows up and that the correct visits
  * are shown in it.
  */
 
-var now = Date.now();
+add_task(async function test() {
+  // Add visits.
+  await PlacesTestUtils.addVisits([{
+    uri: "http://mozilla.org",
+    transition: PlacesUtils.history.TRANSITION_TYPED
+  }, {
+    uri: "http://google.com",
+    transition: PlacesUtils.history.TRANSITION_DOWNLOAD
+  }, {
+    uri: "http://en.wikipedia.org",
+    transition: PlacesUtils.history.TRANSITION_TYPED
+  }, {
+    uri: "http://ubuntu.org",
+    transition: PlacesUtils.history.TRANSITION_DOWNLOAD
+  }]);
 
-function test() {
-  waitForExplicitFinish();
+  let library = await promiseLibrary("Downloads");
 
-  let onLibraryReady = function(win) {
-    // Add visits to compare contents with.
-    let places = [
-      { uri: NetUtil.newURI("http://mozilla.com"),
-        visits: [ new VisitInfo(PlacesUtils.history.TRANSITION_TYPED) ]
-      },
-      { uri: NetUtil.newURI("http://google.com"),
-        visits: [ new VisitInfo(PlacesUtils.history.TRANSITION_DOWNLOAD) ]
-      },
-      { uri: NetUtil.newURI("http://en.wikipedia.org"),
-        visits: [ new VisitInfo(PlacesUtils.history.TRANSITION_TYPED) ]
-      },
-      { uri: NetUtil.newURI("http://ubuntu.org"),
-        visits: [ new VisitInfo(PlacesUtils.history.TRANSITION_DOWNLOAD) ]
-      },
-    ];
-    PlacesUtils.asyncHistory.updatePlaces(places, {
-      handleResult() {},
-      handleError() {
-        ok(false, "gHistory.updatePlaces() failed");
-      },
-      handleCompletion() {
-        // Make sure Downloads is present.
-        isnot(win.PlacesOrganizer._places.selectedNode, null,
-              "Downloads is present and selected");
+  registerCleanupFunction(async () => {
+    await library.close();
+    await PlacesUtils.history.clear();
+  });
+
+  // Make sure Downloads is present.
+  Assert.notEqual(library.PlacesOrganizer._places.selectedNode, null,
+    "Downloads is present and selected");
 
+  // Check results.
+  let testURIs = ["http://ubuntu.org/", "http://google.com/"];
 
-        // Check results.
-        let testURIs = ["http://ubuntu.org/", "http://google.com/"];
-        for (let element of win.ContentArea.currentView
-                                           .associatedElement.children) {
-          is(element._shell.download.source.url, testURIs.shift(),
-             "URI matches");
-        }
+  await BrowserTestUtils.waitForCondition(() =>
+    library.ContentArea.currentView.associatedElement.children.length == testURIs.length);
 
-        win.close();
-        PlacesUtils.history.clear().then(finish);
-      }
-    });
-  };
-
-  openLibrary(onLibraryReady, "Downloads");
-}
-
-function VisitInfo(aTransitionType) {
-  this.transitionType =
-    aTransitionType === undefined ?
-      PlacesUtils.history.TRANSITION_LINK : aTransitionType;
-  this.visitDate = now++ * 1000;
-}
-VisitInfo.prototype = {};
+  for (let element of library.ContentArea.currentView
+                                          .associatedElement.children) {
+    Assert.equal(element._shell.download.source.url, testURIs.shift(),
+      "URI matches");
+  }
+});

--- a/browser/components/preferences/in-content/main.js
+++ b/browser/components/preferences/in-content/main.js
@@ -532,18 +532,21 @@ var gMainPane = {
 
     setEventListener("filter", "command", gMainPane.filter);
     setEventListener("handlersView", "select",
       gMainPane.onSelectionChanged);
     setEventListener("typeColumn", "click", gMainPane.sort);
     setEventListener("actionColumn", "click", gMainPane.sort);
     setEventListener("chooseFolder", "command", gMainPane.chooseFolder);
     setEventListener("saveWhere", "command", gMainPane.handleSaveToCommand);
+    Preferences.get("browser.download.folderList").on("change",
+      gMainPane.displayDownloadDirPref.bind(gMainPane));
     Preferences.get("browser.download.dir").on("change",
       gMainPane.displayDownloadDirPref.bind(gMainPane));
+    gMainPane.displayDownloadDirPref();
 
     // Listen for window unload so we can remove our preference observers.
     window.addEventListener("unload", this);
 
     // Figure out how we should be sorting the list.  We persist sort settings
     // across sessions, so we can't assume the default sort column/direction.
     // XXX should we be using the XUL sort service instead?
     if (document.getElementById("actionColumn").hasAttribute("sortDirection")) {
@@ -2468,37 +2471,28 @@ var gMainPane = {
       // displaying blank downloadFolder label and icon on load of preferences UI
       // Set folderIndex to 1 if currentDirPref is unspecified
       folderIndex = currentDirPref.value ? await this._folderToIndex(currentDirPref.value) : 1;
     }
 
     // Display a 'pretty' label or the path in the UI.
     if (folderIndex == 2) {
       // Custom path selected and is configured
-      downloadFolder.label = this._getDisplayNameOfFile(currentDirPref.value);
+      downloadFolder.value = currentDirPref.value ? currentDirPref.value.path : "";
       iconUrlSpec = fph.getURLSpecFromFile(currentDirPref.value);
     } else if (folderIndex == 1) {
       // 'Downloads'
-      downloadFolder.label = bundlePreferences.getString("downloadsFolderName");
+      downloadFolder.value = bundlePreferences.getString("downloadsFolderName");
       iconUrlSpec = fph.getURLSpecFromFile(await this._indexToFolder(1));
     } else {
       // 'Desktop'
-      downloadFolder.label = bundlePreferences.getString("desktopFolderName");
+      downloadFolder.value = bundlePreferences.getString("desktopFolderName");
       iconUrlSpec = fph.getURLSpecFromFile(await this._getDownloadsFolder("Desktop"));
     }
-    downloadFolder.image = "moz-icon://" + iconUrlSpec + "?size=16";
-  },
-
-  /**
-   * Returns the textual path of a folder in readable form.
-   */
-  _getDisplayNameOfFile(aFolder) {
-    // TODO: would like to add support for 'Downloads on Macintosh HD'
-    //       for OS X users.
-    return aFolder ? aFolder.path : "";
+    downloadFolder.style.backgroundImage = "url(moz-icon://" + iconUrlSpec + "?size=16)";
   },
 
   /**
    * Returns the Downloads folder.  If aFolder is "Desktop", then the Downloads
    * folder returned is the desktop folder; otherwise, it is a folder whose name
    * indicates that it is a download folder and whose path is as determined by
    * the XPCOM directory service via the download manager's attribute
    * defaultDownloadsDirectory.

--- a/browser/components/preferences/in-content/main.xul
+++ b/browser/components/preferences/in-content/main.xul
@@ -348,38 +348,34 @@
 
 <!--Downloads-->
 <groupbox id="downloadsGroup" data-category="paneGeneral" hidden="true">
   <caption><label data-l10n-id="download-header"/></caption>
 
   <radiogroup id="saveWhere"
               preference="browser.download.useDownloadDir"
               onsyncfrompreference="return gMainPane.readUseDownloadDir();">
-    <hbox id="saveToRow">
+    <hbox>
       <radio id="saveTo"
-            value="true"
-            data-l10n-id="download-save-to"
-            aria-labelledby="saveTo downloadFolder"/>
-      <filefield id="downloadFolder"
-                flex="1"
-                preference="browser.download.folderList"
-                preference-editable="true"
-                aria-labelledby="saveTo"
-                onsyncfrompreference="return gMainPane.displayDownloadDirPref();"/>
+             value="true"
+             data-l10n-id="download-save-to"/>
+      <textbox id="downloadFolder" flex="1"
+               readonly="true"
+               aria-labelledby="saveTo"/>
       <button id="chooseFolder"
-              data-l10n-id="download-choose-folder"
-      />
+              class="accessory-button"
+              data-l10n-id="download-choose-folder"/>
     </hbox>
     <!-- Additional radio button added to support CloudStorage - Bug 1357171 -->
     <radio id="saveToCloud"
-          value="true"
-          hidden="true"/>
+           value="true"
+           hidden="true"/>
     <radio id="alwaysAsk"
-          value="false"
-          data-l10n-id="download-always-ask-where"/>
+           value="false"
+           data-l10n-id="download-always-ask-where"/>
   </radiogroup>
 </groupbox>
 
 <groupbox id="applicationsGroup" data-category="paneGeneral" hidden="true">
   <caption><label data-l10n-id="applications-header"/></caption>
   <description data-l10n-id="applications-description"/>
   <textbox id="filter" flex="1"
            type="search"

--- a/browser/themes/linux/customizableui/panelUI.css
+++ b/browser/themes/linux/customizableui/panelUI.css
@@ -17,32 +17,16 @@
 #BMB_bookmarksPopup menupopup > hbox > .popup-internal-box > .arrowscrollbox-scrollbox > .scrollbox-innerbox  {
   padding-top: 4px;
 }
 
 menuitem.subviewbutton {
   -moz-appearance: none !important;
 }
 
-menu.subviewbutton > .menu-right {
-  -moz-appearance: none;
-  list-style-image: url(chrome://browser/skin/places/bookmarks-menu-arrow.png);
-  -moz-image-region: rect(0, 16px, 16px, 0);
-  width: 16px;
-  height: 16px;
-}
-
-menu[disabled="true"].subviewbutton > .menu-right {
-  -moz-image-region: rect(0, 32px, 16px, 16px);
-}
-
-menu.subviewbutton > .menu-right:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
 .subviewradio > .radio-label-box {
   -moz-appearance: none;
 }
 
 /*
  * #pageActionFeedbackAnimatableImage is wider than the panel, and due to a
  * bug in panels on Linux, a box-shadow appears where the image would be if
  * overflow:hidden wasn't applied. Disabling the box-shadow for this panel on

--- a/browser/themes/linux/jar.mn
+++ b/browser/themes/linux/jar.mn
@@ -27,17 +27,16 @@ browser.jar:
   skin/classic/browser/feeds/feedIcon16.png           (feeds/feedIcon16.png)
   skin/classic/browser/feeds/subscribe.css            (feeds/subscribe.css)
   skin/classic/browser/notification-icons/geo-blocked.svg  (notification-icons/geo-blocked.svg)
   skin/classic/browser/notification-icons/geo-detailed.svg (notification-icons/geo-detailed.svg)
   skin/classic/browser/notification-icons/geo.svg          (notification-icons/geo.svg)
   skin/classic/browser/places/allBookmarks.png        (places/allBookmarks.png)
   skin/classic/browser/places/bookmarksMenu.png       (places/bookmarksMenu.png)
   skin/classic/browser/places/bookmarksToolbar.png    (places/bookmarksToolbar.png)
-  skin/classic/browser/places/bookmarks-menu-arrow.png           (places/bookmarks-menu-arrow.png)
 * skin/classic/browser/places/editBookmark.css (places/editBookmark.css)
   skin/classic/browser/places/livemark-item.png       (places/livemark-item.png)
 * skin/classic/browser/places/places.css              (places/places.css)
   skin/classic/browser/places/organizer.css           (places/organizer.css)
   skin/classic/browser/places/organizer.xml           (places/organizer.xml)
   skin/classic/browser/places/tag.png                 (places/tag.png)
   skin/classic/browser/places/toolbarDropMarker.png   (places/toolbarDropMarker.png)
   skin/classic/browser/places/unsortedBookmarks.png   (places/unsortedBookmarks.png)

deleted file mode 100644
index 9418d100e52342fb6792169e70a038ad6372b443..0000000000000000000000000000000000000000
GIT binary patch
literal 0
Hc$@<O00001

--- a/browser/themes/linux/preferences/in-content/preferences.css
+++ b/browser/themes/linux/preferences/in-content/preferences.css
@@ -12,12 +12,8 @@
   /* override the Linux only toolkit rule */
   -moz-appearance: none;
 }
 
 .actionsMenu > .menulist-label-box > .menulist-icon {
   margin-inline-start: 1px;
   margin-inline-end: 8px;
 }
-
-filefield + button {
-  margin-inline-start: -4px;
-}

--- a/browser/themes/osx/customizableui/panelUI.css
+++ b/browser/themes/osx/customizableui/panelUI.css
@@ -34,28 +34,34 @@ panelmultiview .toolbaritem-combined-but
 #appMenu-fxa-container[fxastatus="signedin"] > #appMenu-fxa-status > #appMenu-fxa-avatar {
   margin-inline-start: 18px;
 }
 
 .subviewbutton:not(:-moz-any([image],[targetURI],.cui-withicon, .bookmark-item)) > .menu-iconic-left {
   display: none;
 }
 
-/* Override OSX-specific toolkit styles for the bookmarks panel */
-menu.subviewbutton > .menu-right {
-  margin-inline-end: 0;
+#BMB_bookmarksPopup menupopup[placespopup=true]:-moz-lwtheme {
   -moz-appearance: none;
+  background: transparent;
 }
 
-menu.subviewbutton > .menu-right > image {
- /* We don't want the arrow to highlight when the .subviewbutton is hovered,
-  * so we set the -moz-appearance rule on the image
-  * (which doesn't inherit the _moz-menuactive attribute) instead.
-  */
-  -moz-appearance: menuarrow;
+#BMB_bookmarksPopup menupopup[placespopup=true] > hbox:-moz-lwtheme {
+  background: var(--arrowpanel-background);
+  border-radius: var(--arrowpanel-border-radius);
+  box-shadow: 0 0 0 1px var(--arrowpanel-border-color);
+  color: var(--arrowpanel-color);
+  border: none;
+  margin: 1px;
+}
+
+/* Override OSX-specific toolkit styles for the bookmarks panel */
+menu.subviewbutton > .menu-right {
+  margin-inline-end: -4px;
+  -moz-appearance: none;
 }
 
 .PanelUI-subView menuseparator,
 .cui-widget-panelview menuseparator {
   padding: 0 !important;
 }
 
 #PanelUI-remotetabs-tabslist > label[itemtype="client"] {

--- a/browser/themes/osx/preferences/in-content/preferences.css
+++ b/browser/themes/osx/preferences/in-content/preferences.css
@@ -9,25 +9,15 @@
 }
 
 .actionsMenu > .menulist-label-box > .menulist-icon {
   margin-top: 2px;
   margin-inline-start: 2px;
   margin-inline-end: 8px !important;
 }
 
-#downloadFolder > .fileFieldContentBox {
-  padding-inline-start: 3px;
-}
-
-filefield + button {
-  margin-inline-start: -8px;
-  margin-top: 4px;
-  margin-bottom: 4px;
-}
-
 #popupPolicyRow {
   /* Override styles from
      browser/themes/osx/preferences/preferences.css */
   margin-bottom: 0 !important;
   padding-bottom: 0 !important;
   border-bottom: none;
 }

rename from browser/themes/windows/customizableui/menu-arrow.svg
rename to browser/themes/shared/customizableui/menu-arrow.svg

--- a/browser/themes/shared/customizableui/panelUI.inc.css
+++ b/browser/themes/shared/customizableui/panelUI.inc.css
@@ -798,16 +798,33 @@ panelview .toolbarbutton-1,
   outline: 0;
 }
 
 .subviewbutton > .toolbarbutton-text {
   padding: 0;
   padding-inline-start: 24px; /* This is 16px for the icon + 8px for the padding as defined below. */
 }
 
+.subviewbutton > .menu-right {
+  -moz-appearance: none;
+  list-style-image: url(chrome://browser/skin/customizableui/menu-arrow.svg);
+  -moz-context-properties: fill, fill-opacity;
+  fill: currentColor;
+  /* Reset the rect we inherit from the button */
+  -moz-image-region: auto;
+}
+
+.subviewbutton[disabled="true"] > .menu-right {
+  fill-opacity: 0.6;
+}
+
+.subviewbutton > .menu-right:-moz-locale-dir(rtl) {
+  transform: scaleX(-1);
+}
+
 .subviewbutton > .menu-right,
 .subviewbutton > .menu-accel-container > .menu-iconic-accel,
 .subviewbutton > .menu-iconic-left,
 .subviewbutton > .menu-iconic-text {
   padding-bottom: 0;
   padding-top: 0;
 }
 

--- a/browser/themes/shared/incontentprefs/preferences.inc.css
+++ b/browser/themes/shared/incontentprefs/preferences.inc.css
@@ -210,16 +210,22 @@ button > hbox > label {
 }
 
 #getStarted {
   font-size: 90%;
 }
 
 #downloadFolder {
   margin-inline-start: 0;
+  padding-inline-start: 30px;
+  background: center left 8px / 16px no-repeat;
+}
+
+#downloadFolder:-moz-locale-dir(rtl) {
+  background-position-x: right 8px;
 }
 
 #updateApp > .groupbox-body > label {
   margin: 0 0 4px;
 }
 
 #updateApp > .groupbox-body > description {
   margin: 0;

--- a/browser/themes/shared/jar.inc.mn
+++ b/browser/themes/shared/jar.inc.mn
@@ -28,16 +28,17 @@
   skin/classic/browser/controlcenter/tracking-protection.svg   (../shared/controlcenter/tracking-protection.svg)
   skin/classic/browser/controlcenter/warning-gray.svg          (../shared/controlcenter/warning-gray.svg)
   skin/classic/browser/controlcenter/warning-yellow.svg        (../shared/controlcenter/warning-yellow.svg)
   skin/classic/browser/customizableui/empty-overflow-panel.png     (../shared/customizableui/empty-overflow-panel.png)
   skin/classic/browser/customizableui/empty-overflow-panel@2x.png  (../shared/customizableui/empty-overflow-panel@2x.png)
   skin/classic/browser/customizableui/density-compact.svg      (../shared/customizableui/density-compact.svg)
   skin/classic/browser/customizableui/density-normal.svg       (../shared/customizableui/density-normal.svg)
   skin/classic/browser/customizableui/density-touch.svg        (../shared/customizableui/density-touch.svg)
+  skin/classic/browser/customizableui/menu-arrow.svg           (../shared/customizableui/menu-arrow.svg)
   skin/classic/browser/customizableui/whimsy.png               (../shared/customizableui/whimsy.png)
   skin/classic/browser/downloads/contentAreaDownloadsView.css  (../shared/downloads/contentAreaDownloadsView.css)
   skin/classic/browser/downloads/download-blocked.svg          (../shared/downloads/download-blocked.svg)
   skin/classic/browser/downloads/download-summary.svg          (../shared/downloads/download-summary.svg)
   skin/classic/browser/downloads/download-icons.svg            (../shared/downloads/download-icons.svg)
   skin/classic/browser/downloads/notification-start-animation.svg  (../shared/downloads/notification-start-animation.svg)
   skin/classic/browser/drm-icon.svg                            (../shared/drm-icon.svg)
   skin/classic/browser/fullscreen/insecure.svg                 (../shared/fullscreen/insecure.svg)

--- a/browser/themes/windows/customizableui/panelUI.css
+++ b/browser/themes/windows/customizableui/panelUI.css
@@ -38,33 +38,16 @@
 
 /* Disabled empty item looks too small otherwise, because it has no icon. */
 menuitem.subviewbutton[disabled]:not(.menuitem-iconic) {
   /* This is 16px for an icon + 3px for its margins + 1px for its padding +
    * 2px for its border, see above */
   min-height: 22px;
 }
 
-menu.subviewbutton > .menu-right {
-  -moz-appearance: none;
-  list-style-image: url(chrome://browser/skin/customizableui/menu-arrow.svg);
-  -moz-context-properties: fill, fill-opacity;
-  fill: currentColor;
-  /* Reset the rect we inherit from the button: */
-  -moz-image-region: auto;
-}
-
-menu[disabled="true"].subviewbutton > .menu-right {
-  fill-opacity: 0.6;
-}
-
-menu.subviewbutton > .menu-right:-moz-locale-dir(rtl) {
-  transform: scaleX(-1);
-}
-
 /* Win8 and beyond. */
 @media not all and (-moz-os-version: windows-win7) {
   #BMB_bookmarksPopup menupopup[placespopup=true] > hbox,
   #edit-controls@inAnyPanel@,
   #zoom-controls@inAnyPanel@,
   #edit-controls@inAnyPanel@ > toolbarbutton,
   #zoom-controls@inAnyPanel@ > toolbarbutton {
     border-radius: 0;

