--- a/browser/base/content/browser-pageActions.js
+++ b/browser/base/content/browser-pageActions.js
@@ -1253,8 +1253,65 @@ BrowserPageActions.addSearchEngine = {
         let prompt = Services.prompt.getPrompt(gBrowser.contentWindow, Ci.nsIPrompt);
         prompt.QueryInterface(Ci.nsIWritablePropertyBag2);
         prompt.setPropertyAsBool("allowTabModal", true);
         prompt.alert(title, text);
       },
     });
   },
 };
+
+// share URL
+BrowserPageActions.shareURL = {
+  onShowingInPanel(buttonNode) {
+    this._cached = false;
+  },
+
+  onPlacedInPanel(buttonNode) {
+    let action = PageActions.actionForID("shareURL");
+    BrowserPageActions.takeActionTitleFromPanel(action);
+  },
+
+  onShowingSubview(panelViewNode) {
+    // We cache the providers + the UI if the user selects the share
+    // panel multiple times while the panel is open.
+    if (this._cached) {
+      return;
+    }
+
+    let sharingService = this._sharingService;
+    let url = gBrowser.selectedBrowser.currentURI;
+    let currentURI = gURLBar.makeURIReadable(url).displaySpec;
+    let shareProviders = sharingService.getSharingProviders(currentURI);
+    let fragment = document.createDocumentFragment();
+
+    shareProviders.forEach(function(share) {
+      let item = document.createElement("toolbarbutton");
+      item.setAttribute("label", share.menuItemTitle);
+      item.setAttribute("share-title", share.title);
+      item.setAttribute("image", share.image);
+      item.classList.add("subviewbutton", "subviewbutton-iconic");
+
+      item.addEventListener("command", event => {
+        let shareTitle = event.target.getAttribute("share-title");
+        if (shareTitle) {
+          sharingService.shareUrl(shareTitle, currentURI);
+        }
+        PanelMultiView.hidePopup(BrowserPageActions.panelNode);
+      });
+
+      fragment.appendChild(item);
+    });
+
+    let bodyNode = panelViewNode.querySelector(".panel-subview-body");
+    while (bodyNode.firstChild) {
+      bodyNode.firstChild.remove();
+    }
+    bodyNode.appendChild(fragment);
+    this._cached = true;
+  }
+};
+
+// Attach sharingService here so tests can override the implementation
+XPCOMUtils.defineLazyServiceGetter(BrowserPageActions.shareURL,
+                                   "_sharingService",
+                                   "@mozilla.org/widget/macsharingservice;1",
+                                   "nsIMacSharingService");

--- a/browser/base/content/browser.xul
+++ b/browser/base/content/browser.xul
@@ -435,17 +435,18 @@
            flip="slide"
            photon="true"
            position="bottomcenter topright"
            tabspecific="true"
            noautofocus="true"
            copyURL-title="&pageAction.copyLink.label;"
            emailLink-title="&emailPageCmd.label;"
            sendToDevice-title="&pageAction.sendTabToDevice.label;"
-           sendToDevice-notReadyTitle="&sendToDevice.syncNotReady.label;">
+           sendToDevice-notReadyTitle="&sendToDevice.syncNotReady.label;"
+           shareURL-title="&pageAction.shareUrl.label;">
       <panelmultiview id="pageActionPanelMultiView"
                       mainViewId="pageActionPanelMainView"
                       viewCacheId="appMenu-viewCache">
         <panelview id="pageActionPanelMainView"
                    context="pageActionContextMenu"
                    class="PanelUI-subView">
           <vbox class="panel-subview-body"/>
         </panelview>

--- a/browser/base/content/test/urlbar/browser.ini
+++ b/browser/base/content/test/urlbar/browser.ini
@@ -47,16 +47,18 @@ support-files =
   page_action_menu_add_search_engine_one.html
   page_action_menu_add_search_engine_many.html
   page_action_menu_add_search_engine_same_names.html
   page_action_menu_add_search_engine_0.xml
   page_action_menu_add_search_engine_1.xml
   page_action_menu_add_search_engine_2.xml
 [browser_page_action_menu_clipboard.js]
 subsuite = clipboard
+[browser_page_action_menu_share_mac.js]
+skip-if = os != "mac" # Mac only feature
 [browser_pasteAndGo.js]
 subsuite = clipboard
 [browser_removeUnsafeProtocolsFromURLBarPaste.js]
 subsuite = clipboard
 [browser_search_favicon.js]
 [browser_tabMatchesInAwesomebar.js]
 support-files =
   moz.png