--- a/browser/themes/windows/jar.mn
+++ b/browser/themes/windows/jar.mn
@@ -13,17 +13,16 @@ browser.jar:
   skin/classic/browser/monitor_16-10.png
   skin/classic/browser/pageInfo.css
   skin/classic/browser/pageInfo.png
 * skin/classic/browser/searchbar.css
   skin/classic/browser/setDesktopBackground.css
   skin/classic/browser/slowStartup-16.png
   skin/classic/browser/webRTC-indicator.css  (../shared/webRTC-indicator.css)
 * skin/classic/browser/controlcenter/panel.css                 (controlcenter/panel.css)
-  skin/classic/browser/customizableui/menu-arrow.svg           (customizableui/menu-arrow.svg)
 * skin/classic/browser/customizableui/panelUI.css       (customizableui/panelUI.css)
 * skin/classic/browser/downloads/allDownloadsView.css   (downloads/allDownloadsView.css)
 * skin/classic/browser/downloads/downloads.css                 (downloads/downloads.css)
   skin/classic/browser/feeds/feedIcon.png                      (feeds/feedIcon.png)
   skin/classic/browser/feeds/feedIcon16.png                    (feeds/feedIcon16.png)
   skin/classic/browser/feeds/subscribe.css                     (feeds/subscribe.css)
   skin/classic/browser/notification-icons/geo-blocked.svg      (notification-icons/geo-blocked.svg)
   skin/classic/browser/notification-icons/geo-detailed.svg     (notification-icons/geo-detailed.svg)

--- a/browser/themes/windows/preferences/in-content-new/preferences.css
+++ b/browser/themes/windows/preferences/in-content-new/preferences.css
@@ -3,14 +3,13 @@
    - You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 %include ../../../shared/incontentprefs/preferences.inc.css
 
 .actionsMenu > .menulist-label-box > .menulist-icon {
   margin-inline-end: 9px;
 }
 
-textbox + button,
-filefield + button {
+textbox + button {
   margin-inline-start: -4px;
   margin-top: 4px;
   margin-bottom: 4px;
 }

--- a/browser/themes/windows/preferences/in-content/preferences.css
+++ b/browser/themes/windows/preferences/in-content/preferences.css
@@ -6,14 +6,8 @@
 
 :root > * {
   font-size: 1.25em;
 }
 
 .actionsMenu > .menulist-label-box > .menulist-icon {
   margin-inline-end: 9px;
 }
-
-filefield + button {
-  margin-inline-start: -4px;
-  margin-top: 4px;
-  margin-bottom: 4px;
-}

--- a/devtools/client/debugger/new/README.mozilla
+++ b/devtools/client/debugger/new/README.mozilla
@@ -1,13 +1,13 @@
 This is the debugger.html project output.
 See https://github.com/devtools-html/debugger.html
 
-Version 42.0
+Version 43.0
 
-Comparison: https://github.com/devtools-html/debugger.html/compare/release-41...release-42
+Comparison: https://github.com/devtools-html/debugger.html/compare/release-42...release-43
 
 Packages:
 - babel-plugin-transform-es2015-modules-commonjs @6.26.0
 - babel-preset-react @6.24.1
 - react @16.2.0
 - react-dom @16.2.0
 - webpack @3.11.0

--- a/devtools/client/debugger/new/debugger.css
+++ b/devtools/client/debugger/new/debugger.css
@@ -913,16 +913,20 @@ html[dir="rtl"] .tree-node img.arrow {
   border-radius: 2px;
   display: flex;
   flex-direction: row;
   justify-content: center;
   align-items: center;
   padding: 0;
 }
 
+.close-btn:focus {
+  outline: none;
+}
+
 .close-btn .close {
   mask: url("chrome://devtools/skin/images/debugger/close.svg") no-repeat;
   mask-size: 100%;
   background-color: var(--theme-comment);
   width: 8px;
   height: 8px;
   transition: all 0.15s ease-in-out;
   padding: 0;
@@ -2866,29 +2870,32 @@ debug-expression-error {
 }
 
 .breakpoints-list .breakpoint-heading,
 .breakpoints-list .breakpoint {
   font-size: 12px;
   color: var(--theme-content-color1);
   position: relative;
   transition: all 0.25s ease;
-  padding: 0.5em 1em 0.5em 0.5em;
 }
 
 .breakpoints-list .breakpoint-heading,
 .breakpoints-list .breakpoint,
 .breakpoints-exceptions {
   padding: 0.5em 1em 0.5em 0.5em;
 }
 
 .breakpoints-exceptions-caught {
   padding: 0 1em 0.5em 2em;
 }
 
+html[dir="rtl"] .breakpoints-exceptions-caught {
+  padding: 0 2em 0.5em 1em;
+}
+
 .breakpoints-exceptions-options:not(.empty) {
   border-bottom: 1px solid var(--theme-splitter-color);
 }
 
 .breakpoints-exceptions input,
 .breakpoints-exceptions-caught input {
   padding-inline-start: 2px;
   margin-inline-start: 0;
@@ -3431,28 +3438,33 @@ html[dir="rtl"] .breakpoints-list .break
 :root.theme-dark {
   --accordion-header-background: #222225;
   --disclosure-arrow: #7f7f81;
 }
 
 .accordion {
   background-color: var(--theme-sidebar-background);
   width: 100%;
+  list-style-type: none;
+  padding: 0px;
+  margin-top: 0px;
 }
 
 .accordion ._header {
   background-color: var(--accordion-header-background);
   border-bottom: 1px solid var(--theme-splitter-color);
   display: flex;
   font-size: 12px;
   padding: 4px;
   transition: all 0.25s ease;
   width: 100%;
   height: 24px;
   align-items: center;
+  margin: 0px;
+  font-weight: normal;
 
   -webkit-user-select: none;
   -moz-user-select: none;
   -ms-user-select: none;
   -o-user-select: none;
   user-select: none;
   cursor: default;
 }
@@ -3533,17 +3545,18 @@ img.stepOut,
 img.resume,
 img.rewind,
 img.reverseStepOver,
 img.reverseStepIn,
 img.reverseStepOut,
 img.replay-previous,
 img.replay-next,
 img.resume,
-img.shortcuts {
+img.shortcuts,
+img.skipPausing {
   background-color: var(--theme-body-color);
 }
 
 .command-bar img.pause {
   mask: url("chrome://devtools/skin/images/debugger/pause.svg") no-repeat;
 }
 
 .command-bar img.stepOver {
@@ -3615,16 +3628,25 @@ img.shortcuts {
 .command-bar .replay-active {
   color: var(--theme-highlight-blue);
 }
 
 .command-bar .subSettings {
   float: right;
 }
 
+.command-bar .skipPausing {
+  mask: url("chrome://devtools/skin/images/debugger/disable-pausing.svg") no-repeat;
+  mask-size: 100%;
+}
+
+.command-bar .active .skipPausing {
+   background-color: var(--theme-highlight-blue);
+}
+
 .bottom {
   border-bottom: none;
   background-color: var(--theme-body-background);
   border-top: 1px solid var(--theme-splitter-color);
   flex: 0 0 25px;
 }
 
 .command-bar.bottom {

--- a/devtools/client/debugger/new/debugger.js
+++ b/devtools/client/debugger/new/debugger.js
@@ -3225,27 +3225,27 @@ function createPendingBreakpoint(bp) {
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
 
 
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
-exports.replaceOriginalVariableName = exports.getPausePoints = exports.getFramework = exports.mapOriginalExpression = exports.hasSyntaxError = exports.clearSources = exports.setSource = exports.hasSource = exports.getNextStep = exports.clearASTs = exports.clearScopes = exports.clearSymbols = exports.findOutOfScopeLocations = exports.getScopes = exports.getSymbols = exports.getClosestExpression = exports.stopParserWorker = exports.startParserWorker = undefined;
+exports.replaceOriginalVariableName = exports.getPausePoints = exports.getFramework = exports.mapOriginalExpression = exports.hasSyntaxError = exports.clearSources = exports.setSource = exports.hasSource = exports.getNextStep = exports.clearASTs = exports.clearScopes = exports.clearSymbols = exports.findOutOfScopeLocations = exports.getScopes = exports.getSymbols = exports.getClosestExpression = exports.stop = exports.start = undefined;
 
 var _devtoolsUtils = __webpack_require__(1363);
 
 const { WorkerDispatcher } = _devtoolsUtils.workerUtils; /* This Source Code Form is subject to the terms of the Mozilla Public
                                                           * License, v. 2.0. If a copy of the MPL was not distributed with this
                                                           * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
 
 const dispatcher = new WorkerDispatcher();
-const startParserWorker = exports.startParserWorker = dispatcher.start.bind(dispatcher);
-const stopParserWorker = exports.stopParserWorker = dispatcher.stop.bind(dispatcher);
+const start = exports.start = dispatcher.start.bind(dispatcher);
+const stop = exports.stop = dispatcher.stop.bind(dispatcher);
 
 const getClosestExpression = exports.getClosestExpression = dispatcher.task("getClosestExpression");
 const getSymbols = exports.getSymbols = dispatcher.task("getSymbols");
 const getScopes = exports.getScopes = dispatcher.task("getScopes");
 const findOutOfScopeLocations = exports.findOutOfScopeLocations = dispatcher.task("findOutOfScopeLocations");
 const clearSymbols = exports.clearSymbols = dispatcher.task("clearSymbols");
 const clearScopes = exports.clearScopes = dispatcher.task("clearScopes");
 const clearASTs = exports.clearASTs = dispatcher.task("clearASTs");
@@ -5547,16 +5547,17 @@ exports.getGeneratedFrameScope = getGene
 exports.getOriginalFrameScope = getOriginalFrameScope;
 exports.getFrameScopes = getFrameScopes;
 exports.getFrameScope = getFrameScope;
 exports.getSelectedScope = getSelectedScope;
 exports.getSelectedScopeMappings = getSelectedScopeMappings;
 exports.getSelectedFrameId = getSelectedFrameId;
 exports.getTopFrame = getTopFrame;
 exports.getDebuggeeUrl = getDebuggeeUrl;
+exports.getSkipPausing = getSkipPausing;
 exports.getChromeScopes = getChromeScopes;
 
 var _reselect = __webpack_require__(993);
 
 var _devtoolsSourceMap = __webpack_require__(1360);
 
 var _prefs = __webpack_require__(226);
 
@@ -5574,17 +5575,18 @@ const createPauseState = exports.createP
     mappings: {}
   },
   loadedObjects: {},
   shouldPauseOnExceptions: _prefs.prefs.pauseOnExceptions,
   shouldIgnoreCaughtExceptions: _prefs.prefs.ignoreCaughtExceptions,
   canRewind: false,
   debuggeeUrl: "",
   command: null,
-  previousLocation: null
+  previousLocation: null,
+  skipPausing: _prefs.prefs.skipPausing
 });
 
 const emptyPauseState = {
   frames: null,
   frameScopes: {
     generated: {},
     original: {},
     mappings: {}
@@ -5719,16 +5721,24 @@ function update(state = createPauseState
 
     case "EVALUATE_EXPRESSION":
       return _extends({}, state, {
         command: action.status === "start" ? "expression" : null
       });
 
     case "NAVIGATE":
       return _extends({}, state, emptyPauseState, { debuggeeUrl: action.url });
+
+    case "TOGGLE_SKIP_PAUSING":
+      {
+        const { skipPausing } = action;
+        _prefs.prefs.skipPausing = skipPausing;
+
+        return _extends({}, state, { skipPausing });
+      }
   }
 
   return state;
 }
 
 function buildPreviousLocation(state, action) {
   const { frames, previousLocation } = state;
 
@@ -5876,16 +5886,20 @@ const getSelectedFrame = exports.getSele
   }
   return frames.find(frame => frame.id == selectedFrameId);
 });
 
 function getDebuggeeUrl(state) {
   return state.pause.debuggeeUrl;
 }
 
+function getSkipPausing(state) {
+  return state.pause.skipPausing;
+}
+
 // NOTE: currently only used for chrome
 function getChromeScopes(state) {
   const frame = getSelectedFrame(state);
   return frame ? frame.scopeChain : undefined;
 }
 
 exports.default = update;
 
@@ -5895,30 +5909,29 @@ exports.default = update;
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
 
 
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
-exports.findSourceMatches = exports.searchSources = exports.getMatches = exports.stopSearchWorker = exports.startSearchWorker = undefined;
+exports.findSourceMatches = exports.getMatches = exports.stop = exports.start = undefined;
 
 var _devtoolsUtils = __webpack_require__(1363);
 
 const { WorkerDispatcher } = _devtoolsUtils.workerUtils; /* This Source Code Form is subject to the terms of the Mozilla Public
                                                           * License, v. 2.0. If a copy of the MPL was not distributed with this
                                                           * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
 
 const dispatcher = new WorkerDispatcher();
-const startSearchWorker = exports.startSearchWorker = dispatcher.start.bind(dispatcher);
-const stopSearchWorker = exports.stopSearchWorker = dispatcher.stop.bind(dispatcher);
+const start = exports.start = dispatcher.start.bind(dispatcher);
+const stop = exports.stop = dispatcher.stop.bind(dispatcher);
 
 const getMatches = exports.getMatches = dispatcher.task("getMatches");
-const searchSources = exports.searchSources = dispatcher.task("searchSources");
 const findSourceMatches = exports.findSourceMatches = dispatcher.task("findSourceMatches");
 
 /***/ }),
 
 /***/ 1396:
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -6339,22 +6352,25 @@ var _selectors = __webpack_require__(359
 async function getGeneratedLocation(state, source, location, sourceMaps) {
   if (!sourceMaps.isOriginalId(location.sourceId)) {
     return location;
   }
 
   const { line, sourceId, column } = await sourceMaps.getGeneratedLocation(location, source);
 
   const generatedSource = (0, _selectors.getSource)(state, sourceId);
-  const sourceUrl = generatedSource.get("url");
+  if (!generatedSource) {
+    return location;
+  }
+
   return {
     line,
     sourceId,
     column: column === 0 ? undefined : column,
-    sourceUrl
+    sourceUrl: generatedSource.url
   };
 } /* This Source Code Form is subject to the terms of the Mozilla Public
    * License, v. 2.0. If a copy of the MPL was not distributed with this
    * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
 
 /***/ }),
 
 /***/ 1398:
@@ -9050,20 +9066,26 @@ var _reactDom = __webpack_require__(4);
 var _reactDom2 = _interopRequireDefault(_reactDom);
 
 var _devtoolsConfig = __webpack_require__(1355);
 
 var _devtoolsSourceMap = __webpack_require__(1360);
 
 var _search = __webpack_require__(1395);
 
+var search = _interopRequireWildcard(_search);
+
 var _prettyPrint = __webpack_require__(1431);
 
+var prettyPrint = _interopRequireWildcard(_prettyPrint);
+
 var _parser = __webpack_require__(1365);
 
+var parser = _interopRequireWildcard(_parser);
+
 var _createStore = __webpack_require__(1658);
 
 var _createStore2 = _interopRequireDefault(_createStore);
 
 var _reducers = __webpack_require__(1516);
 
 var _reducers2 = _interopRequireDefault(_reducers);
 
@@ -9113,29 +9135,30 @@ function bootstrapStore(client, { servic
   return { store, actions, selectors };
 }
 
 function bootstrapWorkers() {
   if (!(0, _devtoolsConfig.isFirefoxPanel)()) {
     // When used in Firefox, the toolbox manages the source map worker.
     (0, _devtoolsSourceMap.startSourceMapWorker)((0, _devtoolsConfig.getValue)("workers.sourceMapURL"));
   }
-  (0, _prettyPrint.startPrettyPrintWorker)((0, _devtoolsConfig.getValue)("workers.prettyPrintURL"));
-  (0, _parser.startParserWorker)((0, _devtoolsConfig.getValue)("workers.parserURL"));
-  (0, _search.startSearchWorker)((0, _devtoolsConfig.getValue)("workers.searchURL"));
+  prettyPrint.start((0, _devtoolsConfig.getValue)("workers.prettyPrintURL"));
+  parser.start((0, _devtoolsConfig.getValue)("workers.parserURL"));
+  search.start((0, _devtoolsConfig.getValue)("workers.searchURL"));
+  return { prettyPrint, parser, search };
 }
 
 function teardownWorkers() {
   if (!(0, _devtoolsConfig.isFirefoxPanel)()) {
     // When used in Firefox, the toolbox manages the source map worker.
     (0, _devtoolsSourceMap.stopSourceMapWorker)();
   }
-  (0, _prettyPrint.stopPrettyPrintWorker)();
-  (0, _parser.stopParserWorker)();
-  (0, _search.stopSearchWorker)();
+  prettyPrint.stop();
+  parser.stop();
+  search.stop();
 }
 
 function bootstrapApp(store) {
   if ((0, _devtoolsConfig.isFirefoxPanel)()) {
     renderPanel(_App2.default, store);
   } else {
     const { renderRoot } = __webpack_require__(52);
     renderRoot(_react2.default, _reactDom2.default, _App2.default, store);
@@ -9156,17 +9179,17 @@ function updatePrefs(state) {
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
 
 
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
-exports.stopPrettyPrintWorker = exports.startPrettyPrintWorker = undefined;
+exports.stop = exports.start = undefined;
 exports.prettyPrint = prettyPrint;
 
 var _devtoolsUtils = __webpack_require__(1363);
 
 var _source = __webpack_require__(1356);
 
 var _assert = __webpack_require__(1384);
 
@@ -9174,18 +9197,18 @@ var _assert2 = _interopRequireDefault(_a
 
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
 const { WorkerDispatcher } = _devtoolsUtils.workerUtils; /* This Source Code Form is subject to the terms of the Mozilla Public
                                                           * License, v. 2.0. If a copy of the MPL was not distributed with this
                                                           * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
 
 const dispatcher = new WorkerDispatcher();
-const startPrettyPrintWorker = exports.startPrettyPrintWorker = dispatcher.start.bind(dispatcher);
-const stopPrettyPrintWorker = exports.stopPrettyPrintWorker = dispatcher.stop.bind(dispatcher);
+const start = exports.start = dispatcher.start.bind(dispatcher);
+const stop = exports.stop = dispatcher.stop.bind(dispatcher);
 const _prettyPrint = dispatcher.task("prettyPrint");
 
 async function prettyPrint({ source, url }) {
   const indent = 2;
 
   (0, _assert2.default)((0, _source.isJavaScript)(source), "Can't prettify non-javascript files.");
 
   return await _prettyPrint({
@@ -12303,32 +12326,32 @@ exports.register = function (window) {};
 "use strict";
 
 
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
 exports.onConnect = undefined;
 
+var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; /* This Source Code Form is subject to the terms of the Mozilla Public
+                                                                                                                                                                                                                                                                   * License, v. 2.0. If a copy of the MPL was not distributed with this
+                                                                                                                                                                                                                                                                   * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
 var _firefox = __webpack_require__(1500);
 
 var firefox = _interopRequireWildcard(_firefox);
 
 var _prefs = __webpack_require__(226);
 
 var _dbg = __webpack_require__(2246);
 
 var _bootstrap = __webpack_require__(1430);
 
 function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
 
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
-
 function loadFromPrefs(actions) {
   const { pauseOnExceptions, ignoreCaughtExceptions } = _prefs.prefs;
   if (pauseOnExceptions || ignoreCaughtExceptions) {
     return actions.pauseOnExceptions(pauseOnExceptions, ignoreCaughtExceptions);
   }
 }
 
 async function onConnect(connection, { services, toolboxActions }) {
@@ -12338,24 +12361,25 @@ async function onConnect(connection, { s
   }
 
   const commands = firefox.clientCommands;
   const { store, actions, selectors } = (0, _bootstrap.bootstrapStore)(commands, {
     services,
     toolboxActions
   });
 
-  (0, _bootstrap.bootstrapWorkers)();
+  const workers = (0, _bootstrap.bootstrapWorkers)();
   await firefox.onConnect(connection, actions);
   await loadFromPrefs(actions);
 
   (0, _dbg.setupHelper)({
     store,
     actions,
     selectors,
+    workers: _extends({}, workers, services),
     connection,
     client: firefox.clientCommands
   });
 
   (0, _bootstrap.bootstrapApp)(store);
   return { store, actions, selectors, client: commands };
 }
 
@@ -12699,16 +12723,24 @@ function disablePrettyPrint(sourceId) {
   const sourceClient = threadClient.source({ actor: sourceId });
   return sourceClient.disablePrettyPrint();
 }
 
 async function setPausePoints(sourceId, pausePoints) {
   return sendPacket({ to: sourceId, type: "setPausePoints", pausePoints });
 }
 
+async function setSkipPausing(shouldSkip) {
+  return threadClient.request({
+    skip: shouldSkip,
+    to: threadClient.actor,
+    type: "skipPausing"
+  });
+}
+
 function interrupt() {
   return threadClient.interrupt();
 }
 
 function eventListeners() {
   return threadClient.eventListeners();
 }
 
@@ -12797,17 +12829,18 @@ const clientCommands = {
   getProperties,
   getFrameScopes,
   pauseOnExceptions,
   prettyPrint,
   disablePrettyPrint,
   fetchSources,
   fetchWorkers,
   sendPacket,
-  setPausePoints
+  setPausePoints,
+  setSkipPausing
 };
 
 exports.setupCommands = setupCommands;
 exports.clientCommands = clientCommands;
 
 /***/ }),
 
 /***/ 1502:
@@ -17520,31 +17553,26 @@ class Editor extends _react.PureComponen
     }
 
     this.setState({ editor });
     (0, _editor.setEditor)(editor);
     return editor;
   }
 
   componentDidMount() {
-    const editor = this.setupEditor();
-
-    const { selectedSource } = this.props;
     const { shortcuts } = this.context;
 
     const searchAgainKey = L10N.getStr("sourceSearch.search.again.key2");
     const searchAgainPrevKey = L10N.getStr("sourceSearch.search.againPrev.key2");
 
     shortcuts.on(L10N.getStr("toggleBreakpoint.key"), this.onToggleBreakpoint);
     shortcuts.on(L10N.getStr("toggleCondPanel.key"), this.onToggleConditionalPanel);
     shortcuts.on("Esc", this.onEscape);
     shortcuts.on(searchAgainPrevKey, this.onSearchAgain);
     shortcuts.on(searchAgainKey, this.onSearchAgain);
-
-    (0, _editor.updateDocument)(editor, selectedSource);
   }
 
   componentWillUnmount() {
     if (this.state.editor) {
       this.state.editor.destroy();
       this.setState({ editor: null });
     }
 
@@ -17553,22 +17581,28 @@ class Editor extends _react.PureComponen
     const shortcuts = this.context.shortcuts;
     shortcuts.off(L10N.getStr("toggleBreakpoint.key"));
     shortcuts.off(L10N.getStr("toggleCondPanel.key"));
     shortcuts.off(searchAgainPrevKey);
     shortcuts.off(searchAgainKey);
   }
 
   componentDidUpdate(prevProps, prevState) {
+    const { selectedSource } = this.props;
     // NOTE: when devtools are opened, the editor is not set when
     // the source loads so we need to wait until the editor is
     // set to update the text and size.
-    if (!prevState.editor && this.state.editor) {
-      this.setText(this.props);
-      this.setSize(this.props);
+    if (!prevState.editor && selectedSource) {
+      if (!this.state.editor) {
+        const editor = this.setupEditor();
+        (0, _editor.updateDocument)(editor, selectedSource);
+      } else {
+        this.setText(this.props);
+        this.setSize(this.props);
+      }
     }
   }
 
   getCurrentLine() {
     const { codeMirror } = this.state.editor;
     const { selectedSource } = this.props;
     const line = (0, _editor.getCursorLine)(codeMirror);
 
@@ -17670,16 +17704,17 @@ class Editor extends _react.PureComponen
 
   setText(props) {
     const { selectedSource, symbols } = props;
 
     if (!this.state.editor) {
       return;
     }
 
+    // check if we previously had a selected source
     if (!selectedSource) {
       return this.clearEditor();
     }
 
     if (!(0, _source.isLoaded)(selectedSource)) {
       return (0, _editor.showLoading)(this.state.editor);
     }
 
@@ -22900,17 +22935,17 @@ class SecondaryPanes extends _react.Comp
     const {
       toggleAllBreakpoints,
       breakpoints,
       breakpointsDisabled,
       breakpointsLoading
     } = this.props;
     const isIndeterminate = !breakpointsDisabled && breakpoints.some(x => x.disabled);
 
-    if (breakpoints.size == 0) {
+    if (_prefs.features.skipPausing || breakpoints.size == 0) {
       return null;
     }
 
     const inputProps = {
       type: "checkbox",
       "aria-label": breakpointsDisabled ? L10N.getStr("breakpoints.enable") : L10N.getStr("breakpoints.disable"),
       className: "breakpoints-toggle",
       disabled: breakpointsLoading,
@@ -23618,17 +23653,17 @@ class Expressions extends _react.Compone
 
   render() {
     const { expressions, showInput } = this.props;
 
     return _react2.default.createElement(
       "ul",
       { className: "pane expressions-list" },
       expressions.map(this.renderExpression),
-      showInput && this.renderNewExpressionInput()
+      (showInput || !expressions.size) && this.renderNewExpressionInput()
     );
   }
 }
 
 exports.default = (0, _reactRedux.connect)(state => ({
   expressions: (0, _selectors.getExpressions)(state),
   expressionError: (0, _selectors.getExpressionError)(state)
 }), _actions2.default)(Expressions);
@@ -24289,20 +24324,20 @@ function _interopRequireDefault(obj) { r
 class Accordion extends _react.Component {
   constructor(props) {
     super(props);
 
     this.renderContainer = (item, i) => {
       const { opened } = item;
 
       return _react2.default.createElement(
-        "div",
-        { className: item.className, key: i },
+        "li",
+        { role: "listitem", className: item.className, key: i },
         _react2.default.createElement(
-          "div",
+          "h2",
           {
             className: "_header",
             tabIndex: "0",
             onClick: () => this.handleHeaderClick(i)
           },
           _react2.default.createElement(_Svg2.default, { name: "arrow", className: opened ? "expanded" : "" }),
           item.header,
           item.buttons ? _react2.default.createElement(
@@ -24336,18 +24371,18 @@ class Accordion extends _react.Component
 
     // We force an update because otherwise the accordion
     // would not re-render
     this.forceUpdate();
   }
 
   render() {
     return _react2.default.createElement(
-      "div",
-      { className: "accordion" },
+      "ul",
+      { role: "list", className: "accordion" },
       this.props.items.map(this.renderContainer)
     );
   }
 } /* This Source Code Form is subject to the terms of the Mozilla Public
    * License, v. 2.0. If a copy of the MPL was not distributed with this
    * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
 
 exports.default = Accordion;
@@ -24590,46 +24625,68 @@ class CommandBar extends _react.Componen
       _react2.default.createElement(
         "span",
         { className: activeNext },
         total
       )
     );
   }
 
+  renderSkipPausingButton() {
+    const { skipPausing, toggleSkipPausing } = this.props;
+
+    if (!_prefs.features.skipPausing) {
+      return null;
+    }
+
+    return _react2.default.createElement(
+      "button",
+      {
+        className: (0, _classnames2.default)("command-bar-button", {
+          active: skipPausing
+        }),
+        title: L10N.getStr("skipPausingTooltip"),
+        onClick: toggleSkipPausing
+      },
+      _react2.default.createElement("img", { className: "skipPausing" })
+    );
+  }
+
   render() {
     return _react2.default.createElement(
       "div",
       {
         className: (0, _classnames2.default)("command-bar", {
           vertical: !this.props.horizontal
         })
       },
       this.renderPauseButton(),
       this.renderStepButtons(),
       this.renderTimeTravelButtons(),
       _react2.default.createElement("div", { className: "filler" }),
       this.replayPreviousButton(),
       this.renderStepPosition(),
-      this.replayNextButton()
+      this.replayNextButton(),
+      this.renderSkipPausingButton()
     );
   }
 }
 
 CommandBar.contextTypes = {
   shortcuts: _propTypes2.default.object
 };
 
 exports.default = (0, _reactRedux.connect)(state => {
   return {
     isPaused: (0, _selectors.isPaused)(state),
     history: (0, _selectors.getHistory)(state),
     historyPosition: (0, _selectors.getHistoryPosition)(state),
     isWaitingOnBreak: (0, _selectors.getIsWaitingOnBreak)(state),
-    canRewind: (0, _selectors.getCanRewind)(state)
+    canRewind: (0, _selectors.getCanRewind)(state),
+    skipPausing: (0, _selectors.getSkipPausing)(state)
   };
 }, dispatch => (0, _redux.bindActionCreators)(_actions2.default, dispatch))(CommandBar);
 
 /***/ }),
 
 /***/ 1609:
 /***/ (function(module, exports, __webpack_require__) {
 
@@ -25130,16 +25187,31 @@ function _interopRequireDefault(obj) { r
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
 
 class Tabs extends _react.PureComponent {
 
   constructor(props) {
     super(props);
 
+    this.updateHiddenTabs = () => {
+      if (!this.refs.sourceTabs) {
+        return;
+      }
+      const { selectedSource, tabSources, moveTab } = this.props;
+      const sourceTabEls = this.refs.sourceTabs.children;
+      const hiddenTabs = (0, _tabs.getHiddenTabs)(tabSources, sourceTabEls);
+
+      if ((0, _ui.isVisible)() && hiddenTabs.indexOf(selectedSource) !== -1) {
+        return moveTab(selectedSource.url, 0);
+      }
+
+      this.setState({ hiddenTabs });
+    };
+
     this.renderDropdownSource = source => {
       const { selectSpecificSource } = this.props;
       const filename = (0, _source.getFilename)(source.toJS());
 
       const onClick = () => selectSpecificSource(source.id);
       return _react2.default.createElement(
         "li",
         { key: source.id, onClick: onClick },
@@ -25160,42 +25232,29 @@ class Tabs extends _react.PureComponent 
 
   componentDidUpdate(prevProps) {
     if (!(prevProps === this.props)) {
       this.updateHiddenTabs();
     }
   }
 
   componentDidMount() {
-    this.updateHiddenTabs();
+    window.requestIdleCallback(this.updateHiddenTabs);
     window.addEventListener("resize", this.onResize);
   }
 
   componentWillUnmount() {
     window.removeEventListener("resize", this.onResize);
   }
 
   /*
    * Updates the hiddenSourceTabs state, by
    * finding the source tabs which are wrapped and are not on the top row.
    */
-  updateHiddenTabs() {
-    if (!this.refs.sourceTabs) {
-      return;
-    }
-    const { selectedSource, tabSources, moveTab } = this.props;
-    const sourceTabEls = this.refs.sourceTabs.children;
-    const hiddenTabs = (0, _tabs.getHiddenTabs)(tabSources, sourceTabEls);
-
-    if ((0, _ui.isVisible)() && hiddenTabs.indexOf(selectedSource) !== -1) {
-      return moveTab(selectedSource.url, 0);
-    }
-
-    this.setState({ hiddenTabs });
-  }
+
 
   toggleSourcesDropdown(e) {
     this.setState(prevState => ({
       dropdownShown: !prevState.dropdownShown
     }));
   }
 
   getIconClass(source) {
@@ -26844,16 +26903,25 @@ var _selectFrame = __webpack_require__(1
 
 Object.defineProperty(exports, "selectFrame", {
   enumerable: true,
   get: function () {
     return _selectFrame.selectFrame;
   }
 });
 
+var _skipPausing = __webpack_require__(3640);
+
+Object.defineProperty(exports, "toggleSkipPausing", {
+  enumerable: true,
+  get: function () {
+    return _skipPausing.toggleSkipPausing;
+  }
+});
+
 /***/ }),
 
 /***/ 164:
 /***/ (function(module, exports, __webpack_require__) {
 
 (function() {
   var computeScore, countDir, file_coeff, getExtension, getExtensionScore, isMatch, scorePath, scoreSize, tau_depth, _ref;
 
@@ -34309,32 +34377,34 @@ if (isDevelopment()) {
   pref("devtools.debugger.pending-selected-location", "{}");
   pref("devtools.debugger.pending-breakpoints", "{}");
   pref("devtools.debugger.expressions", "[]");
   pref("devtools.debugger.file-search-case-sensitive", false);
   pref("devtools.debugger.file-search-whole-word", false);
   pref("devtools.debugger.file-search-regex-match", false);
   pref("devtools.debugger.project-directory-root", "");
   pref("devtools.debugger.prefs-schema-version", "1.0.1");
+  pref("devtools.debugger.skip-pausing", false);
   pref("devtools.debugger.features.workers", true);
   pref("devtools.debugger.features.async-stepping", true);
   pref("devtools.debugger.features.wasm", true);
   pref("devtools.debugger.features.shortcuts", true);
   pref("devtools.debugger.features.root", true);
   pref("devtools.debugger.features.column-breakpoints", false);
   pref("devtools.debugger.features.map-scopes", true);
   pref("devtools.debugger.features.remove-command-bar-options", true);
   pref("devtools.debugger.features.code-coverage", false);
   pref("devtools.debugger.features.event-listeners", false);
   pref("devtools.debugger.features.code-folding", false);
   pref("devtools.debugger.features.outline", true);
   pref("devtools.debugger.features.column-breakpoints", true);
   pref("devtools.debugger.features.replay", true);
   pref("devtools.debugger.features.pause-points", true);
   pref("devtools.debugger.features.component-stack", true);
+  pref("devtools.debugger.features.skip-pausing", false);
 }
 
 const prefs = new PrefsHelper("devtools", {
   alphabetizeOutline: ["Bool", "debugger.alphabetize-outline"],
   autoPrettyPrint: ["Bool", "debugger.auto-pretty-print"],
   clientSourceMapsEnabled: ["Bool", "source-map.client-service.enabled"],
   pauseOnExceptions: ["Bool", "debugger.pause-on-exceptions"],
   ignoreCaughtExceptions: ["Bool", "debugger.ignore-caught-exceptions"],
@@ -34352,17 +34422,18 @@ const prefs = new PrefsHelper("devtools"
   tabsBlackBoxed: ["Json", "debugger.tabsBlackBoxed", []],
   pendingSelectedLocation: ["Json", "debugger.pending-selected-location", {}],
   pendingBreakpoints: ["Json", "debugger.pending-breakpoints", {}],
   expressions: ["Json", "debugger.expressions", []],
   fileSearchCaseSensitive: ["Bool", "debugger.file-search-case-sensitive"],
   fileSearchWholeWord: ["Bool", "debugger.file-search-whole-word"],
   fileSearchRegexMatch: ["Bool", "debugger.file-search-regex-match"],
   debuggerPrefsSchemaVersion: ["Char", "debugger.prefs-schema-version"],
-  projectDirectoryRoot: ["Char", "debugger.project-directory-root", ""]
+  projectDirectoryRoot: ["Char", "debugger.project-directory-root", ""],
+  skipPausing: ["Bool", "debugger.skip-pausing"]
 });
 /* harmony export (immutable) */ __webpack_exports__["prefs"] = prefs;
 
 
 const features = new PrefsHelper("devtools.debugger.features", {
   asyncStepping: ["Bool", "async-stepping"],
   wasm: ["Bool", "wasm"],
   shortcuts: ["Bool", "shortcuts"],
@@ -34372,17 +34443,18 @@ const features = new PrefsHelper("devtoo
   removeCommandBarOptions: ["Bool", "remove-command-bar-options"],
   workers: ["Bool", "workers"],
   codeCoverage: ["Bool", "code-coverage"],
   eventListeners: ["Bool", "event-listeners"],
   outline: ["Bool", "outline"],
   codeFolding: ["Bool", "code-folding"],
   replay: ["Bool", "replay"],
   pausePoints: ["Bool", "pause-points"],
-  componentStack: ["Bool", "component-stack"]
+  componentStack: ["Bool", "component-stack"],
+  skipPausing: ["Bool", "skip-pausing"]
 });
 /* harmony export (immutable) */ __webpack_exports__["features"] = features;
 
 
 if (prefs.debuggerPrefsSchemaVersion !== prefsSchemaVersion) {
   // clear pending Breakpoints
   prefs.pendingBreakpoints = {};
   prefs.debuggerPrefsSchemaVersion = prefsSchemaVersion;
@@ -34656,155 +34728,163 @@ function locColumn(loc) {
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
 
 
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
-
-var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; /* This Source Code Form is subject to the terms of the Mozilla Public
-                                                                                                                                                                                                                                                                   * License, v. 2.0. If a copy of the MPL was not distributed with this
-                                                                                                                                                                                                                                                                   * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
-
-// eslint-disable-next-line max-len
-
-
 exports.findGeneratedBindingFromPosition = findGeneratedBindingFromPosition;
 
 var _locColumn = __webpack_require__(2349);
 
 var _filtering = __webpack_require__(3635);
 
 var _firefox = __webpack_require__(1500);
 
-async function findGeneratedBindingFromPosition(sourceMaps, client, source, pos, name, type, generatedAstBindings) {
-  const range = await getGeneratedLocationRange(pos, source, type, sourceMaps);
-
-  if (range) {
-    let result;
-    if (type === "import") {
-      result = await findGeneratedImportReference(type, generatedAstBindings, _extends({
-        type: pos.type
-      }, range));
-    } else {
-      result = await findGeneratedReference(type, generatedAstBindings, _extends({
-        type: pos.type
-      }, range));
-    }
-
-    if (result) {
-      return result;
-    }
-  }
-
-  if (type === "import" && pos.type === "decl") {
-    let importRange = range;
-    if (!importRange) {
-      // If the imported name itself does not map to a useful range, fall back
-      // to resolving the bindinding using the location of the overall
-      // import declaration.
-      importRange = await getGeneratedLocationRange({
-        type: pos.type,
-        start: pos.declaration.start,
-        end: pos.declaration.end
-      }, source, type, sourceMaps);
-
-      if (!importRange) {
-        return null;
-      }
-    }
-
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+async function findGeneratedBindingFromPosition(sourceMaps, client, source, pos, name, bindingType, generatedAstBindings) {
+  const locationType = pos.type;
+
+  const generatedRanges = await getGeneratedLocationRanges(source, pos, bindingType, locationType, sourceMaps);
+  const applicableBindings = filterApplicableBindings(generatedAstBindings, generatedRanges);
+
+  let result;
+  if (bindingType === "import") {
+    result = await findGeneratedImportReference(applicableBindings);
+  } else {
+    result = await findGeneratedReference(applicableBindings);
+  }
+
+  if (result) {
+    return result;
+  }
+
+  if (bindingType === "import" && pos.type === "decl") {
     const importName = pos.importName;
     if (typeof importName !== "string") {
       // Should never happen, just keeping Flow happy.
       return null;
     }
 
-    return await findGeneratedImportDeclaration(generatedAstBindings, _extends({
-      importName
-    }, importRange));
+    let applicableImportBindings = applicableBindings;
+    if (generatedRanges.length === 0) {
+      // If the imported name itself does not map to a useful range, fall back
+      // to resolving the bindinding using the location of the overall
+      // import declaration.
+      const importRanges = await getGeneratedLocationRanges(source, pos.declaration, bindingType, locationType, sourceMaps);
+      applicableImportBindings = filterApplicableBindings(generatedAstBindings, importRanges);
+
+      if (applicableImportBindings.length === 0) {
+        return null;
+      }
+    }
+
+    return await findGeneratedImportDeclaration(applicableImportBindings, importName);
   }
 
   return null;
 }
-
-function filterApplicableBindings(bindings, mapped) {
-  // Any binding overlapping a part of the mapping range.
-  return (0, _filtering.filterSortedArray)(bindings, binding => {
-    if (positionCmp(binding.loc.end, mapped.start) <= 0) {
-      return -1;
-    }
-    if (positionCmp(binding.loc.start, mapped.end) >= 0) {
-      return 1;
-    }
-
-    return 0;
-  });
+// eslint-disable-next-line max-len
+
+
+function filterApplicableBindings(bindings, ranges) {
+  const result = [];
+  for (const range of ranges) {
+    // Any binding overlapping a part of the mapping range.
+    const filteredBindings = (0, _filtering.filterSortedArray)(bindings, binding => {
+      if (positionCmp(binding.loc.end, range.start) <= 0) {
+        return -1;
+      }
+      if (positionCmp(binding.loc.start, range.end) >= 0) {
+        return 1;
+      }
+
+      return 0;
+    });
+
+    let firstInRange = true;
+    let firstOnLine = true;
+    let line = -1;
+
+    for (const binding of filteredBindings) {
+      if (binding.loc.start.line === line) {
+        firstOnLine = false;
+      } else {
+        line = binding.loc.start.line;
+        firstOnLine = true;
+      }
+
+      result.push({
+        binding,
+        range,
+        firstOnLine,
+        firstInRange
+      });
+
+      firstInRange = false;
+    }
+  }
+
+  return result;
 }
 
 /**
  * Given a mapped range over the generated source, attempt to resolve a real
  * binding descriptor that can be used to access the value.
  */
-async function findGeneratedReference(type, generatedAstBindings, mapped) {
-  const bindings = filterApplicableBindings(generatedAstBindings, mapped);
-
-  let lineStart = true;
-  let line = -1;
-
-  return bindings.reduce(async (acc, val, i) => {
-    const accVal = await acc;
-    if (accVal) {
-      return accVal;
-    }
-
-    if (val.loc.start.line === line) {
-      lineStart = false;
-    } else {
-      line = val.loc.start.line;
-      lineStart = true;
-    }
-
-    return mapBindingReferenceToDescriptor(val, mapped, lineStart);
-  }, null);
-}
-
-async function findGeneratedImportReference(type, generatedAstBindings, mapped) {
-  let bindings = filterApplicableBindings(generatedAstBindings, mapped);
-
+async function findGeneratedReference(applicableBindings) {
+  for (const applicable of applicableBindings) {
+    const result = await mapBindingReferenceToDescriptor(applicable);
+    if (result) {
+      return result;
+    }
+  }
+  return null;
+}
+
+async function findGeneratedImportReference(applicableBindings) {
   // When wrapped, for instance as `Object(ns.default)`, the `Object` binding
   // will be the first in the list. To avoid resolving `Object` as the
   // value of the import itself, we potentially skip the first binding.
-  if (bindings.length > 1 && !bindings[0].loc.meta && bindings[1].loc.meta) {
-    bindings = bindings.slice(1);
-  }
-
-  return bindings.reduce(async (acc, val) => {
-    const accVal = await acc;
-    if (accVal) {
-      return accVal;
-    }
-
-    return mapImportReferenceToDescriptor(val, mapped);
-  }, null);
+  applicableBindings = applicableBindings.filter((applicable, i) => {
+    if (!applicable.firstInRange || applicable.binding.loc.type !== "ref" || applicable.binding.loc.meta) {
+      return true;
+    }
+
+    const next = i + 1 < applicableBindings.length ? applicableBindings[i + 1] : null;
+
+    return !next || next.binding.loc.type !== "ref" || !next.binding.loc.meta;
+  });
+
+  for (const applicable of applicableBindings) {
+    const result = await mapImportReferenceToDescriptor(applicable);
+    if (result) {
+      return result;
+    }
+  }
+
+  return null;
 }
 