new file mode 100644
--- /dev/null
+++ b/browser/base/content/test/urlbar/browser_page_action_menu_share_mac.js
@@ -0,0 +1,72 @@
+/* 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/. */
+
+"use strict";
+
+/* global sinon */
+Services.scriptloader.loadSubScript("resource://testing-common/sinon-2.3.2.js");
+
+// Keep track of title of service we chose to share with
+let sharedTitle;
+let sharedUrl;
+
+let mockShareData = [{
+  title: "NSA",
+  menuItemTitle: "National Security Agency",
+  image: "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEA" +
+    "LAAAAAABAAEAAAICTAEAOw=="
+}];
+
+let stub = sinon.stub(BrowserPageActions.shareURL, "_sharingService").get(() => {
+  return {
+    getSharingProviders(url) {
+      return mockShareData;
+    },
+    shareUrl(title, url) {
+      sharedUrl = url;
+      sharedTitle = title;
+    }
+  };
+});
+
+registerCleanupFunction(async function() {
+  stub.restore();
+  delete window.sinon;
+  await EventUtils.synthesizeNativeMouseMove(document.documentElement, 0, 0);
+  await PlacesUtils.history.clear();
+});
+
+add_task(async function shareURL() {
+  // Open an actionable page so that the main page action button appears.  (It
+  // does not appear on about:blank for example.)
+  let url = "http://example.org/";
+
+  await BrowserTestUtils.withNewTab(url, async () => {
+    // Open the panel.
+    await promisePageActionPanelOpen();
+
+    // Click Share URL.
+    let shareURLButton = document.getElementById("pageAction-panel-shareURL");
+    let viewPromise = promisePageActionViewShown();
+    EventUtils.synthesizeMouseAtCenter(shareURLButton, {});
+
+    let view = await viewPromise;
+    let body = document.getElementById(view.id + "-body");
+
+    Assert.equal(body.childNodes.length, 1, "Has correct share receivers");
+    let shareButton = body.childNodes[0];
+    Assert.equal(shareButton.label, mockShareData[0].menuItemTitle);
+    let hiddenPromise = promisePageActionPanelHidden();
+    // Click on share, panel should hide and sharingService should be
+    // given the title of service to share with
+    EventUtils.synthesizeMouseAtCenter(shareButton, {});
+    await hiddenPromise;
+
+    Assert.equal(sharedTitle, mockShareData[0].title,
+                 "Shared with the correct title");
+    Assert.equal(sharedUrl, "http://example.org/",
+                 "Shared correct URL");
+
+  });
+});

--- a/browser/base/content/test/urlbar/browser_search_favicon.js
+++ b/browser/base/content/test/urlbar/browser_search_favicon.js
@@ -6,16 +6,20 @@ registerCleanupFunction(() => {
   Services.prefs.clearUserPref(gRestyleSearchesPref);
   Services.search.currentEngine = gOriginalEngine;
   Services.search.removeEngine(gEngine);
   return PlacesUtils.history.clear();
 });
 
 add_task(async function() {
   Services.prefs.setBoolPref(gRestyleSearchesPref, true);
+
+  // This test is sensitive to the mouse position hovering awesome
+  // bar elements, so make sure it doesnt
+  await EventUtils.synthesizeNativeMouseMove(document.documentElement, 0, 0);
 });
 
 add_task(async function() {
 
   Services.search.addEngineWithDetails("SearchEngine", "", "", "",
                                        "GET", "http://s.example.com/search");
   gEngine = Services.search.getEngineByName("SearchEngine");
   gEngine.addParam("q", "{searchTerms}", null);

--- a/browser/locales/en-US/chrome/browser/browser.dtd
+++ b/browser/locales/en-US/chrome/browser/browser.dtd
@@ -989,16 +989,18 @@ you can use these alternative items. Oth
 <!ENTITY pageAction.removeFromUrlbar.label "Remove from Address Bar">
 <!ENTITY pageAction.allowInUrlbar.label "Show in Address Bar">
 <!ENTITY pageAction.disallowInUrlbar.label "Don’t Show in Address Bar">
 <!ENTITY pageAction.manageExtension.label "Manage Extension…">
 