 /**
  * Given a mapped range over the generated source and the name of the imported
  * value that is referenced, attempt to resolve a binding descriptor for
  * the import's value.
  */
-async function findGeneratedImportDeclaration(generatedAstBindings, mapped) {
-  const bindings = filterApplicableBindings(generatedAstBindings, mapped);
-
+async function findGeneratedImportDeclaration(applicableBindings, importName) {
   let result = null;
 
-  for (const binding of bindings) {
+  for (const _ref of applicableBindings) {
+    const { binding } = _ref;
+
     if (binding.loc.type !== "decl") {
       continue;
     }
 
     const namespaceDesc = await binding.desc();
     if (isPrimitiveValue(namespaceDesc)) {
       continue;
     }
@@ -34820,18 +34900,18 @@ async function findGeneratedImportDeclar
       result = {
         name: binding.name,
         desc: namespaceDesc,
         expression: binding.name
       };
       continue;
     }
 
-    const desc = await readDescriptorProperty(namespaceDesc, mapped.importName);
-    const expression = `${binding.name}.${mapped.importName}`;
+    const desc = await readDescriptorProperty(namespaceDesc, importName);
+    const expression = `${binding.name}.${importName}`;
 
     if (desc) {
       result = {
         name: binding.name,
         desc,
         expression
       };
       break;
@@ -34840,44 +34920,52 @@ async function findGeneratedImportDeclar
 
   return result;
 }
 
 /**
  * Given a generated binding, and a range over the generated code, statically
  * check if the given binding matches the range.
  */
-async function mapBindingReferenceToDescriptor(binding, mapped, isFirst) {
+async function mapBindingReferenceToDescriptor({
+  binding,
+  range,
+  firstInRange,
+  firstOnLine
+}) {
   // Allow the mapping to point anywhere within the generated binding
   // location to allow for less than perfect sourcemaps. Since you also
   // need at least one character between identifiers, we also give one
   // characters of space at the front the generated binding in order
   // to increase the probability of finding the right mapping.
-  if (mapped.start.line === binding.loc.start.line && (
+  if (range.start.line === binding.loc.start.line && (
   // If a binding is the first on a line, Babel will extend the mapping to
   // include the whitespace between the newline and the binding. To handle
   // that, we skip the range requirement for starting location.
-  isFirst || (0, _locColumn.locColumn)(mapped.start) >= (0, _locColumn.locColumn)(binding.loc.start)) && (0, _locColumn.locColumn)(mapped.start) <= (0, _locColumn.locColumn)(binding.loc.end)) {
+  firstInRange || firstOnLine || (0, _locColumn.locColumn)(range.start) >= (0, _locColumn.locColumn)(binding.loc.start)) && (0, _locColumn.locColumn)(range.start) <= (0, _locColumn.locColumn)(binding.loc.end)) {
     return {
       name: binding.name,
       desc: await binding.desc(),
       expression: binding.name
     };
   }
 
   return null;
 }
 
 /**
  * Given an generated binding, and a range over the generated code, statically
  * evaluate accessed properties within the mapped range to resolve the actual
  * imported value.
  */
-async function mapImportReferenceToDescriptor(binding, mapped) {
-  if (mapped.type !== "ref") {
+async function mapImportReferenceToDescriptor({
+  binding,
+  range
+}) {
+  if (binding.loc.type !== "ref") {
     return null;
   }
 
   // Expression matches require broader searching because sourcemaps usage
   // varies in how they map certain things. For instance given
   //
   //   import { bar } from "mod";
   //   bar();
@@ -34898,31 +34986,31 @@ async function mapImportReferenceToDescr
   // Unfortunately, Webpack also has a tendancy to over-map past the call
   // expression to the start of the next line, at least when there isn't
   // anything else on that line that is mapped, e.g.
   //
   //   Object(foo.bar)()
   //   ^^^^^^^^^^^^^^^^^
   //   ^                 // wrapped to column 0 of next line
 
-  if (!mappingContains(mapped, binding.loc)) {
+  if (!mappingContains(range, binding.loc)) {
     return null;
   }
 
   let expression = binding.name;
   let desc = await binding.desc();
 
   if (binding.loc.type === "ref") {
     const { meta } = binding.loc;
 
     // Limit to 2 simple property or inherits operartions, since it would
     // just be more work to search more and it is very unlikely that
     // bindings would be mapped to more than a single member + inherits
     // wrapper.
-    for (let op = meta, index = 0; op && mappingContains(mapped, op) && desc && index < 2; index++, op = op && op.parent) {
+    for (let op = meta, index = 0; op && mappingContains(range, op) && desc && index < 2; index++, op = op && op.parent) {
       // Calling could potentially trigger side-effects, which would not
       // be ideal for this case.
       if (op.type === "call") {
         return null;
       }
 
       if (op.type === "inherit") {
         continue;
@@ -34993,66 +35081,77 @@ function positionCmp(p1, p2) {
       return 0;
     }
     return l1 < l2 ? -1 : 1;
   }
 
   return p1.line < p2.line ? -1 : 1;
 }
 
-async function getGeneratedLocationRange(pos, source, type, sourceMaps) {
-  const endPosition = await sourceMaps.getGeneratedLocation(pos.end, source);
-  const startPosition = await sourceMaps.getGeneratedLocation(pos.start, source);
-  const ranges = await sourceMaps.getGeneratedRanges(pos.start, source);
-  if (ranges.length === 0) {
-    return null;
-  }
+async function getGeneratedLocationRanges(source, {
+  start,
+  end
+}, bindingType, locationType, sourceMaps) {
+  const endPosition = await sourceMaps.getGeneratedLocation(end, source);
+  const startPosition = await sourceMaps.getGeneratedLocation(start, source);
 
   // If the start and end positions collapse into eachother, it means that
   // the range in the original content didn't _start_ at the start position.
   // Since this likely means that the range doesn't logically apply to this
   // binding location, we skip it.
   if (positionCmp(startPosition, endPosition) === 0) {
-    return null;
-  }
-
-  const start = {
-    line: ranges[0].line,
-    column: ranges[0].columnStart
-  };
-  const end = {
-    line: ranges[0].line,
-    // SourceMapConsumer's 'lastColumn' is inclusive, so we add 1 to make
-    // it exclusive like all other locations.
-    column: ranges[0].columnEnd + 1
-  };
-
-  // Expand the range over any following ranges if they are contiguous.
-  for (let i = 1; i < ranges.length; i++) {
-    const range = ranges[i];
-    if (end.column !== Infinity || range.line !== end.line + 1 || range.columnStart !== 0) {
-      break;
-    }
-    end.line = range.line;
-    end.column = range.columnEnd + 1;
-  }
+    return [];
+  }
+
+  const ranges = await sourceMaps.getGeneratedRanges(start, source);
+
+  const resultRanges = ranges.reduce((acc, mapRange) => {
+    const range = {
+      start: {
+        line: mapRange.line,
+        column: mapRange.columnStart
+      },
+      end: {
+        line: mapRange.line,
+        // SourceMapConsumer's 'lastColumn' is inclusive, so we add 1 to make
+        // it exclusive like all other locations.
+        column: mapRange.columnEnd + 1
+      }
+    };
+
+    const previous = acc[acc.length - 1];
+
+    if (previous && (previous.end.line === range.start.line && previous.end.column === range.start.column || previous.end.line + 1 === range.start.line && previous.end.column === Infinity && range.start.column === 0)) {
+      previous.end.line = range.end.line;
+      previous.end.column = range.end.column;
+    } else {
+      acc.push(range);
+    }
+
+    return acc;
+  }, []);
 
   // When searching for imports, we expand the range to up to the next available
   // mapping to allow for import declarations that are composed of multiple
   // variable statements, where the later ones are entirely unmapped.
   // Babel 6 produces imports in this style, e.g.
   //
   // var _mod = require("mod"); // mapped from import statement
   // var _mod2 = interop(_mod); // entirely unmapped
-  if (type === "import" && pos.type === "decl" && endPosition.line > end.line) {
-    end.line = endPosition.line;
-    end.column = endPosition.column;
-  }
-
-  return { start, end };
+  if (bindingType === "import" && locationType === "decl") {
+    for (const range of resultRanges) {
+      if (mappingContains(range, { start: startPosition, end: startPosition }) && positionCmp(range.end, endPosition) < 0) {
+        range.end.line = endPosition.line;
+        range.end.column = endPosition.column;
+        break;
+      }
+    }
+  }
+
+  return resultRanges;
 }
 
 /***/ }),
 
 /***/ 2359:
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
@@ -38843,17 +38942,17 @@ class FrameworkComponent extends _react.
         dimTopLevelWindow: true,
         createObjectClient: grip => (0, _firefox.createObjectClient)(grip)
       })
     );
   }
 
   render() {
     const { selectedFrame } = this.props;
-    if ((0, _preview.isReactComponent)(selectedFrame.this)) {
+    if (selectedFrame && (0, _preview.isReactComponent)(selectedFrame.this)) {
       return this.renderReactComponent();
     }
 
     return null;
   }
 }
 
 exports.default = (0, _reactRedux.connect)(state => {
@@ -39177,20 +39276,24 @@ function findInsertionLocation(array, ca
       right = mid;
     } else {
       left = mid + 1;
     }
   }
 
   // Ensure the value is the start of any set of matches.
   let i = left;
-  while (i > 0 && callback(array[i]) >= 0) {
-    i--;
-  }
-  return i + 1;
+  if (i < array.length) {
+    while (i > 0 && callback(array[i]) >= 0) {
+      i--;
+    }
+    return i + 1;
+  }
+
+  return i;
 }
 
 function filterSortedArray(array, callback) {
   const start = findInsertionLocation(array, callback);
 
   const results = [];
   for (let i = start; i < array.length && callback(array[i]) === 0; i++) {
     results.push(array[i]);
@@ -39807,16 +39910,50 @@ exports.default = (0, _reactRedux.connec
 
 /***/ 364:
 /***/ (function(module, exports) {
 
 module.exports = "<!-- This Source Code Form is subject to the terms of the Mozilla Public - License, v. 2.0. If a copy of the MPL was not distributed with this - file, You can obtain one at http://mozilla.org/MPL/2.0/. --><svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" viewBox=\"0 0 33 12\"><path id=\"base-path\" d=\"M27.1,0H1C0.4,0,0,0.4,0,1v10c0,0.6,0.4,1,1,1h26.1 c0.6,0,1.2-0.3,1.5-0.7L33,6l-4.4-5.3C28.2,0.3,27.7,0,27.1,0z\"></path></svg>"
 
 /***/ }),
 
+/***/ 3640:
+/***/ (function(module, exports, __webpack_require__) {
+
+"use strict";
+
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.toggleSkipPausing = toggleSkipPausing;
+
+var _selectors = __webpack_require__(3590);
+
+/**
+ * @memberof actions/pause
+ * @static
+ */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+function toggleSkipPausing() {
+  return async ({ dispatch, client, getState, sourceMaps }) => {
+    const skipPausing = !(0, _selectors.getSkipPausing)(getState());
+
+    // NOTE: enable this when we land the endpoint in m-c
+    // await client.setSkipPausing(skipPausing);
+
+    dispatch({ type: "TOGGLE_SKIP_PAUSING", skipPausing });
+  };
+}
+
+/***/ }),
+
 /***/ 365:
 /***/ (function(module, exports) {
 
 module.exports = "<!-- This Source Code Form is subject to the terms of the Mozilla Public - License, v. 2.0. If a copy of the MPL was not distributed with this - file, You can obtain one at http://mozilla.org/MPL/2.0/. --><svg viewBox=\"0 0 16 16\" xmlns=\"http://www.w3.org/2000/svg\"><g fill-rule=\"evenodd\"><path d=\"M1.5 14.042h4.095a.5.5 0 0 0 0-1H1.5a.5.5 0 1 0 0 1zM7.983 2a.5.5 0 0 1 .517.5v7.483l3.136-3.326a.5.5 0 1 1 .728.686l-4 4.243a.499.499 0 0 1-.73-.004L3.635 7.343a.5.5 0 0 1 .728-.686L7.5 9.983V3H1.536C1.24 3 1 2.776 1 2.5s.24-.5.536-.5h6.447zM10.5 14.042h4.095a.5.5 0 0 0 0-1H10.5a.5.5 0 1 0 0 1z\"></path></g></svg>"
 
 /***/ }),
 
 /***/ 366:

--- a/devtools/client/debugger/new/parser-worker.js
+++ b/devtools/client/debugger/new/parser-worker.js
@@ -1317,17 +1317,17 @@ function isAwaitExpression(path) {
 }
 
 function isYieldExpression(path) {
   const { node, parent } = path;
   return t.isYieldExpression(node) || t.isYieldExpression(parent.init) || t.isYieldExpression(parent);
 }
 
 function isObjectShorthand(parent) {
-  return t.isProperty(parent) && parent.key.start == parent.value.start && parent.key.loc.identifierName === parent.value.loc.identifierName;
+  return t.isObjectProperty(parent) && parent.key.start == parent.value.start && parent.key.loc.identifierName === parent.value.loc.identifierName;
 }
 
 function getObjectExpressionValue(node) {
   const { value } = node;
 
   if (t.isIdentifier(value)) {
     return value.name;
   }
@@ -19623,16 +19623,29 @@ const scopeCollectionVisitor = {
       }
 
       freeVariables.push({
         type: "ref",
         start: fromBabelLocation(node.loc.start, state.sourceId),
         end: fromBabelLocation(node.loc.end, state.sourceId),
         meta: buildMetaBindings(state.sourceId, node, ancestors)
       });
+    } else if (isOpeningJSXIdentifier(node, ancestors)) {
+      let freeVariables = state.freeVariables.get(node.name);
+      if (!freeVariables) {
+        freeVariables = [];
+        state.freeVariables.set(node.name, freeVariables);
+      }
+
+      freeVariables.push({
+        type: "ref",
+        start: fromBabelLocation(node.loc.start, state.sourceId),
+        end: fromBabelLocation(node.loc.end, state.sourceId),
+        meta: buildMetaBindings(state.sourceId, node, ancestors)
+      });
     } else if (t.isThisExpression(node)) {
       let freeVariables = state.freeVariables.get("this");
       if (!freeVariables) {
         freeVariables = [];
         state.freeVariables.set("this", freeVariables);
       }
 
       freeVariables.push({
@@ -19699,16 +19712,34 @@ const scopeCollectionVisitor = {
         }
 
         refs.push(...value);
       }
     }
   }
 };
 
+function isOpeningJSXIdentifier(node, ancestors) {
+  if (!t.isJSXIdentifier(node)) {
+    return false;
+  }
+
+  for (let i = ancestors.length - 1; i >= 0; i--) {
+    const { node: parent, key } = ancestors[i];
+
+    if (t.isJSXOpeningElement(parent) && key === "name") {
+      return true;
+    } else if (!t.isJSXMemberExpression(parent) || key !== "object") {
+      break;
+    }
+  }
+
+  return false;
+}
+
 function buildMetaBindings(sourceId, node, ancestors, parentIndex = ancestors.length - 1) {
   if (parentIndex <= 1) {
     return null;
   }
   const parent = ancestors[parentIndex].node;
   const grandparent = ancestors[parentIndex - 1].node;
 
   // Consider "0, foo" to be equivalent to "foo".
@@ -21226,19 +21257,18 @@ function onEnter(node, ancestors, state)
   }
 
   if (isAssignment(node)) {
     // We only want to pause at literal assignments `var a = foo()`
     const value = node.right || node.init;
 
     if (isCall(value) || t.isFunction(parentNode)) {
       return addEmptyPoint(state, startLocation);
-    } else {
-      return addStopPoint(state, startLocation);
-    }
+    }
+    return addStopPoint(state, startLocation);
   }
 
   if (isCall(node)) {
     let location = startLocation;
 
     // When functions are chained, we want to use the property location
     // e.g `foo().bar()`
     if (t.isMemberExpression(node.callee)) {

--- a/devtools/client/debugger/new/test/mochitest/browser.ini
+++ b/devtools/client/debugger/new/test/mochitest/browser.ini
@@ -149,17 +149,16 @@ skip-if = (os == "win" && ccov) # Bug 14
 [browser_dbg-babel-scopes.js]
 skip-if = ccov # Bug 1441545
 [browser_dbg-babel-stepping.js]
 [browser_dbg-babel-preview.js]
 skip-if = (os == "win" && ccov) # Bug 1448523
 [browser_dbg-breaking.js]
 [browser_dbg-breaking-from-console.js]
 [browser_dbg-breakpoints.js]
-[browser_dbg-breakpoints-toggle.js]
 [browser_dbg-breakpoints-reloading.js]
 [browser_dbg-breakpoints-cond.js]
 [browser_dbg-browser-content-toolbox.js]
 skip-if = !e10s # This test is only valid in e10s
 [browser_dbg-call-stack.js]
 [browser_dbg-scopes.js]
 [browser_dbg-chrome-create.js]
 [browser_dbg-chrome-debugging.js]

--- a/devtools/client/debugger/new/test/mochitest/browser_dbg-babel-scopes.js
+++ b/devtools/client/debugger/new/test/mochitest/browser_dbg-babel-scopes.js
@@ -98,17 +98,17 @@ add_task(async function() {
   // No '<this>' binding here because Babel does not currently general
   // the current mappings for 'this' bindings.
   await breakpointScopes(
     dbg,
     "this-arguments-bindings",
     { line: 8, column: 6 },
     [
       "arrow",
-      ["argArrow", "(unmapped)"],
+      ["argArrow", '"arrow-arg"'],
       "Block",
       "arrow()",
       "fn",
       ["arg", '"arg-value"'],
       ["arguments", "Arguments"],
       "root",
       "fn()",
       "Module",
@@ -127,16 +127,17 @@ add_task(async function() {
     ["anAliased2", '"an-original2"'],
     ["anAliased3", '"an-original3"'],
     ["aNamed", '"a-named"'],
     ["aNamed2", '"a-named2"'],
     ["aNamed3", '"a-named3"'],
     ["aNamespace", "{\u2026}"],
     ["aNamespace2", "{\u2026}"],
     ["aNamespace3", "{\u2026}"],
+    ["example", "(optimized away)"],
     ["optimizedOut", "(optimized away)"],
     "root()"
   ]);
 
   await breakpointScopes(dbg, "classes", { line: 12, column: 6 }, [
     "Block",
     ["three", "3"],
     ["two", "2"],
@@ -279,16 +280,17 @@ add_task(async function() {
     ["anAliased2", "Getter"],
     ["anAliased3", "Getter"],
     ["aNamed", "Getter"],
     ["aNamed2", "Getter"],
     ["aNamed3", "Getter"],
     ["aNamespace", "{\u2026}"],
     ["aNamespace2", "{\u2026}"],
     ["aNamespace3", "{\u2026}"],
+    ["example", "(optimized away)"],
     ["optimizedOut", "(optimized away)"],
     "root()"
   ]);
 
   await breakpointScopes(dbg, "webpack-modules-es6", { line: 20, column: 2 }, [
     "Module",
     ["aDefault", '"a-default"'],
     ["aDefault2", '"a-default2"'],
@@ -297,16 +299,17 @@ add_task(async function() {
     ["anAliased2", '"an-original2"'],
     ["anAliased3", '"an-original3"'],
     ["aNamed", '"a-named"'],
     ["aNamed2", '"a-named2"'],
     ["aNamed3", '"a-named3"'],
     ["aNamespace", "{\u2026}"],
     ["aNamespace2", "{\u2026}"],
     ["aNamespace3", "{\u2026}"],
+    ["example", "(optimized away)"],
     ["optimizedOut", "(optimized away)"],
     "root()"
   ]);
 
   await breakpointScopes(dbg, "webpack-standalone", { line: 11, column: 0 }, [
     "Block",
     ["<this>", '"this-value"'],
     ["arg", '"arg-value"'],

deleted file mode 100644
--- a/devtools/client/debugger/new/test/mochitest/browser_dbg-breakpoints-toggle.js
+++ /dev/null
@@ -1,89 +0,0 @@
-function toggleBreakpoint(dbg, index) {
-  const bp = findAllElements(dbg, "breakpointItems")[index];
-  const input = bp.querySelector("input");
-  input.click();
-}
-
-async function removeBreakpoint(dbg, index) {
-  const removed = waitForDispatch(dbg, "REMOVE_BREAKPOINT");
-  const bp = findAllElements(dbg, "breakpointItems")[index];
-  bp.querySelector(".close-btn").click();
-  await removed;
-}
-
-async function disableBreakpoint(dbg, index) {
-  const disabled = waitForDispatch(dbg, "DISABLE_BREAKPOINT");
-  toggleBreakpoint(dbg, index);
-  await disabled;
-}
-
-async function enableBreakpoint(dbg, index) {
-  const enabled = waitForDispatch(dbg, "ENABLE_BREAKPOINT");
-  toggleBreakpoint(dbg, index);
-  await enabled;
-}
-
-function toggleBreakpoints(dbg, count) {
-  clickElement(dbg, "toggleBreakpoints");
-}
-
-function disableBreakpoints(dbg, count) {
-  const toggled = waitForDispatch(dbg, "DISABLE_ALL_BREAKPOINTS", count);
-  toggleBreakpoints(dbg);
-  return toggled;
-}
-
-function enableBreakpoints(dbg, count) {
-  const enabled = waitForDispatch(dbg, "ENABLE_ALL_BREAKPOINTS", count);
-  toggleBreakpoints(dbg);
-  return enabled;
-}
-
-function findBreakpoint(dbg, url, line) {
-  const { selectors: { getBreakpoint }, getState } = dbg;
-  const source = findSource(dbg, url);
-  return getBreakpoint(getState(), { sourceId: source.id, line });
-}
-
-function findBreakpoints(dbg) {
-  const { selectors: { getBreakpoints }, getState } = dbg;
-  return getBreakpoints(getState());
-}
-
-// toggle all breakpoints
-add_task(async function() {
-  const dbg = await initDebugger("doc-scripts.html", "simple2");
-
-  // Create two breakpoints
-  await selectSource(dbg, "simple2");
-  await addBreakpoint(dbg, "simple2", 3);
-  await addBreakpoint(dbg, "simple2", 5);
-
-  // Disable all of the breakpoints
-  await disableBreakpoints(dbg, 1);
-  let bp1 = findBreakpoint(dbg, "simple2", 3);
-  let bp2 = findBreakpoint(dbg, "simple2", 5);
-
-  if (!bp2) {
-    debugger;
-  }
-
-  is(bp1.disabled, true, "first breakpoint is disabled");
-  is(bp2.disabled, true, "second breakpoint is disabled");
-
-  // Enable all of the breakpoints
-  await enableBreakpoints(dbg, 1);
-  bp1 = findBreakpoint(dbg, "simple2", 3);
-  bp2 = findBreakpoint(dbg, "simple2", 5);
-
-  is(bp1.disabled, false, "first breakpoint is enabled");
-  is(bp2.disabled, false, "second breakpoint is enabled");
-
-  // Remove the breakpoints
-  await removeBreakpoint(dbg, 0);
-  await removeBreakpoint(dbg, 0);
-
-  const bps = findBreakpoints(dbg);
-
-  is(bps.size, 0, "breakpoints are removed");
-});

--- a/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/imported-bindings/input.js
+++ b/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/imported-bindings/input.js
@@ -36,8 +36,15 @@ export default function root() {
 
     console.log(new aDefault3());
     console.log(new anAliased3());
     console.log(new aNamed3());
     console.log(new anAliased3());
     console.log(new aNamespace3());
   } catch (e) {}
 }
+
+export function example(){}
+
+// The build harness sets the wrong global, so just override it.
+Promise.resolve().then(() => {
+  window.importedBindings = root;
+});

--- a/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/imported-bindings/output.js
+++ b/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/imported-bindings/output.js
@@ -70,16 +70,17 @@ var importedBindings =
 
 "use strict";
 
 
 Object.defineProperty(exports, "__esModule", {
   value: true
 });
 exports.default = root;
+exports.example = example;
 
 var _mod = __webpack_require__(1);
 
 var _mod2 = _interopRequireDefault(_mod);
 
 var _mod3 = __webpack_require__(2);
 
 var _mod4 = __webpack_require__(3);
@@ -142,17 +143,23 @@ function root() {
 
     console.log(new _mod12.default());
     console.log(new _mod14.original());
     console.log(new _mod13.aNamed3());
     console.log(new _mod14.original());
     console.log(new aNamespace3());
   } catch (e) {}
 }
-module.exports = exports["default"];
+
+function example() {}
+
+// The build harness sets the wrong global, so just override it.
+Promise.resolve().then(function () {
+  window.importedBindings = root;
+});
 
 /***/ }),
 /* 1 */
 /***/ (function(module, exports, __webpack_require__) {
 
 "use strict";
 
 

--- a/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/imported-bindings/output.js.map
+++ b/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/imported-bindings/output.js.map
@@ -1,1 +1,1 @@
-{"version":3,"sources":["webpack:///webpack/bootstrap e0180c76a41bdd7a8eae","webpack:///./fixtures/imported-bindings/input.js","webpack:///./fixtures/imported-bindings/src/mod1.js","webpack:///./fixtures/imported-bindings/src/mod2.js","webpack:///./fixtures/imported-bindings/src/mod3.js","webpack:///./fixtures/imported-bindings/src/mod4.js","webpack:///./fixtures/imported-bindings/src/mod5.js","webpack:///./fixtures/imported-bindings/src/mod6.js","webpack:///./fixtures/imported-bindings/src/mod7.js","webpack:///./fixtures/imported-bindings/src/mod8.js","webpack:///./fixtures/imported-bindings/src/mod9.js","webpack:///./fixtures/imported-bindings/src/mod10.js","webpack:///./fixtures/imported-bindings/src/mod11.js","webpack:///./fixtures/imported-bindings/src/mod12.js","webpack:///./fixtures/imported-bindings/src/optimized-out.js"],"names":["root","aNamespace","aNamespace2","aNamespace3","console","log","e","aNamed","original","aNamed2","aNamed3","optimizedOut"],"mappings":";;AAAA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AAEA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;;;AAGA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,aAAK;AACL;AACA;;AAEA;AACA;AACA;AACA,mCAA2B,0BAA0B,EAAE;AACvD,yCAAiC,eAAe;AAChD;AACA;AACA;;AAEA;AACA,8DAAsD,+DAA+D;;AAErH;AACA;;AAEA;AACA;;;;;;;;;;;;;kBC3CwBA,I;;AAlBxB;;;;AACA;;AACA;;AACA;;IAAYC,U;;AAEZ;;;;AACA;;AACA;;AACA;;IAAYC,W;;AAEZ;;;;AACA;;AACA;;AACA;;IAAYC,W;;AAEZ;;;;;;;;AACA;;AAEe,SAASH,IAAT,GAAgB;AAC7BI,UAAQC,GAAR,CAAY,YAAZ,EAA0BL,IAA1B;;AAEAI,UAAQC,GAAR;AACAD,UAAQC,GAAR;AACAD,UAAQC,GAAR;AACAD,UAAQC,GAAR;AACAD,UAAQC,GAAR,CAAYJ,UAAZ;;AAEA,MAAI;AACF;AACA;AACAG,YAAQC,GAAR,CAAY,oBAAZ;AACAD,YAAQC,GAAR,CAAY,qBAAZ;AACAD,YAAQC,GAAR,CAAY,oBAAZ;AACAD,YAAQC,GAAR,CAAY,qBAAZ;AACAD,YAAQC,GAAR,CAAYH,aAAZ;;AAEAE,YAAQC,GAAR,CAAY,oBAAZ;AACAD,YAAQC,GAAR,CAAY,qBAAZ;AACAD,YAAQC,GAAR,CAAY,oBAAZ;AACAD,YAAQC,GAAR,CAAY,qBAAZ;AACAD,YAAQC,GAAR,CAAY,IAAIF,WAAJ,EAAZ;AACD,GAdD,CAcE,OAAOG,CAAP,EAAU,CAAE;AACf;;;;;;;;;;;;;kBC1Cc,W;;;;;;;;;;;;;ACAR,IAAMC,0BAAS,SAAf,C;;;;;;;;;;;;ACAA,IAAMC,8BAAW,aAAjB,C;;;;;;;;;;;;kBCAQ,W;AACR,IAAMD,0BAAS,SAAf,C;;;;;;;;;;;;kBCDQ,Y;;;;;;;;;;;;;ACAR,IAAME,4BAAU,UAAhB,C;;;;;;;;;;;;ACAA,IAAMD,8BAAW,cAAjB,C;;;;;;;;;;;;kBCAQ,Y;AACR,IAAMD,0BAAS,UAAf,C;;;;;;;;;;;;kBCDQ,Y;;;;;;;;;;;;;ACAR,IAAMG,4BAAU,UAAhB,C;;;;;;;;;;;;ACAA,IAAMF,8BAAW,cAAjB,C;;;;;;;;;;;;kBCAQ,Y;AACR,IAAMD,0BAAS,UAAf,C;;;;;;;;;;;;kBCDiBI,Y;AAAT,SAASA,YAAT,GAAwB,CAAE","file":"fixtures/imported-bindings/output.js","sourcesContent":[" \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, {\n \t\t\t\tconfigurable: false,\n \t\t\t\tenumerable: true,\n \t\t\t\tget: getter\n \t\t\t});\n \t\t}\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; 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\ No newline at end of file
+{"version":3,"sources":["webpack:///webpack/bootstrap 10c0c41335992ab33745","webpack:///./fixtures/imported-bindings/input.js","webpack:///./fixtures/imported-bindings/src/mod1.js","webpack:///./fixtures/imported-bindings/src/mod2.js","webpack:///./fixtures/imported-bindings/src/mod3.js","webpack:///./fixtures/imported-bindings/src/mod4.js","webpack:///./fixtures/imported-bindings/src/mod5.js","webpack:///./fixtures/imported-bindings/src/mod6.js","webpack:///./fixtures/imported-bindings/src/mod7.js","webpack:///./fixtures/imported-bindings/src/mod8.js","webpack:///./fixtures/imported-bindings/src/mod9.js","webpack:///./fixtures/imported-bindings/src/mod10.js","webpack:///./fixtures/imported-bindings/src/mod11.js","webpack:///./fixtures/imported-bindings/src/mod12.js","webpack:///./fixtures/imported-bindings/src/optimized-out.js"],"names":["root","example","aNamespace","aNamespace2","aNamespace3","console","log","e","Promise","resolve","then","window","importedBindings","aNamed","original","aNamed2","aNamed3","optimizedOut"],"mappings":";;AAAA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AAEA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;;;AAGA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,aAAK;AACL;AACA;;AAEA;AACA;AACA;AACA,mCAA2B,0BAA0B,EAAE;AACvD,yCAAiC,eAAe;AAChD;AACA;AACA;;AAEA;AACA,8DAAsD,+DAA+D;;AAErH;AACA;;AAEA;AACA;;;;;;;;;;;;;kBC3CwBA,I;QA0BRC,O,GAAAA,O;;AA5ChB;;;;AACA;;AACA;;AACA;;IAAYC,U;;AAEZ;;;;AACA;;AACA;;AACA;;IAAYC,W;;AAEZ;;;;AACA;;AACA;;AACA;;IAAYC,W;;AAEZ;;;;;;;;AACA;;AAEe,SAASJ,IAAT,GAAgB;AAC7BK,UAAQC,GAAR,CAAY,YAAZ,EAA0BN,IAA1B;;AAEAK,UAAQC,GAAR;AACAD,UAAQC,GAAR;AACAD,UAAQC,GAAR;AACAD,UAAQC,GAAR;AACAD,UAAQC,GAAR,CAAYJ,UAAZ;;AAEA,MAAI;AACF;AACA;AACAG,YAAQC,GAAR,CAAY,oBAAZ;AACAD,YAAQC,GAAR,CAAY,qBAAZ;AACAD,YAAQC,GAAR,CAAY,oBAAZ;AACAD,YAAQC,GAAR,CAAY,qBAAZ;AACAD,YAAQC,GAAR,CAAYH,aAAZ;;AAEAE,YAAQC,GAAR,CAAY,oBAAZ;AACAD,YAAQC,GAAR,CAAY,qBAAZ;AACAD,YAAQC,GAAR,CAAY,oBAAZ;AACAD,YAAQC,GAAR,CAAY,qBAAZ;AACAD,YAAQC,GAAR,CAAY,IAAIF,WAAJ,EAAZ;AACD,GAdD,CAcE,OAAOG,CAAP,EAAU,CAAE;AACf;;AAEM,SAASN,OAAT,GAAkB,CAAE;;AAE3B;AACAO,QAAQC,OAAR,GAAkBC,IAAlB,CAAuB,YAAM;AAC3BC,SAAOC,gBAAP,GAA0BZ,IAA1B;AACD,CAFD,E;;;;;;;;;;;;kBC/Ce,W;;;;;;;;;;;;;ACAR,IAAMa,0BAAS,SAAf,C;;;;;;;;;;;;ACAA,IAAMC,8BAAW,aAAjB,C;;;;;;;;;;;;kBCAQ,W;AACR,IAAMD,0BAAS,SAAf,C;;;;;;;;;;;;kBCDQ,Y;;;;;;;;;;;;;ACAR,IAAME,4BAAU,UAAhB,C;;;;;;;;;;;;ACAA,IAAMD,8BAAW,cAAjB,C;;;;;;;;;;;;kBCAQ,Y;AACR,IAAMD,0BAAS,UAAf,C;;;;;;;;;;;;kBCDQ,Y;;;;;;;;;;;;;ACAR,IAAMG,4BAAU,UAAhB,C;;;;;;;;;;;;ACAA,IAAMF,8BAAW,cAAjB,C;;;;;;;;;;;;kBCAQ,Y;AACR,IAAMD,0BAAS,UAAf,C;;;;;;;;;;;;kBCDiBI,Y;AAAT,SAASA,YAAT,GAAwB,CAAE","file":"fixtures/imported-bindings/output.js","sourcesContent":[" \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, {\n \t\t\t\tconfigurable: false,\n \t\t\t\tenumerable: true,\n \t\t\t\tget: getter\n \t\t\t});\n \t\t}\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 0);\n\n\n\n// WEBPACK FOOTER //\n// webpack/bootstrap 10c0c41335992ab33745","import aDefault from \"./src/mod1\";\nimport { aNamed } from \"./src/mod2\";\nimport { original as anAliased } from \"./src/mod3\";\nimport * as aNamespace from \"./src/mod4\";\n\nimport aDefault2 from \"./src/mod5\";\nimport { aNamed2 } from \"./src/mod6\";\nimport { original as anAliased2 } from \"./src/mod7\";\nimport * as aNamespace2 from \"./src/mod8\";\n\nimport aDefault3 from \"./src/mod9\";\nimport { aNamed3 } from \"./src/mod10\";\nimport { original as anAliased3 } from \"./src/mod11\";\nimport * as aNamespace3 from \"./src/mod12\";\n\nimport optimizedOut from \"./src/optimized-out\";\noptimizedOut();\n\nexport default function root() {\n  console.log(\"pause here\", root);\n\n  console.log(aDefault);\n  console.log(anAliased);\n  console.log(aNamed);\n  console.log(anAliased);\n  console.log(aNamespace);\n\n  try {\n    // None of these are callable in this code, but we still want to make sure\n    // they map properly even if the only reference is in a call expressions.\n    console.log(aDefault2());\n    console.log(anAliased2());\n    console.log(aNamed2());\n    console.log(anAliased2());\n    console.log(aNamespace2());\n\n    console.log(new aDefault3());\n    console.log(new anAliased3());\n    console.log(new aNamed3());\n    console.log(new anAliased3());\n    console.log(new aNamespace3());\n  } catch (e) {}\n}\n\nexport function example(){}\n\n// The build harness sets the wrong global, so just override it.\nPromise.resolve().then(() => {\n  window.importedBindings = root;\n});\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/input.js","export default \"a-default\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod1.js","export const aNamed = \"a-named\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod2.js","export const original = \"an-original\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod3.js","export default \"a-default\";\nexport const aNamed = \"a-named\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod4.js","export default \"a-default2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod5.js","export const aNamed2 = \"a-named2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod6.js","export const original = \"an-original2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod7.js","export default \"a-default2\";\nexport const aNamed = \"a-named2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod8.js","export default \"a-default3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod9.js","export const aNamed3 = \"a-named3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod10.js","export const original = \"an-original3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod11.js","export default \"a-default3\";\nexport const aNamed = \"a-named3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/mod12.js","export default function optimizedOut() {}\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/imported-bindings/src/optimized-out.js"],"sourceRoot":""}
\ No newline at end of file

--- a/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules-es6/input.js
+++ b/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules-es6/input.js
@@ -37,12 +37,14 @@ export default function root() {
     console.log(new aDefault3());
     console.log(new anAliased3());
     console.log(new aNamed3());
     console.log(new anAliased3());
     console.log(new aNamespace3());
   } catch (e) {}
 }
 
+export function example(){}
+
 // The build harness sets the wrong global, so just override it.
 Promise.resolve().then(() => {
   window.webpackModulesEs6 = root;
 });

--- a/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules-es6/output.js
+++ b/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules-es6/output.js
@@ -66,16 +66,17 @@ var webpackModulesEs6 =
 /************************************************************************/
 /******/ ([
 /* 0 */
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
 "use strict";
 Object.defineProperty(__webpack_exports__, "__esModule", { value: true });
 /* harmony export (immutable) */ __webpack_exports__["default"] = root;
+/* harmony export (immutable) */ __webpack_exports__["example"] = example;
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_0__src_mod1__ = __webpack_require__(1);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_1__src_mod2__ = __webpack_require__(2);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_2__src_mod3__ = __webpack_require__(3);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_3__src_mod4__ = __webpack_require__(4);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_4__src_mod5__ = __webpack_require__(5);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_5__src_mod6__ = __webpack_require__(6);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_6__src_mod7__ = __webpack_require__(7);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_7__src_mod8__ = __webpack_require__(8);
@@ -123,16 +124,18 @@ function root() {
     console.log(new __WEBPACK_IMPORTED_MODULE_8__src_mod9__["a" /* default */]());
     console.log(new __WEBPACK_IMPORTED_MODULE_10__src_mod11__["a" /* original */]());
     console.log(new __WEBPACK_IMPORTED_MODULE_9__src_mod10__["a" /* aNamed3 */]());
     console.log(new __WEBPACK_IMPORTED_MODULE_10__src_mod11__["a" /* original */]());
     console.log(new __WEBPACK_IMPORTED_MODULE_11__src_mod12__());
   } catch (e) {}
 }
 
+function example() {}
+
 // The build harness sets the wrong global, so just override it.
 Promise.resolve().then(() => {
   window.webpackModulesEs6 = root;
 });
 
 /***/ }),
 /* 1 */
 /***/ (function(module, __webpack_exports__, __webpack_require__) {