 <!ENTITY pageAction.sendTabToDevice.label "Send Tab to Device">
 <!ENTITY sendToDevice.syncNotReady.label "Syncing Devices…">
 
+<!ENTITY pageAction.shareUrl.label "Share">
+
 <!ENTITY libraryButton.tooltip "View history, saved bookmarks, and more">
 
 <!-- LOCALIZATION NOTE: (accessibilityIndicator.tooltip): This is used to
      display a tooltip for accessibility indicator in toolbar/tabbar. It is also
      used as a textual label for the indicator used by assistive technology
      users. -->
 <!ENTITY accessibilityIndicator.tooltip "Accessibility Features Enabled">
 

--- a/browser/modules/PageActions.jsm
+++ b/browser/modules/PageActions.jsm
@@ -1162,16 +1162,35 @@ if (Services.prefs.getBoolPref("identity
     },
     onSubviewShowing(panelViewNode) {
       browserPageActions(panelViewNode).sendToDevice
         .onShowingSubview(panelViewNode);
     },
   });
 }
 
+if (AppConstants.platform == "macosx") {
+  gBuiltInActions.push(
+  // Share URL
+  {
+    id: "shareURL",
+    title: "shareURL-title",
+    onShowingInPanel(buttonNode) {
+      browserPageActions(buttonNode).shareURL.onShowingInPanel(buttonNode);
+    },
+    onPlacedInPanel(buttonNode) {
+      browserPageActions(buttonNode).shareURL.onPlacedInPanel(buttonNode);
+    },
+    wantsSubview: true,
+    onSubviewShowing(panelViewNode) {
+        browserPageActions(panelViewNode).shareURL
+          .onShowingSubview(panelViewNode);
+    },
+  });
+}
 
 /**
  * Gets a BrowserPageActions object in a browser window.
  *
  * @param  obj
  *         Either a DOM node or a browser window.
  * @return The BrowserPageActions object in the browser window related to the
  *         given object.

--- a/browser/themes/osx/browser.css
+++ b/browser/themes/osx/browser.css
@@ -330,16 +330,20 @@ html|input.urlbar-input {
 }
 
 .urlbar-display {
   margin-top: 0;
   margin-bottom: 0;
   color: GrayText;
 }
 
+#pageAction-panel-shareURL {
+  list-style-image: url("chrome://browser/skin/share.svg");
+}
+
 %include ../shared/urlbarSearchSuggestionsNotification.inc.css
 
 /* ----- AUTOCOMPLETE ----- */
 
 %include ../shared/autocomplete.inc.css
 %include ../shared/urlbar-autocomplete.inc.css
 
 :root {

--- a/browser/themes/osx/jar.mn
+++ b/browser/themes/osx/jar.mn
@@ -51,16 +51,17 @@ browser.jar:
   skin/classic/browser/places/livemark-item.png             (places/livemark-item.png)
   skin/classic/browser/preferences/alwaysAsk.png            (preferences/alwaysAsk.png)
   skin/classic/browser/preferences/application.png          (preferences/application.png)
   skin/classic/browser/preferences/saveFile.png             (preferences/saveFile.png)
 * skin/classic/browser/preferences/preferences.css          (preferences/preferences.css)
 * skin/classic/browser/preferences/in-content/preferences.css (preferences/in-content/preferences.css)
 * skin/classic/browser/preferences/in-content/dialog.css      (preferences/in-content/dialog.css)
   skin/classic/browser/preferences/applications.css         (preferences/applications.css)
+  skin/classic/browser/share.svg                            (share.svg)
   skin/classic/browser/tabbrowser/tabDragIndicator.png                   (tabbrowser/tabDragIndicator.png)
   skin/classic/browser/tabbrowser/tabDragIndicator@2x.png                (tabbrowser/tabDragIndicator@2x.png)
   skin/classic/browser/e10s-64@2x.png                                  (../shared/e10s-64@2x.png)
 