--- a/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules-es6/output.js.map
+++ b/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules-es6/output.js.map
@@ -1,1 +1,1 @@
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\ No newline at end of file
+{"version":3,"sources":["webpack:///webpack/bootstrap ce5a3febd2184465bc3b","webpack:///./fixtures/webpack-modules-es6/input.js","webpack:///./fixtures/webpack-modules-es6/src/mod1.js","webpack:///./fixtures/webpack-modules-es6/src/mod2.js","webpack:///./fixtures/webpack-modules-es6/src/mod3.js","webpack:///./fixtures/webpack-modules-es6/src/mod4.js","webpack:///./fixtures/webpack-modules-es6/src/mod5.js","webpack:///./fixtures/webpack-modules-es6/src/mod6.js","webpack:///./fixtures/webpack-modules-es6/src/mod7.js","webpack:///./fixtures/webpack-modules-es6/src/mod8.js","webpack:///./fixtures/webpack-modules-es6/src/mod9.js","webpack:///./fixtures/webpack-modules-es6/src/mod10.js","webpack:///./fixtures/webpack-modules-es6/src/mod11.js","webpack:///./fixtures/webpack-modules-es6/src/mod12.js","webpack:///./fixtures/webpack-modules-es6/src/optimized-out.js"],"names":["optimizedOut","root","console","log","aDefault2","anAliased2","aNamed2","aNamespace2","e","example","Promise","resolve","then","window","webpackModulesEs6","aNamed","original","aNamed3"],"mappings":";;AAAA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AAEA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;;;AAGA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,aAAK;AACL;AACA;;AAEA;AACA;AACA;AACA,mCAA2B,0BAA0B,EAAE;AACvD,yCAAiC,eAAe;AAChD;AACA;AACA;;AAEA;AACA,8DAAsD,+DAA+D;;AAErH;AACA;;AAEA;AACA;;;;;;;;;;;;;;;;;;;;;;;;AC7DA;AACA;AACA;AACA;;AAEA;AACA;AACA;AACA;;AAEA;AACA;AACA;AACA;;AAEA;AACA,4EAAAA;;AAEe,SAASC,IAAT,GAAgB;AAC7BC,UAAQC,GAAR,CAAY,YAAZ,EAA0BF,IAA1B;;AAEAC,UAAQC,GAAR,CAAY,0DAAZ;AACAD,UAAQC,GAAR,CAAY,2DAAZ;AACAD,UAAQC,GAAR,CAAY,yDAAZ;AACAD,UAAQC,GAAR,CAAY,2DAAZ;AACAD,UAAQC,GAAR,CAAY,uCAAZ;;AAEA,MAAI;AACF;AACA;AACAD,YAAQC,GAAR,CAAY,kEAAAC,EAAZ;AACAF,YAAQC,GAAR,CAAY,mEAAAE,EAAZ;AACAH,YAAQC,GAAR,CAAY,kEAAAG,EAAZ;AACAJ,YAAQC,GAAR,CAAY,mEAAAE,EAAZ;AACAH,YAAQC,GAAR,CAAY,uCAAAI,EAAZ;;AAEAL,YAAQC,GAAR,CAAY,IAAI,0DAAJ,EAAZ;AACAD,YAAQC,GAAR,CAAY,IAAI,6DAAJ,EAAZ;AACAD,YAAQC,GAAR,CAAY,IAAI,2DAAJ,EAAZ;AACAD,YAAQC,GAAR,CAAY,IAAI,6DAAJ,EAAZ;AACAD,YAAQC,GAAR,CAAY,IAAI,yCAAJ,EAAZ;AACD,GAdD,CAcE,OAAOK,CAAP,EAAU,CAAE;AACf;;AAEM,SAASC,OAAT,GAAkB,CAAE;;AAE3B;AACAC,QAAQC,OAAR,GAAkBC,IAAlB,CAAuB,MAAM;AAC3BC,SAAOC,iBAAP,GAA2Bb,IAA3B;AACD,CAFD,E;;;;;;;AC/CA,yDAAe,WAAf,E;;;;;;;ACAO,MAAMc,SAAS,SAAf,C;;;;;;;;;ACAA,MAAMC,WAAW,aAAjB,C;;;;;;;;;;ACAP,+DAAe,WAAf;AACO,MAAMD,SAAS,SAAf,C;;;;;;;;;ACDP,yDAAe,YAAf,E;;;;;;;ACAO,MAAMT,UAAU,UAAhB,C;;;;;;;;;ACAA,MAAMU,WAAW,cAAjB,C;;;;;;;;;;ACAP,+DAAe,YAAf;AACO,MAAMD,SAAS,UAAf,C;;;;;;;;;ACDP,yDAAe,YAAf,E;;;;;;;ACAO,MAAME,UAAU,UAAhB,C;;;;;;;;;ACAA,MAAMD,WAAW,cAAjB,C;;;;;;;;;;ACAP,+DAAe,YAAf;AACO,MAAMD,SAAS,UAAf,C;;;;;;;;;;ACDQ,SAASf,YAAT,GAAwB,CAAE,C","file":"fixtures/webpack-modules-es6/output.js","sourcesContent":[" \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, {\n \t\t\t\tconfigurable: false,\n \t\t\t\tenumerable: true,\n \t\t\t\tget: getter\n \t\t\t});\n \t\t}\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 0);\n\n\n\n// WEBPACK FOOTER //\n// webpack/bootstrap ce5a3febd2184465bc3b","import aDefault from \"./src/mod1\";\nimport { aNamed } from \"./src/mod2\";\nimport { original as anAliased } from \"./src/mod3\";\nimport * as aNamespace from \"./src/mod4\";\n\nimport aDefault2 from \"./src/mod5\";\nimport { aNamed2 } from \"./src/mod6\";\nimport { original as anAliased2 } from \"./src/mod7\";\nimport * as aNamespace2 from \"./src/mod8\";\n\nimport aDefault3 from \"./src/mod9\";\nimport { aNamed3 } from \"./src/mod10\";\nimport { original as anAliased3 } from \"./src/mod11\";\nimport * as aNamespace3 from \"./src/mod12\";\n\nimport optimizedOut from \"./src/optimized-out\";\noptimizedOut();\n\nexport default function root() {\n  console.log(\"pause here\", root);\n\n  console.log(aDefault);\n  console.log(anAliased);\n  console.log(aNamed);\n  console.log(anAliased);\n  console.log(aNamespace);\n\n  try {\n    // None of these are callable in this code, but we still want to make sure\n    // they map properly even if the only reference is in a call expressions.\n    console.log(aDefault2());\n    console.log(anAliased2());\n    console.log(aNamed2());\n    console.log(anAliased2());\n    console.log(aNamespace2());\n\n    console.log(new aDefault3());\n    console.log(new anAliased3());\n    console.log(new aNamed3());\n    console.log(new anAliased3());\n    console.log(new aNamespace3());\n  } catch (e) {}\n}\n\nexport function example(){}\n\n// The build harness sets the wrong global, so just override it.\nPromise.resolve().then(() => {\n  window.webpackModulesEs6 = root;\n});\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/input.js","export default \"a-default\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod1.js","export const aNamed = \"a-named\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod2.js","export const original = \"an-original\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod3.js","export default \"a-default\";\nexport const aNamed = \"a-named\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod4.js","export default \"a-default2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod5.js","export const aNamed2 = \"a-named2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod6.js","export const original = \"an-original2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod7.js","export default \"a-default2\";\nexport const aNamed = \"a-named2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod8.js","export default \"a-default3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod9.js","export const aNamed3 = \"a-named3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod10.js","export const original = \"an-original3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod11.js","export default \"a-default3\";\nexport const aNamed = \"a-named3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/mod12.js","export default function optimizedOut() {}\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules-es6/src/optimized-out.js"],"sourceRoot":""}
\ No newline at end of file

--- a/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules/input.js
+++ b/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules/input.js
@@ -37,12 +37,14 @@ export default function root() {
     console.log(new aDefault3());
     console.log(new anAliased3());
     console.log(new aNamed3());
     console.log(new anAliased3());
     console.log(new aNamespace3());
   } catch (e) {}
 }
 
+export function example(){}
+
 // The build harness sets the wrong global, so just override it.
 Promise.resolve().then(() => {
   window.webpackModules = root;
 });

--- a/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules/output.js
+++ b/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules/output.js
@@ -66,16 +66,17 @@ var webpackModules =
 /************************************************************************/
 /******/ ([
 /* 0 */
 /***/ (function(module, __webpack_exports__, __webpack_require__) {
 
 "use strict";
 Object.defineProperty(__webpack_exports__, "__esModule", { value: true });
 /* harmony export (immutable) */ __webpack_exports__["default"] = root;
+/* harmony export (immutable) */ __webpack_exports__["example"] = example;
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_0__src_mod1__ = __webpack_require__(1);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_1__src_mod2__ = __webpack_require__(2);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_2__src_mod3__ = __webpack_require__(3);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_3__src_mod4__ = __webpack_require__(4);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_4__src_mod5__ = __webpack_require__(5);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_5__src_mod6__ = __webpack_require__(6);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_6__src_mod7__ = __webpack_require__(7);
 /* harmony import */ var __WEBPACK_IMPORTED_MODULE_7__src_mod8__ = __webpack_require__(8);
@@ -123,16 +124,18 @@ function root() {
     console.log(new __WEBPACK_IMPORTED_MODULE_8__src_mod9__["a" /* default */]());
     console.log(new __WEBPACK_IMPORTED_MODULE_10__src_mod11__["a" /* original */]());
     console.log(new __WEBPACK_IMPORTED_MODULE_9__src_mod10__["a" /* aNamed3 */]());
     console.log(new __WEBPACK_IMPORTED_MODULE_10__src_mod11__["a" /* original */]());
     console.log(new __WEBPACK_IMPORTED_MODULE_11__src_mod12__());
   } catch (e) {}
 }
 
+function example() {}
+
 // The build harness sets the wrong global, so just override it.
 Promise.resolve().then(function () {
   window.webpackModules = root;
 });
 
 /***/ }),
 /* 1 */
 /***/ (function(module, __webpack_exports__, __webpack_require__) {

--- a/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules/output.js.map
+++ b/devtools/client/debugger/new/test/mochitest/examples/babel/fixtures/webpack-modules/output.js.map
@@ -1,1 +1,1 @@
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} :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 0);\n\n\n\n// WEBPACK FOOTER //\n// webpack/bootstrap 597c2efe7e8569674750","import aDefault from \"./src/mod1\";\nimport { aNamed } from \"./src/mod2\";\nimport { original as anAliased } from \"./src/mod3\";\nimport * as aNamespace from \"./src/mod4\";\n\nimport aDefault2 from \"./src/mod5\";\nimport { aNamed2 } from \"./src/mod6\";\nimport { original as anAliased2 } from \"./src/mod7\";\nimport * as aNamespace2 from \"./src/mod8\";\n\nimport aDefault3 from \"./src/mod9\";\nimport { aNamed3 } from \"./src/mod10\";\nimport { original as anAliased3 } from \"./src/mod11\";\nimport * as aNamespace3 from \"./src/mod12\";\n\nimport optimizedOut from \"./src/optimized-out\";\noptimizedOut();\n\nexport default function root() {\n  console.log(\"pause here\", root);\n\n  console.log(aDefault);\n  console.log(anAliased);\n  console.log(aNamed);\n  console.log(anAliased);\n  console.log(aNamespace);\n\n  try {\n    // None of these are callable in this code, but we still want to make sure\n    // they map properly even if the only reference is in a call expressions.\n    console.log(aDefault2());\n    console.log(anAliased2());\n    console.log(aNamed2());\n    console.log(anAliased2());\n    console.log(aNamespace2());\n\n    console.log(new aDefault3());\n    console.log(new anAliased3());\n    console.log(new aNamed3());\n    console.log(new anAliased3());\n    console.log(new aNamespace3());\n  } catch (e) {}\n}\n\n// The build harness sets the wrong global, so just override it.\nPromise.resolve().then(() => {\n  window.webpackModules = root;\n});\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/input.js","export default \"a-default\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod1.js","export const aNamed = \"a-named\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod2.js","export const original = \"an-original\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod3.js","export default \"a-default\";\nexport const aNamed = \"a-named\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod4.js","export default \"a-default2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod5.js","export const aNamed2 = \"a-named2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod6.js","export const original = \"an-original2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod7.js","export default \"a-default2\";\nexport const aNamed = \"a-named2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod8.js","export default \"a-default3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod9.js","export const aNamed3 = \"a-named3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod10.js","export const original = \"an-original3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod11.js","export default \"a-default3\";\nexport const aNamed = \"a-named3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod12.js","export default function optimizedOut() {}\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/optimized-out.js"],"sourceRoot":""}
\ No newline at end of file
+{"version":3,"sources":["webpack:///webpack/bootstrap bc0f05c10dc0e0831af0","webpack:///./fixtures/webpack-modules/input.js","webpack:///./fixtures/webpack-modules/src/mod1.js","webpack:///./fixtures/webpack-modules/src/mod2.js","webpack:///./fixtures/webpack-modules/src/mod3.js","webpack:///./fixtures/webpack-modules/src/mod4.js","webpack:///./fixtures/webpack-modules/src/mod5.js","webpack:///./fixtures/webpack-modules/src/mod6.js","webpack:///./fixtures/webpack-modules/src/mod7.js","webpack:///./fixtures/webpack-modules/src/mod8.js","webpack:///./fixtures/webpack-modules/src/mod9.js","webpack:///./fixtures/webpack-modules/src/mod10.js","webpack:///./fixtures/webpack-modules/src/mod11.js","webpack:///./fixtures/webpack-modules/src/mod12.js","webpack:///./fixtures/webpack-modules/src/optimized-out.js"],"names":["optimizedOut","root","console","log","aDefault2","anAliased2","aNamed2","aNamespace2","e","example","Promise","resolve","then","window","webpackModules","aNamed","original","aNamed3"],"mappings":";;AAAA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;;AAEA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;;;AAGA;AACA;;AAEA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,aAAK;AACL;AACA;;AAEA;AACA;AACA;AACA,mCAA2B,0BAA0B,EAAE;AACvD,yCAAiC,eAAe;AAChD;AACA;AACA;;AAEA;AACA,8DAAsD,+DAA+D;;AAErH;AACA;;AAEA;AACA;;;;;;;;;;;;;;;;;;;;;;;;AC7DA;AACA;AACA;AACA;;AAEA;AACA;AACA;AACA;;AAEA;AACA;AACA;AACA;;AAEA;AACA,4EAAAA;;AAEe,SAASC,IAAT,GAAgB;AAC7BC,UAAQC,GAAR,CAAY,YAAZ,EAA0BF,IAA1B;;AAEAC,UAAQC,GAAR,CAAY,0DAAZ;AACAD,UAAQC,GAAR,CAAY,2DAAZ;AACAD,UAAQC,GAAR,CAAY,yDAAZ;AACAD,UAAQC,GAAR,CAAY,2DAAZ;AACAD,UAAQC,GAAR,CAAY,uCAAZ;;AAEA,MAAI;AACF;AACA;AACAD,YAAQC,GAAR,CAAY,kEAAAC,EAAZ;AACAF,YAAQC,GAAR,CAAY,mEAAAE,EAAZ;AACAH,YAAQC,GAAR,CAAY,kEAAAG,EAAZ;AACAJ,YAAQC,GAAR,CAAY,mEAAAE,EAAZ;AACAH,YAAQC,GAAR,CAAY,uCAAAI,EAAZ;;AAEAL,YAAQC,GAAR,CAAY,IAAI,0DAAJ,EAAZ;AACAD,YAAQC,GAAR,CAAY,IAAI,6DAAJ,EAAZ;AACAD,YAAQC,GAAR,CAAY,IAAI,2DAAJ,EAAZ;AACAD,YAAQC,GAAR,CAAY,IAAI,6DAAJ,EAAZ;AACAD,YAAQC,GAAR,CAAY,IAAI,yCAAJ,EAAZ;AACD,GAdD,CAcE,OAAOK,CAAP,EAAU,CAAE;AACf;;AAEM,SAASC,OAAT,GAAkB,CAAE;;AAE3B;AACAC,QAAQC,OAAR,GAAkBC,IAAlB,CAAuB,YAAM;AAC3BC,SAAOC,cAAP,GAAwBb,IAAxB;AACD,CAFD,E;;;;;;;AC/CA,yDAAe,WAAf,E;;;;;;;;ACAO,IAAMc,SAAS,SAAf,C;;;;;;;;ACAA,IAAMC,WAAW,aAAjB,C;;;;;;;;;ACAP,+DAAe,WAAf;AACO,IAAMD,SAAS,SAAf,C;;;;;;;ACDP,yDAAe,YAAf,E;;;;;;;;ACAO,IAAMT,UAAU,UAAhB,C;;;;;;;;ACAA,IAAMU,WAAW,cAAjB,C;;;;;;;;;ACAP,+DAAe,YAAf;AACO,IAAMD,SAAS,UAAf,C;;;;;;;ACDP,yDAAe,YAAf,E;;;;;;;;ACAO,IAAME,UAAU,UAAhB,C;;;;;;;;ACAA,IAAMD,WAAW,cAAjB,C;;;;;;;;;ACAP,+DAAe,YAAf;AACO,IAAMD,SAAS,UAAf,C;;;;;;;;ACDQ,SAASf,YAAT,GAAwB,CAAE,C","file":"fixtures/webpack-modules/output.js","sourcesContent":[" \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, {\n \t\t\t\tconfigurable: false,\n \t\t\t\tenumerable: true,\n \t\t\t\tget: getter\n \t\t\t});\n \t\t}\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 0);\n\n\n\n// WEBPACK FOOTER //\n// webpack/bootstrap bc0f05c10dc0e0831af0","import aDefault from \"./src/mod1\";\nimport { aNamed } from \"./src/mod2\";\nimport { original as anAliased } from \"./src/mod3\";\nimport * as aNamespace from \"./src/mod4\";\n\nimport aDefault2 from \"./src/mod5\";\nimport { aNamed2 } from \"./src/mod6\";\nimport { original as anAliased2 } from \"./src/mod7\";\nimport * as aNamespace2 from \"./src/mod8\";\n\nimport aDefault3 from \"./src/mod9\";\nimport { aNamed3 } from \"./src/mod10\";\nimport { original as anAliased3 } from \"./src/mod11\";\nimport * as aNamespace3 from \"./src/mod12\";\n\nimport optimizedOut from \"./src/optimized-out\";\noptimizedOut();\n\nexport default function root() {\n  console.log(\"pause here\", root);\n\n  console.log(aDefault);\n  console.log(anAliased);\n  console.log(aNamed);\n  console.log(anAliased);\n  console.log(aNamespace);\n\n  try {\n    // None of these are callable in this code, but we still want to make sure\n    // they map properly even if the only reference is in a call expressions.\n    console.log(aDefault2());\n    console.log(anAliased2());\n    console.log(aNamed2());\n    console.log(anAliased2());\n    console.log(aNamespace2());\n\n    console.log(new aDefault3());\n    console.log(new anAliased3());\n    console.log(new aNamed3());\n    console.log(new anAliased3());\n    console.log(new aNamespace3());\n  } catch (e) {}\n}\n\nexport function example(){}\n\n// The build harness sets the wrong global, so just override it.\nPromise.resolve().then(() => {\n  window.webpackModules = root;\n});\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/input.js","export default \"a-default\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod1.js","export const aNamed = \"a-named\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod2.js","export const original = \"an-original\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod3.js","export default \"a-default\";\nexport const aNamed = \"a-named\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod4.js","export default \"a-default2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod5.js","export const aNamed2 = \"a-named2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod6.js","export const original = \"an-original2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod7.js","export default \"a-default2\";\nexport const aNamed = \"a-named2\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod8.js","export default \"a-default3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod9.js","export const aNamed3 = \"a-named3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod10.js","export const original = \"an-original3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod11.js","export default \"a-default3\";\nexport const aNamed = \"a-named3\";\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/mod12.js","export default function optimizedOut() {}\n\n\n\n// WEBPACK FOOTER //\n// ./fixtures/webpack-modules/src/optimized-out.js"],"sourceRoot":""}
\ No newline at end of file

--- a/devtools/client/debugger/new/test/mochitest/examples/babel/webpack.config.js
+++ b/devtools/client/debugger/new/test/mochitest/examples/babel/webpack.config.js
@@ -1,24 +1,26 @@
 const fs = require("fs");
 const path = require("path");
 const _ = require("lodash");
 
 const fixtures = path.join(__dirname, "fixtures");
 
 const tests = fs.readdirSync(fixtures).map(name => {
+  if (name[0] === ".") return;
+
   const dirname = path.relative(__dirname, path.join(fixtures, name));
 
   return {
     name: _.camelCase(name),
     dirname,
     input: `./${path.join(dirname, "input.js")}`,
     output: path.join(dirname, "output.js")
   };
-});
+}).filter(Boolean);
 
 const html = path.join(__dirname, "..", "doc-babel.html");
 
 fs.writeFileSync(
   html,
   fs.readFileSync(html, "utf8").replace(
     /\n\s*<!-- INJECTED-START[\s\S]*INJECTED-END -->\n/,
     `

--- a/devtools/client/jar.mn
+++ b/devtools/client/jar.mn
@@ -267,16 +267,17 @@ devtools.jar:
 
     # Debugger
     skin/images/debugger/arrow.svg (themes/images/debugger/arrow.svg)
     skin/images/debugger/back.svg (themes/images/debugger/back.svg)
     skin/images/debugger/blackBox.svg (themes/images/debugger/blackBox.svg)
     skin/images/debugger/breakpoint.svg (themes/images/debugger/breakpoint.svg)
     skin/images/debugger/close.svg (themes/images/debugger/close.svg)
     skin/images/debugger/coffeescript.svg (themes/images/debugger/coffeescript.svg)
+    skin/images/debugger/disable-pausing.svg (themes/images/debugger/disable-pausing.svg)
     skin/images/debugger/domain.svg (themes/images/debugger/domain.svg)
     skin/images/debugger/extension.svg (themes/images/debugger/extension.svg)
     skin/images/debugger/file.svg (themes/images/debugger/file.svg)
     skin/images/debugger/folder.svg (themes/images/debugger/folder.svg)
     skin/images/debugger/forward.svg (themes/images/debugger/forward.svg)
     skin/images/debugger/javascript.svg (themes/images/debugger/javascript.svg)
     skin/images/debugger/pause.svg (themes/images/debugger/pause.svg)
     skin/images/debugger/prettyPrint.svg (themes/images/debugger/prettyPrint.svg)

--- a/devtools/client/locales/en-US/debugger.properties
+++ b/devtools/client/locales/en-US/debugger.properties
@@ -76,16 +76,20 @@ stepOverTooltip=Step over %S
 # LOCALIZATION NOTE (stepInTooltip): The label that is displayed on the
 # button that steps into a function call.
 stepInTooltip=Step in %S
 
 # LOCALIZATION NOTE (stepOutTooltip): The label that is displayed on the
 # button that steps out of a function call.
 stepOutTooltip=Step out %S
 
+# LOCALIZATION NOTE (skipPausingTooltip): The tooltip text for disabling all
+# breakpoints and pausing triggers
+skipPausingTooltip=Skip all pausing
+
 # LOCALIZATION NOTE (pauseButtonItem): The label that is displayed for the dropdown pause
 # list item when the debugger is in a running state.
 pauseButtonItem=Pause on Next Statement
 
 # LOCALIZATION NOTE (ignoreExceptionsItem): The pause on exceptions button description
 # when the debugger will not pause on exceptions.
 ignoreExceptionsItem=Ignore exceptions
 