 [extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}] chrome.jar:
 % override chrome://browser/skin/feeds/audioFeedIcon.png                   chrome://browser/skin/feeds/feedIcon.png
 % override chrome://browser/skin/feeds/audioFeedIcon16.png                 chrome://browser/skin/feeds/feedIcon16.png
 % override chrome://browser/skin/feeds/videoFeedIcon.png                   chrome://browser/skin/feeds/feedIcon.png

new file mode 100644
--- /dev/null
+++ b/browser/themes/osx/share.svg
@@ -0,0 +1,7 @@
+<!-- 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" width="16" height="16" viewBox="0 0 16 16">
+  <path fill="context-fill" d="M12.707 4.294l-4-4A1 1 0 0 0 8.38.077a.984.984 0 0 0-.246-.05A.938.938 0 0 0 8 0a.938.938 0 0 0-.134.027.984.984 0 0 0-.246.05A1 1 0 0 0 7.291.3l-4 4a1 1 0 0 0 1.416 1.408L7 3.415V11a1 1 0 0 0 2 0V3.415l2.293 2.293a1 1 0 0 0 1.414-1.414z"></path>
+  <path fill="context-fill" d="M14 9a1 1 0 0 0-1 1v3a1 1 0 0 1-1 1H4a1 1 0 0 1-1-1v-3a1 1 0 0 0-2 0v3a3 3 0 0 0 3 3h8a3 3 0 0 0 3-3v-3a1 1 0 0 0-1-1z"></path>
+</svg>

--- a/widget/cocoa/moz.build
+++ b/widget/cocoa/moz.build
@@ -34,16 +34,17 @@ UNIFIED_SOURCES += [
     'nsColorPicker.mm',
     'nsCursorManager.mm',
     'nsDeviceContextSpecX.mm',
     'nsFilePicker.mm',
     'nsIdleServiceX.mm',
     'nsLookAndFeel.mm',
     'nsMacCursor.mm',
     'nsMacDockSupport.mm',
+    'nsMacSharingService.mm',
     'nsMacWebAppUtils.mm',
     'nsMenuBarX.mm',
     'nsMenuGroupOwnerX.mm',
     'nsMenuItemIconX.mm',
     'nsMenuItemX.mm',
     'nsMenuUtilsX.mm',
     'nsMenuX.mm',
     'nsPrintDialogX.mm',

new file mode 100644
--- /dev/null
+++ b/widget/cocoa/nsMacSharingService.h
@@ -0,0 +1,23 @@
+/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
+/* 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/. */
+
+#ifndef nsMacSharingService_h_
+#define nsMacSharingService_h_
+
+#include "nsIMacSharingService.h"
+
+class nsMacSharingService : public nsIMacSharingService
+{
+public:
+  nsMacSharingService() {}
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIMACSHARINGSERVICE
+
+protected:
+  virtual ~nsMacSharingService() {}
+};
+
+#endif // nsMacSharingService_h_