--- a/devtools/client/preferences/debugger.js
+++ b/devtools/client/preferences/debugger.js
@@ -39,26 +39,28 @@ pref("devtools.debugger.end-panel-collap
 pref("devtools.debugger.tabs", "[]");
 pref("devtools.debugger.tabsBlackBoxed", "[]");
 pref("devtools.debugger.pending-selected-location", "{}");
 pref("devtools.debugger.pending-breakpoints", "{}");
 pref("devtools.debugger.expressions", "[]");
 pref("devtools.debugger.file-search-case-sensitive", false);
 pref("devtools.debugger.file-search-whole-word", false);
 pref("devtools.debugger.file-search-regex-match", false);
-pref("devtools.debugger.features.async-stepping", true);
 pref("devtools.debugger.project-directory-root", "");
+pref("devtools.debugger.skip-pausing", false);
 
 pref("devtools.debugger.features.wasm", true);
 pref("devtools.debugger.features.shortcuts", true);
 pref("devtools.debugger.features.root", true);
 pref("devtools.debugger.features.column-breakpoints", false);
 pref("devtools.debugger.features.chrome-scopes", false);
 pref("devtools.debugger.features.map-scopes", true);
 pref("devtools.debugger.features.remove-command-bar-options", false);
 pref("devtools.debugger.features.workers", true);
 pref("devtools.debugger.features.code-coverage", false);
 pref("devtools.debugger.features.event-listeners", false);
 pref("devtools.debugger.features.code-folding", false);
 pref("devtools.debugger.features.outline", true);
 pref("devtools.debugger.features.replay", false);
 pref("devtools.debugger.features.pause-points", true);
 pref("devtools.debugger.features.component-stack", false);
+pref("devtools.debugger.features.async-stepping", true);
+pref("devtools.debugger.features.skip-pausing", false);

new file mode 100644
--- /dev/null
+++ b/devtools/client/themes/images/debugger/disable-pausing.svg
@@ -0,0 +1,1 @@
+<svg height="16" viewBox="0 0 15 16" width="15" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd" transform="translate(0 1)"><path d="m1.5 13.5 10-13" stroke="#000" stroke-linecap="square"/><path d="m7.58013626 3-.75408823 1h-4.82604803c-.53612439 0-.77556634.12770238-.9020017.32999894-.07178403.11485445-.0979983.24068295-.0979983.27000106v4.8c0 .02931811.02621427.15514661.0979983.27000106.12643536.20229656.36587731.32999894.9020017.32999894h.30151865l-.73328118.9724077c-1.56823747-.2118785-1.56823747-1.5724077-1.56823747-1.5724077v-4.8s0-1.6 2-1.6zm3.94638894.52652517 3.4734748 3.47347483-4 4h-5.10913424l.75408823-1h3.94083241l3-3-2.6672362-2.66723627z" fill="#000" fill-rule="nonzero"/></g></svg>
\ No newline at end of file

--- a/dom/base/nsFocusManager.cpp
+++ b/dom/base/nsFocusManager.cpp
@@ -3214,16 +3214,34 @@ nsFocusManager::FindOwner(nsIContent* aC
 
 bool
 nsFocusManager::IsHostOrSlot(nsIContent* aContent)
 {
   return aContent->GetShadowRoot() || // shadow host
          aContent->IsHTMLElement(nsGkAtoms::slot); // slot
 }
 
+int32_t
+nsFocusManager::HostOrSlotTabIndexValue(nsIContent* aContent)
+{
+  MOZ_ASSERT(IsHostOrSlot(aContent));
+
+  const nsAttrValue* attrVal =
+    aContent->AsElement()->GetParsedAttr(nsGkAtoms::tabindex);
+  if (!attrVal) {
+    return 0;
+  }
+
+  if (attrVal->Type() == nsAttrValue::eInteger) {
+    return attrVal->GetIntegerValue();
+  }
+
+  return -1;
+}
+
 nsIContent*
 nsFocusManager::GetNextTabbableContentInScope(nsIContent* aOwner,
                                               nsIContent* aStartContent,
                                               bool aForward,
                                               int32_t aCurrentTabIndex,
                                               bool aIgnoreTabIndex,
                                               bool aSkipOwner)
 {
@@ -3325,17 +3343,17 @@ nsFocusManager::GetNextTabbableContentIn
       return contentToFocus;
     }
 
     // If not found in shadow DOM, search from the shadow host in light DOM
     if (!owner->IsInShadowTree()) {
       MOZ_ASSERT(owner->GetShadowRoot());
 
       *aStartContent = owner;
-      owner->IsFocusable(aCurrentTabIndex);
+      *aCurrentTabIndex = HostOrSlotTabIndexValue(owner);
       break;
     }
 
     startContent = owner;
   }
 
   return nullptr;
 }
@@ -3495,16 +3513,39 @@ nsFocusManager::GetNextTabbableContent(n
                                         aResultContent);
             if (NS_SUCCEEDED(rv) && *aResultContent) {
               return rv;
             }
           }
         }
       }
 
+      // As of now, 2018/04/12, sequential focus navigation is still
+      // in the obsolete Shadow DOM specification.
+      // http://w3c.github.io/webcomponents/spec/shadow/#sequential-focus-navigation
+      // "if ELEMENT is focusable, a shadow host, or a slot element,
+      //  append ELEMENT to NAVIGATION-ORDER."
+      // and later in "For each element ELEMENT in NAVIGATION-ORDER: "
+      // hosts and slots are handled before other elements.
+      if (currentContent && nsDocument::IsShadowDOMEnabled(currentContent) &&
+          IsHostOrSlot(currentContent)) {
+        int32_t tabIndex = HostOrSlotTabIndexValue(currentContent);
+        if (tabIndex >= 0 &&
+            (aIgnoreTabIndex || aCurrentTabIndex == tabIndex)) {
+          nsIContent* contentToFocus =
+            GetNextTabbableContentInScope(currentContent, currentContent, aForward,
+                                          aForward ? 1 : 0, aIgnoreTabIndex,
+                                          true /* aSkipOwner */);
+          if (contentToFocus) {
+            NS_ADDREF(*aResultContent = contentToFocus);
+            return NS_OK;
+          }
+        }
+      }
+
       // TabIndex not set defaults to 0 for form elements, anchors and other
       // elements that are normally focusable. Tabindex defaults to -1
       // for elements that are not normally focusable.
       // The returned computed tabindex from IsFocusable() is as follows:
       //          < 0 not tabbable at all
       //          == 0 in normal tab order (last after positive tabindexed items)
       //          > 0 can be tabbed to in the order specified by this value
       int32_t tabIndex;

--- a/dom/base/nsFocusManager.h
+++ b/dom/base/nsFocusManager.h
@@ -439,16 +439,23 @@ protected:
   nsIContent* FindOwner(nsIContent* aContent);
 
   /**
    * Returns true if aContent is a shadow host or slot
    */
   bool IsHostOrSlot(nsIContent* aContent);
 
   /**
+   * Host and Slot elements need to be handled as if they had tabindex 0 even
+   * when they don't have the attribute. This is a helper method to get the right
+   * value for focus navigation.
+   */
+  int32_t HostOrSlotTabIndexValue(nsIContent* aContent);
+
+  /**
    * Retrieve the next tabbable element in scope owned by aOwner, using
    * focusability and tabindex to determine the tab order.
    *
    * aOwner is the owner of scope to search in.
    *
    * aStartContent is the starting point for this call of this method.
    *
    * aForward should be true for forward navigation or false for backward

new file mode 100644
--- /dev/null
+++ b/dom/base/test/file_bug1453693.html
@@ -0,0 +1,137 @@
+<html>
+  <head>
+    <title>Test for Bug 1453693</title>
+    <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+    <script type="application/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
+    <script>
+
+      var lastFocusTarget;
+      function focusLogger(event) {
+        lastFocusTarget = event.target;
+        console.log(event.target + " under " + event.target.parentNode);
+      }
+
+      function testTabbingThroughShadowDOMWithTabIndexes() {
+        var anchor = document.createElement("a");
+        anchor.onfocus = focusLogger;
+        anchor.href = "#";
+        anchor.textContent = "in light DOM";
+        document.body.appendChild(anchor);
+
+        var host = document.createElement("div");
+        document.body.appendChild(host);
+
+        var sr = host.attachShadow({mode: "open"});
+        var shadowAnchor = anchor.cloneNode(false);
+        shadowAnchor.onfocus = focusLogger;
+        shadowAnchor.textContent = "in shadow DOM";
+        sr.appendChild(shadowAnchor);
+        var shadowInput = document.createElement("input");
+        shadowInput.onfocus = focusLogger;
+        shadowInput.tabIndex = 1;
+        sr.appendChild(shadowInput);
+
+        var input = document.createElement("input");
+        input.onfocus = focusLogger;
+        input.tabIndex = 1;
+        document.body.appendChild(input);
+
+        var input2 = document.createElement("input");
+        input2.onfocus = focusLogger;
+        document.body.appendChild(input2);
+
+        document.body.offsetLeft;
+
+        synthesizeKey("KEY_Tab");
+        opener.is(lastFocusTarget, input, "Should have focused input element. (3)");
+        synthesizeKey("KEY_Tab");
+        opener.is(lastFocusTarget, anchor, "Should have focused anchor element. (3)");
+        synthesizeKey("KEY_Tab");
+        opener.is(lastFocusTarget, shadowInput, "Should have focused input element in shadow DOM. (3)");
+        synthesizeKey("KEY_Tab");
+        opener.is(lastFocusTarget, shadowAnchor, "Should have focused anchor element in shadow DOM. (3)");
+        synthesizeKey("KEY_Tab");
+        opener.is(lastFocusTarget, input2, "Should have focused input[2] element. (3)");
+
+        // Backwards
+        synthesizeKey("KEY_Tab", {shiftKey: true});
+        opener.is(lastFocusTarget, shadowAnchor, "Should have focused anchor element in shadow DOM. (4)");
+        synthesizeKey("KEY_Tab", {shiftKey: true});
+        opener.is(lastFocusTarget, shadowInput, "Should have focused input element in shadow DOM. (4)");
+        synthesizeKey("KEY_Tab", {shiftKey: true});
+        opener.is(lastFocusTarget, anchor, "Should have focused anchor element. (4)");
+        synthesizeKey("KEY_Tab", {shiftKey: true});
+        opener.is(lastFocusTarget, input, "Should have focused input element. (4)");
+
+        document.body.innerHTML = null;
+      }
+
+      function testTabbingThroughSimpleShadowDOM() {
+        var anchor = document.createElement("a");
+        anchor.onfocus = focusLogger;
+        anchor.href = "#";
+        anchor.textContent = "in light DOM";
+        document.body.appendChild(anchor);
+        anchor.focus();
+
+        var host = document.createElement("div");
+        document.body.appendChild(host);
+
+        var sr = host.attachShadow({mode: "open"});
+        var shadowAnchor = anchor.cloneNode(false);
+        shadowAnchor.onfocus = focusLogger;
+        shadowAnchor.textContent = "in shadow DOM";
+        sr.appendChild(shadowAnchor);
+        var shadowInput = document.createElement("input");
+        shadowInput.onfocus = focusLogger;
+        sr.appendChild(shadowInput);
+
+        var input = document.createElement("input");
+        input.onfocus = focusLogger;
+        document.body.appendChild(input);
+
+        var input2 = document.createElement("input");
+        input2.onfocus = focusLogger;
+        document.body.appendChild(input2);
+
+        document.body.offsetLeft;
+
+        synthesizeKey("KEY_Tab");
+        opener.is(lastFocusTarget, shadowAnchor, "Should have focused anchor element in shadow DOM.");
+        synthesizeKey("KEY_Tab");
+        opener.is(lastFocusTarget, shadowInput, "Should have focused input element in shadow DOM.");
+        synthesizeKey("KEY_Tab");
+        opener.is(lastFocusTarget, input, "Should have focused input element.");
+        synthesizeKey("KEY_Tab");
+        opener.is(lastFocusTarget, input2, "Should have focused input[2] element.");
+
+        // Backwards
+        synthesizeKey("KEY_Tab", {shiftKey: true});
+        opener.is(lastFocusTarget, input, "Should have focused input element. (2)");
+        synthesizeKey("KEY_Tab", {shiftKey: true});
+        opener.is(lastFocusTarget, shadowInput, "Should have focused input element in shadow DOM. (2)");
+        synthesizeKey("KEY_Tab", {shiftKey: true});
+        opener.is(lastFocusTarget, shadowAnchor, "Should have focused anchor element in shadow DOM. (2)");
+        synthesizeKey("KEY_Tab", {shiftKey: true});
+        opener.is(lastFocusTarget, anchor, "Should have focused anchor element. (2)");
+      }
+
+      function runTest() {
+
+        testTabbingThroughShadowDOMWithTabIndexes();
+        testTabbingThroughSimpleShadowDOM();
+
+        opener.didRunTests();
+        window.close();
+      }
+
+      function init() {
+        SimpleTest.waitForFocus(runTest);
+      }
+    </script>
+    <style>
+    </style>
+  </head>
+  <body onload="init()">
+  </body>
+</html>

--- a/dom/base/test/mochitest.ini
+++ b/dom/base/test/mochitest.ini
@@ -121,16 +121,17 @@ support-files =
   file_bug769117.html
   file_bug782342.txt
   file_bug787778.sjs
   file_bug869432.eventsource
   file_bug869432.eventsource^headers^
   file_bug907892.html
   file_bug945152.jar
   file_bug1274806.html
+  file_bug1453693.html
   file_domwindowutils_animation.html
   file_general_document.html
   file_history_document_open.html
   file_htmlserializer_1.html
   file_htmlserializer_1_bodyonly.html
   file_htmlserializer_1_format.html
   file_htmlserializer_1_linebreak.html
   file_htmlserializer_1_links.html
@@ -607,16 +608,18 @@ skip-if = toolkit == 'android'
 [test_bug1318303.html]
 [test_bug1375050.html]
 [test_bug1381710.html]
 [test_bug1384661.html]
 [test_bug1399605.html]
 [test_bug1404385.html]
 [test_bug1406102.html]
 [test_bug1421568.html]
+[test_bug1453693.html]
+skip-if = os == "mac"
 [test_caretPositionFromPoint.html]
 [test_change_policy.html]
 [test_clearTimeoutIntervalNoArg.html]
 [test_constructor-assignment.html]
 [test_constructor.html]
 [test_copyimage.html]
 subsuite = clipboard
 skip-if = toolkit == 'android' #bug 904183

new file mode 100644
--- /dev/null
+++ b/dom/base/test/test_bug1453693.html
@@ -0,0 +1,40 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1453693
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1453693</title>
+  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+  <script type="application/javascript">
+
+  /** Test for Bug 1453693 **/
+
+  SimpleTest.waitForExplicitFinish();
+
+  function init() {
+    SpecialPowers.pushPrefEnv(
+      {
+        "set": [["dom.webcomponents.shadowdom.enabled", true]]
+      },
+      runTests);
+  }
+
+  function runTests() {
+    win = window.open("file_bug1453693.html", "", "width=300, height=300");
+  }
+
+  function didRunTests() {
+    setTimeout("SimpleTest.finish()");
+  }
+
+  SimpleTest.waitForFocus(init);
+
+  </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1453693">Mozilla Bug 1453693</a>
+</body>
+</html>

--- a/js/src/vm/UnboxedObject-inl.h
+++ b/js/src/vm/UnboxedObject-inl.h
@@ -10,113 +10,16 @@
 #include "vm/UnboxedObject.h"
 
 #include "gc/StoreBuffer-inl.h"
 #include "vm/ArrayObject-inl.h"
 #include "vm/NativeObject-inl.h"
 
 namespace js {
 
-static inline Value
-GetUnboxedValue(uint8_t* p, JSValueType type, bool maybeUninitialized)
-{
-    switch (type) {
-      case JSVAL_TYPE_BOOLEAN:
-        return BooleanValue(*p != 0);
-
-      case JSVAL_TYPE_INT32:
-        return Int32Value(*reinterpret_cast<int32_t*>(p));
-
-      case JSVAL_TYPE_DOUBLE: {
-        // During unboxed plain object creation, non-GC thing properties are
-        // left uninitialized. This is normally fine, since the properties will
-        // be filled in shortly, but if they are read before that happens we
-        // need to make sure that doubles are canonical.
-        double d = *reinterpret_cast<double*>(p);
-        if (maybeUninitialized)
-            return DoubleValue(JS::CanonicalizeNaN(d));
-        return DoubleValue(d);
-      }
-
-      case JSVAL_TYPE_STRING:
-        return StringValue(*reinterpret_cast<JSString**>(p));
-
-      case JSVAL_TYPE_OBJECT:
-        return ObjectOrNullValue(*reinterpret_cast<JSObject**>(p));
-
-      default:
-        MOZ_CRASH("Invalid type for unboxed value");
-    }
-}
-
-static inline bool
-SetUnboxedValue(JSContext* cx, JSObject* unboxedObject, jsid id,
-                uint8_t* p, JSValueType type, const Value& v, bool preBarrier)
-{
-    switch (type) {
-      case JSVAL_TYPE_BOOLEAN:
-        if (v.isBoolean()) {
-            *p = v.toBoolean();
-            return true;
-        }
-        return false;
-
-      case JSVAL_TYPE_INT32:
-        if (v.isInt32()) {
-            *reinterpret_cast<int32_t*>(p) = v.toInt32();
-            return true;
-        }
-        return false;
-
-      case JSVAL_TYPE_DOUBLE:
-        if (v.isNumber()) {
-            *reinterpret_cast<double*>(p) = v.toNumber();
-            return true;
-        }
-        return false;
-
-      case JSVAL_TYPE_STRING:
-        if (v.isString()) {
-            JSString** np = reinterpret_cast<JSString**>(p);
-            if (IsInsideNursery(v.toString()) && !IsInsideNursery(unboxedObject))
-                v.toString()->storeBuffer()->putWholeCell(unboxedObject);
-
-            if (preBarrier)
-                JSString::writeBarrierPre(*np);
-            *np = v.toString();
-            return true;
-        }
-        return false;
-
-      case JSVAL_TYPE_OBJECT:
-        if (v.isObjectOrNull()) {
-            JSObject** np = reinterpret_cast<JSObject**>(p);
-
-            // Update property types when writing object properties. Types for
-            // other properties were captured when the unboxed layout was
-            // created.
-            AddTypePropertyId(cx, unboxedObject, id, v);
-
-            // As above, trigger post barriers on the whole object.
-            JSObject* obj = v.toObjectOrNull();
-            if (IsInsideNursery(obj) && !IsInsideNursery(unboxedObject))
-                obj->storeBuffer()->putWholeCell(unboxedObject);
-
-            if (preBarrier)
-                JSObject::writeBarrierPre(*np);
-            *np = obj;
-            return true;
-        }
-        return false;
-
-      default:
-        MOZ_CRASH("Invalid type for unboxed value");
-    }
-}
-
 /////////////////////////////////////////////////////////////////////
 // UnboxedPlainObject
 /////////////////////////////////////////////////////////////////////
 
 inline const UnboxedLayout&
 UnboxedPlainObject::layout() const
 {
     return group()->unboxedLayout();

--- a/js/src/vm/UnboxedObject.cpp
+++ b/js/src/vm/UnboxedObject.cpp
@@ -1,16 +1,18 @@
 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
  * vim: set ts=8 sts=4 et sw=4 tw=99:
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "vm/UnboxedObject-inl.h"
 
+#include "mozilla/MemoryChecking.h"
+
 #include "jit/BaselineIC.h"
 #include "jit/ExecutableAllocator.h"
 #include "jit/JitCommon.h"
 #include "jit/Linker.h"
 
 #include "gc/Nursery-inl.h"
 #include "jit/MacroAssembler-inl.h"
 #include "vm/JSObject-inl.h"
@@ -301,16 +303,121 @@ UnboxedLayout::makeConstructorCode(JSCon
 
 void
 UnboxedLayout::detachFromCompartment()
 {
     if (isInList())
         remove();
 }
 
+static Value
+GetUnboxedValue(uint8_t* p, JSValueType type, bool maybeUninitialized)
+{
+    switch (type) {
+      case JSVAL_TYPE_BOOLEAN:
+        if (maybeUninitialized) {
+            // Squelch Valgrind/MSan errors.
+            MOZ_MAKE_MEM_DEFINED(p, 1);
+        }
+        return BooleanValue(*p != 0);
+
+      case JSVAL_TYPE_INT32:
+        if (maybeUninitialized)
+            MOZ_MAKE_MEM_DEFINED(p, sizeof(int32_t));
+        return Int32Value(*reinterpret_cast<int32_t*>(p));
+
+      case JSVAL_TYPE_DOUBLE: {
+        // During unboxed plain object creation, non-GC thing properties are
+        // left uninitialized. This is normally fine, since the properties will
+        // be filled in shortly, but if they are read before that happens we
+        // need to make sure that doubles are canonical.
+        if (maybeUninitialized)
+            MOZ_MAKE_MEM_DEFINED(p, sizeof(double));
+        double d = *reinterpret_cast<double*>(p);
+        if (maybeUninitialized)
+            return DoubleValue(JS::CanonicalizeNaN(d));
+        return DoubleValue(d);
+      }
+
+      case JSVAL_TYPE_STRING:
+        return StringValue(*reinterpret_cast<JSString**>(p));
+
+      case JSVAL_TYPE_OBJECT:
+        return ObjectOrNullValue(*reinterpret_cast<JSObject**>(p));
+
+      default:
+        MOZ_CRASH("Invalid type for unboxed value");
+    }
+}
+
+static bool
+SetUnboxedValue(JSContext* cx, JSObject* unboxedObject, jsid id,
+                uint8_t* p, JSValueType type, const Value& v, bool preBarrier)
+{
+    switch (type) {
+      case JSVAL_TYPE_BOOLEAN:
+        if (v.isBoolean()) {
+            *p = v.toBoolean();
+            return true;
+        }
+        return false;
+
+      case JSVAL_TYPE_INT32:
+        if (v.isInt32()) {
+            *reinterpret_cast<int32_t*>(p) = v.toInt32();
+            return true;
+        }
+        return false;
+
+      case JSVAL_TYPE_DOUBLE:
+        if (v.isNumber()) {
+            *reinterpret_cast<double*>(p) = v.toNumber();
+            return true;
+        }
+        return false;
+
+      case JSVAL_TYPE_STRING:
+        if (v.isString()) {
+            JSString** np = reinterpret_cast<JSString**>(p);
+            if (IsInsideNursery(v.toString()) && !IsInsideNursery(unboxedObject))
+                v.toString()->storeBuffer()->putWholeCell(unboxedObject);
+
+            if (preBarrier)
+                JSString::writeBarrierPre(*np);
+            *np = v.toString();
+            return true;
+        }
+        return false;
+
+      case JSVAL_TYPE_OBJECT:
+        if (v.isObjectOrNull()) {
+            JSObject** np = reinterpret_cast<JSObject**>(p);
+
+            // Update property types when writing object properties. Types for
+            // other properties were captured when the unboxed layout was
+            // created.
+            AddTypePropertyId(cx, unboxedObject, id, v);
+
+            // As above, trigger post barriers on the whole object.
+            JSObject* obj = v.toObjectOrNull();
+            if (IsInsideNursery(obj) && !IsInsideNursery(unboxedObject))
+                obj->storeBuffer()->putWholeCell(unboxedObject);
+
+            if (preBarrier)
+                JSObject::writeBarrierPre(*np);
+            *np = obj;
+            return true;
+        }
+        return false;
+
+      default:
+        MOZ_CRASH("Invalid type for unboxed value");
+    }
+}
+
 /////////////////////////////////////////////////////////////////////
 // UnboxedPlainObject
 /////////////////////////////////////////////////////////////////////
 
 bool
 UnboxedPlainObject::setValue(JSContext* cx, const UnboxedLayout::Property& property,
                              const Value& v)
 {

--- a/netwerk/base/nsStandardURL.cpp
+++ b/netwerk/base/nsStandardURL.cpp
@@ -1800,16 +1800,17 @@ nsStandardURL::SetPassword(const nsACStr
     const nsPromiseFlatCString &password = PromiseFlatCString(input);
 
     auto clearedPassword = MakeScopeExit([&password, this]() {
         // Check that if this method is called with the empty string then the
         // password is definitely cleared when exiting this method.
         if (password.IsEmpty()) {
             MOZ_DIAGNOSTIC_ASSERT(this->Password().IsEmpty());
         }
+        Unused << this; // silence compiler -Wunused-lambda-capture
     });
 
     LOG(("nsStandardURL::SetPassword [password=%s]\n", password.get()));
 
     if (mURLType == URLTYPE_NO_AUTHORITY) {
         if (password.IsEmpty())
             return NS_OK;
         NS_WARNING("cannot set password on no-auth url");

--- a/toolkit/components/downloads/DownloadHistory.jsm
+++ b/toolkit/components/downloads/DownloadHistory.jsm
@@ -416,18 +416,26 @@ var DownloadHistoryList = function(publi
   this._slots = [];
   this._slotsForUrl = new Map();
   this._slotForDownload = new WeakMap();
 
   // Start the asynchronous queries to retrieve history and session downloads.
   publicList.addView(this).catch(Cu.reportError);
   let query = {}, options = {};
   PlacesUtils.history.queryStringToQuery(place, query, options);
+
+  // NB: The addObserver call sets our nsINavHistoryResultObserver.result.
   let result = PlacesUtils.history.executeQuery(query.value, options.value);
   result.addObserver(this);
+
+  // Our history result observer is long lived for fast shared views, so free
+  // the reference on shutdown to prevent leaks.
+  Services.obs.addObserver(() => {
+    this.result = null;
+  }, "quit-application-granted");
 };
 
 this.DownloadHistoryList.prototype = {
   __proto__: DownloadList.prototype,
 
   /**
    * This is set when executing the Places query.
    */
@@ -450,27 +458,16 @@ this.DownloadHistoryList.prototype = {
     if (this._result) {
       this._result.root.containerOpen = true;
       PlacesUtils.annotations.addObserver(this);
     }
   },
   _result: null,
 
   /**
-   * Remove the view that belongs to this list via DownloadList's removeView. In
-   * addition, delete the result object to ensure there are no memory leaks.
-   */
-  removeView(aView) {
-    DownloadList.prototype.removeView.call(this, aView);
-
-    // Clean up any active results that might still be observing. See bug 1455737
-    this.result = null;
-  },
-
-  /**
    * Index of the first slot that contains a session download. This is equal to
    * the length of the list when there are no session downloads.
    */
   _firstSessionSlotIndex: 0,
 
   _insertSlot({ slot, index, slotsForUrl }) {
     // Add the slot to the ordered array.
     this._slots.splice(index, 0, slot);

--- a/toolkit/components/downloads/test/unit/test_DownloadHistory.js
+++ b/toolkit/components/downloads/test/unit/test_DownloadHistory.js
@@ -253,17 +253,29 @@ add_task(async function test_DownloadHis
   let allHistoryList2 = await DownloadHistory.getList({ type: Downloads.ALL,
     maxHistoryResults: 3 });
   // Prepare the set of downloads to contain fewer history downloads by removing
   // the oldest ones.
   let allView2 = new TestView(allView.expected.slice(3));
   await allHistoryList2.addView(allView2);
   await allView2.waitForExpected();
 
+  // Create a dummy list and view like the previous limited one to just add and
+  // remove its view to make sure it doesn't break other lists' updates.
+  let dummyList = await DownloadHistory.getList({ type: Downloads.ALL,
+    maxHistoryResults: 3 });
+  let dummyView = new TestView([]);
+  await dummyList.addView(dummyView);
+  await dummyList.removeView(dummyView);
+
   // Clear history and check that session downloads with partial data remain.
   // Private downloads are also not cleared when clearing history.
   view.expected = view.expected.filter(d => d.hasPartialData);
   allView.expected = allView.expected.filter(d => d.hasPartialData ||
                                                   d.isPrivate);
   await PlacesUtils.history.clear();
   await view.waitForExpected();
   await allView.waitForExpected();
+
+  // Check that the dummy view above did not prevent the limited from updating.
+  allView2.expected = allView.expected;
+  await allView2.waitForExpected();
 });

--- a/toolkit/components/places/tests/unit/test_454977.js
+++ b/toolkit/components/places/tests/unit/test_454977.js
@@ -4,35 +4,33 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 // Cache actual visit_count value, filled by add_visit, used by check_results
 var visit_count = 0;
 
 // Returns the Place ID corresponding to an added visit.
 async function task_add_visit(aURI, aVisitType) {
-  // Add the visit asynchronously, and save its visit ID.
-  let deferUpdatePlaces = new Promise((resolve, reject) => {
-    PlacesUtils.asyncHistory.updatePlaces({
-      uri: aURI,
-      visits: [{ transitionType: aVisitType, visitDate: Date.now() * 1000 }]
-    }, {
-      handleError: function TAV_handleError() {
-        reject(new Error("Unexpected error in adding visit."));
-      },
-      handleResult(aPlaceInfo) {
-        this.visitId = aPlaceInfo.visits[0].visitId;
-      },
-      handleCompletion: function TAV_handleCompletion() {
-        resolve(this.visitId);
-      }
-    });
-  });
+  // Wait for a visits notification and get the visitId.
+  let visitId;
+  let visitsPromise = PlacesTestUtils.waitForNotification("onVisits", visits => {
+    visitId = visits[0].visitId;
+    let {uri} = visits[0];
+    return uri.equals(aURI);
+  }, "history");
 
-  let visitId = await deferUpdatePlaces;
+  // Add visits.
+  await PlacesTestUtils.addVisits([{
+    uri: aURI,
+    transition: aVisitType
+  }]);
+
+  if (aVisitType != TRANSITION_EMBED) {
+    await visitsPromise;
+  }
 
   // Increase visit_count if applicable
   if (aVisitType != 0 &&
       aVisitType != TRANSITION_EMBED &&
       aVisitType != TRANSITION_FRAMED_LINK &&
       aVisitType != TRANSITION_DOWNLOAD &&
       aVisitType != TRANSITION_RELOAD) {
     visit_count++;

--- a/toolkit/components/places/tests/unit/test_download_history.js
+++ b/toolkit/components/places/tests/unit/test_download_history.js
@@ -149,44 +149,51 @@ add_task(async function test_dh_addBookm
       });
       gDownloadHistory.removeAllDownloads();
     });
 
     gDownloadHistory.addDownload(DOWNLOAD_URI, null, Date.now() * 1000);
   });
 });
 
-add_test(function test_dh_addDownload_referrer() {
-  waitForOnVisit(function DHAD_prepareReferrer(aURI, aVisitID) {
-    Assert.ok(aURI.equals(REFERRER_URI));
-    let referrerVisitId = aVisitID;
+add_task(async function test_dh_addDownload_referrer() {
+  // Wait for visits notification and get the visit id.
+  let visitId;
+  let referrerPromise = PlacesTestUtils.waitForNotification("onVisits", visits => {
+    visitId = visits[0].visitId;
+    let {uri} = visits[0];
+    return uri.equals(REFERRER_URI);
+  }, "history");
 
-    waitForOnVisit(function DHAD_onVisit(aVisitedURI, unused, unused2, unused3,
-                                         aReferringID) {
-      Assert.ok(aVisitedURI.equals(DOWNLOAD_URI));
-      Assert.equal(aReferringID, referrerVisitId);
-
-      // Verify that the URI is already available in results at this time.
-      Assert.ok(!!page_in_database(DOWNLOAD_URI));
+  await PlacesTestUtils.addVisits([{
+    uri: REFERRER_URI,
+    transition: Ci.nsINavHistoryService.TRANSITION_TYPED
+  }]);
+  await referrerPromise;
 
-      PlacesUtils.history.clear().then(run_next_test);
-    });
-
-    gDownloadHistory.addDownload(DOWNLOAD_URI, REFERRER_URI, Date.now() * 1000);
-  });
+  // Verify results for referrer uri.
+  Assert.ok(!!PlacesTestUtils.isPageInDB(REFERRER_URI));
+  Assert.equal(visitId, 1);
 
-  // Note that we don't pass the optional callback argument here because we must
-  // ensure that we receive the onVisits notification before we call addDownload.
-  PlacesUtils.asyncHistory.updatePlaces({
-    uri: REFERRER_URI,
-    visits: [{
-      transitionType: Ci.nsINavHistoryService.TRANSITION_TYPED,
-      visitDate: Date.now() * 1000
-    }]
-  });
+  // Wait for visits notification and get the referrer Id.
+  let referrerId;
+  let downloadPromise = PlacesTestUtils.waitForNotification("onVisits", visits => {
+    referrerId = visits[0].referrerId;
+    let {uri} = visits[0];
+    return uri.equals(DOWNLOAD_URI);
+  }, "history");
+
+  gDownloadHistory.addDownload(DOWNLOAD_URI, REFERRER_URI, Date.now() * 1000);
+  await downloadPromise;
+
+  // Verify results for download uri.
+  Assert.ok(!!PlacesTestUtils.isPageInDB(DOWNLOAD_URI));
+  Assert.equal(visitId, referrerId);
+
+  await PlacesUtils.history.clear();
 });
 
 add_test(function test_dh_addDownload_disabledHistory() {
   waitForOnVisit(function DHAD_onVisit(aURI) {
     // We should only receive the notification for the non-private URI.  This
     // test is based on the assumption that visit notifications are received in
     // the same order of the addDownload calls, which is currently true because
     // database access is serialized on the same worker thread.

--- a/toolkit/components/places/tests/unit/test_isURIVisited.js
+++ b/toolkit/components/places/tests/unit/test_isURIVisited.js
@@ -18,64 +18,51 @@ const SCHEMES = {
   "view-source:http://": false,
   "chrome://browser/content/browser.xul?": false,
   "resource://": false,
   "data:,": false,
   "wyciwyg:/0/http://": false,
   "javascript:": false,
 };
 
-var gRunner;
-function run_test() {
-  do_test_pending();
-  gRunner = step();
-  gRunner.next();
-}
-
-function* step() {
+add_task(async function test_isURIVisited() {
   let history = Cc["@mozilla.org/browser/history;1"]
                   .getService(Ci.mozIAsyncHistory);
 
+  function visitsPromise(uri) {
+    return new Promise(resolve => {
+      history.isURIVisited(uri, (receivedURI, visited) => {
+        resolve([receivedURI, visited]);
+      });
+    });
+  }
+
   for (let scheme in SCHEMES) {
     info("Testing scheme " + scheme);
     for (let t in PlacesUtils.history.TRANSITIONS) {
       info("With transition " + t);
-      let transition = PlacesUtils.history.TRANSITIONS[t];
-
-      let uri = NetUtil.newURI(scheme + "mozilla.org/");
+      let aTransition = PlacesUtils.history.TRANSITIONS[t];
 
-      history.isURIVisited(uri, function(aURI, aIsVisited) {
-        Assert.ok(uri.equals(aURI));
-        Assert.ok(!aIsVisited);
+      let aURI = Services.io.newURI(scheme + "mozilla.org/");
 
-        let callback = {
-          handleError() {},
-          handleResult() {},
-          handleCompletion() {
-            info("Added visit to " + uri.spec);
-
-            history.isURIVisited(uri, function(aURI2, aIsVisited2) {
-              Assert.ok(uri.equals(aURI2));
-              Assert.ok(SCHEMES[scheme] ? aIsVisited2 : !aIsVisited2);
+      let [receivedURI1, visited1] = await visitsPromise(aURI);
+      Assert.ok(aURI.equals(receivedURI1));
+      Assert.ok(!visited1);
 
-              PlacesUtils.history.clear().then(function() {
-                history.isURIVisited(uri, function(aURI3, aIsVisited3) {
-                  Assert.ok(uri.equals(aURI3));
-                  Assert.ok(!aIsVisited3);
-                  gRunner.next();
-                });
-              });
-            });
-          },
-        };
+      if (PlacesUtils.history.canAddURI(aURI)) {
+        await PlacesTestUtils.addVisits([{
+          uri: aURI,
+          transition: aTransition
+        }]);
+        info("Added visit for " + aURI.spec);
+      }
 
-        history.updatePlaces({ uri,
-                               visits: [ { transitionType: transition,
-                                           visitDate:      Date.now() * 1000
-                                         } ]
-                             }, callback);
-      });
-      yield undefined;
+      let [receivedURI2, visited2] = await visitsPromise(aURI);
+      Assert.ok(aURI.equals(receivedURI2));
+      Assert.equal(SCHEMES[scheme], visited2);
+
+      await PlacesUtils.history.clear();
+      let [receivedURI3, visited3] = await visitsPromise(aURI);
+      Assert.ok(aURI.equals(receivedURI3));
+      Assert.ok(!visited3);
     }
   }
-
-  do_test_finished();
-}
+});

--- a/toolkit/content/jar.mn
+++ b/toolkit/content/jar.mn
@@ -69,17 +69,16 @@ toolkit.jar:
    content/global/bindings/colorpicker.xml     (widgets/colorpicker.xml)
    content/global/bindings/datekeeper.js       (widgets/datekeeper.js)
    content/global/bindings/datepicker.js       (widgets/datepicker.js)
    content/global/bindings/datetimepopup.xml   (widgets/datetimepopup.xml)
    content/global/bindings/datetimebox.xml     (widgets/datetimebox.xml)
    content/global/bindings/datetimebox.css     (widgets/datetimebox.css)
 *  content/global/bindings/dialog.xml          (widgets/dialog.xml)
    content/global/bindings/editor.xml          (widgets/editor.xml)
-   content/global/bindings/filefield.xml       (widgets/filefield.xml)
 *  content/global/bindings/findbar.xml         (widgets/findbar.xml)
    content/global/bindings/general.xml         (widgets/general.xml)
    content/global/bindings/groupbox.xml        (widgets/groupbox.xml)
    content/global/bindings/listbox.xml         (widgets/listbox.xml)
    content/global/bindings/menu.xml            (widgets/menu.xml)
    content/global/bindings/menulist.xml        (widgets/menulist.xml)
    content/global/bindings/notification.xml    (widgets/notification.xml)
    content/global/bindings/numberbox.xml       (widgets/numberbox.xml)

--- a/toolkit/content/preferencesBindings.js
+++ b/toolkit/content/preferencesBindings.js
@@ -441,17 +441,17 @@ const Preferences = window.Preferences =
       case "colorpicker":
       case "radiogroup":
       case "textbox":
       case "listitem":
       case "listbox":
       case "menulist":
         return true;
       }
-      return aElement.getAttribute("preference-editable") == "true";
+      return false;
     }
 
     updateElements() {
       if (!this.id)
         return;
 
       // This "change" event handler tracks changes made to preferences by
       // sources other than the user in this window.

deleted file mode 100644
--- a/toolkit/content/widgets/filefield.xml
+++ /dev/null
@@ -1,93 +0,0 @@
-<?xml version="1.0"?>
-<!-- This Source Code Form is subject to the terms of the Mozilla Public
-   - License, v. 2.0. If a copy of the MPL was not distributed with this
-   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
-
-
-<bindings id="filefieldBindings"
-          xmlns="http://www.mozilla.org/xbl"
-          xmlns:xbl="http://www.mozilla.org/xbl"
-          xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
-
-  <binding id="filefield" extends="chrome://global/content/bindings/general.xml#basetext">
-    <resources>
-      <stylesheet src="chrome://global/skin/filefield.css"/>
-    </resources>
-    <content>
-      <xul:stringbundle anonid="bundle" src="chrome://global/locale/filefield.properties"/>
-      <xul:hbox class="fileFieldContentBox" align="center" flex="1" xbl:inherits="disabled">
-        <xul:image class="fileFieldIcon" xbl:inherits="src=image,disabled"/>
-        <xul:textbox class="fileFieldLabel" xbl:inherits="value=label,disabled,accesskey,tabindex,aria-labelledby" flex="1" readonly="true"/>
-      </xul:hbox>
-    </content>
-    <implementation implements="nsIDOMXULLabeledControlElement">
-      <property name="label" onget="return this.getAttribute('label');">
-        <setter>
-          this.setAttribute("label", val);
-          var elt = document.getAnonymousElementByAttribute(this, "class", "fileFieldLabel");
-          return (elt.value = val);
-        </setter>
-      </property>
-
-      <field name="_file">null</field>
-      <property name="file"  onget="return this._file">
-        <setter>
-        <![CDATA[
-          this._file = val;
-          if (val) {
-            this.image = this._getIconURLForFile(val);
-            this.label = this._getDisplayNameForFile(val);
-          } else {
-            this.removeAttribute("image");
-            var bundle = document.getAnonymousElementByAttribute(this, "anonid", "bundle");
-            this.label = bundle.getString("downloadHelperNoneSelected");
-          }
-          return val;
-        ]]>
-        </setter>
-      </property>
-      <method name="_getDisplayNameForFile">
-        <parameter name="aFile"/>
-        <body>
-        <![CDATA[
-          if (/Win/.test(navigator.platform)) {
-            var lfw = aFile.QueryInterface(Ci.nsILocalFileWin);
-            try {
-              return lfw.getVersionInfoField("FileDescription");
-            } catch (e) {
-              // fall through to the filename
-            }
-          } else if (/Mac/.test(navigator.platform)) {
-            var lfm = aFile.QueryInterface(Ci.nsILocalFileMac);
-            try {
-              return lfm.bundleDisplayName;
-            } catch (e) {
-              // fall through to the file name
-            }
-          }
-          var ios = Cc["@mozilla.org/network/io-service;1"]
-                      .getService(Ci.nsIIOService);
-          var url = ios.newFileURI(aFile).QueryInterface(Ci.nsIURL);
-          return url.fileName;
-        ]]>
-        </body>
-      </method>
-
-      <method name="_getIconURLForFile">
-        <parameter name="aFile"/>
-        <body>
-        <![CDATA[
-          if (!aFile)
-            return "";
-          var ios = Cc["@mozilla.org/network/io-service;1"]
-                      .getService(Ci.nsIIOService);
-          var fph = ios.getProtocolHandler("file")
-                       .QueryInterface(Ci.nsIFileProtocolHandler);
-          var urlspec = fph.getURLSpecFromFile(aFile);
-          return "moz-icon://" + urlspec + "?size=16";
-        ]]>
-        </body>
-      </method>
-    </implementation>
-  </binding>
-</bindings>