new file mode 100644
--- /dev/null
+++ b/widget/cocoa/nsMacSharingService.mm
@@ -0,0 +1,92 @@
+/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
+/* 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/. */
+
+#import <Cocoa/Cocoa.h>
+
+#include "nsMacSharingService.h"
+#include "nsCocoaUtils.h"
+#include "mozilla/MacStringHelpers.h"
+
+NS_IMPL_ISUPPORTS(nsMacSharingService, nsIMacSharingService)
+
+static NSString*
+NSImageToBase64(const NSImage* aImage)
+{
+  [aImage lockFocus];
+  NSBitmapImageRep* bitmapRep = [[NSBitmapImageRep alloc] initWithFocusedViewRect:NSMakeRect(0, 0, aImage.size.width, aImage.size.height)];
+  [aImage unlockFocus];
+  NSData* imageData = [bitmapRep representationUsingType:NSPNGFileType properties:@{}];
+  [bitmapRep release];
+  NSString* base64Encoded = [imageData base64EncodedStringWithOptions:0];
+  return [NSString stringWithFormat: @"data:image/png;base64,%@", base64Encoded];
+}
+
+static void
+SetStrAttribute(JSContext* aCx,
+                JS::Rooted<JSObject*>& aObj,
+                const char* aKey, NSString* aVal)
+{
+  nsAutoString strVal;
+  mozilla::CopyCocoaStringToXPCOMString(aVal, strVal);
+  JS::Rooted<JSString*> title(aCx, JS_NewUCStringCopyZ(aCx, strVal.get()));
+  JS::Rooted<JS::Value> attVal(aCx, JS::StringValue(title));
+  JS_SetProperty(aCx, aObj, aKey, attVal);
+}
+
+nsresult
+nsMacSharingService::GetSharingProviders(const nsAString& aUrlToShare,
+                                         JSContext* aCx,
+                                         JS::MutableHandleValue aResult)
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
+
+  JS::Rooted<JSObject*> array(aCx, JS_NewArrayObject(aCx, 0));
+  NSURL* url = [NSURL URLWithString:nsCocoaUtils::ToNSString(aUrlToShare)];
+
+  NSArray* sharingService = [NSSharingService
+                             sharingServicesForItems:[NSArray arrayWithObject:url]];
+  int32_t serviceCount = 0;
+
+  for (NSSharingService *currentService in sharingService) {
+
+    JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+
+    SetStrAttribute(aCx, obj, "title", currentService.title);
+    SetStrAttribute(aCx, obj, "menuItemTitle", currentService.menuItemTitle);
+    SetStrAttribute(aCx, obj, "image", NSImageToBase64(currentService.image));
+
+    JS::Rooted<JS::Value> element(aCx, JS::ObjectValue(*obj));
+    JS_SetElement(aCx, array, serviceCount++, element);
+  }
+
+  aResult.setObject(*array);
+
+  return NS_OK;
+  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
+}
+
+NS_IMETHODIMP
+nsMacSharingService::ShareUrl(const nsAString& aShareTitle,
+                              const nsAString& aUrlToShare)
+{
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT;
+
+  NSString* titleString = nsCocoaUtils::ToNSString(aShareTitle);
+  NSURL* url = [NSURL URLWithString:nsCocoaUtils::ToNSString(aUrlToShare)];
+
+  NSArray* sharingService = [NSSharingService
+                             sharingServicesForItems:[NSArray arrayWithObject:url]];
+
+  for (NSSharingService *currentService in sharingService) {
+    if ([currentService.title isEqualToString:titleString]) {
+      [currentService performWithItems:@[url]];
+      break;
+    }
+  }
+
+  return NS_OK;
+
+  NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
+}

--- a/widget/cocoa/nsPrintDialogX.mm
+++ b/widget/cocoa/nsPrintDialogX.mm
@@ -1,14 +1,15 @@
 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* 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 "mozilla/ArrayUtils.h"
+#include "mozilla/gfx/PrintTargetCG.h"
 #include "mozilla/Preferences.h"
 
 #include "nsPrintDialogX.h"
 #include "nsIPrintSettings.h"
 #include "nsIPrintSettingsService.h"
 #include "nsPrintSettingsX.h"
 #include "nsCOMPtr.h"
 #include "nsQueryObject.h"
@@ -17,16 +18,17 @@
 #include "nsIStringBundle.h"
 #include "nsIWebBrowserPrint.h"
 #include "nsCRT.h"
 
 #import <Cocoa/Cocoa.h>
 #include "nsObjCExceptions.h"
 
 using namespace mozilla;
+using mozilla::gfx::PrintTarget;
 
 NS_IMPL_ISUPPORTS(nsPrintDialogServiceX, nsIPrintDialogService)
 
 nsPrintDialogServiceX::nsPrintDialogServiceX()
 {
 }
 
 nsPrintDialogServiceX::~nsPrintDialogServiceX()

--- a/widget/cocoa/nsWidgetFactory.mm
+++ b/widget/cocoa/nsWidgetFactory.mm
@@ -89,16 +89,19 @@ NS_GENERIC_FACTORY_CONSTRUCTOR(nsNativeM
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsBidiKeyboard)
 
 #include "nsNativeThemeCocoa.h"
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsNativeThemeCocoa)
 
 #include "nsMacDockSupport.h"
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsMacDockSupport)
 
+#include "nsMacSharingService.h"
+NS_GENERIC_FACTORY_CONSTRUCTOR(nsMacSharingService)
+
 #include "nsMacWebAppUtils.h"
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsMacWebAppUtils)
 
 #include "nsStandaloneNativeMenu.h"
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsStandaloneNativeMenu)
 
 #include "nsSystemStatusBarCocoa.h"
 NS_GENERIC_FACTORY_CONSTRUCTOR(nsSystemStatusBarCocoa)
@@ -129,16 +132,17 @@ NS_DEFINE_NAMED_CID(NS_SCREENMANAGER_CID
 NS_DEFINE_NAMED_CID(NS_DEVICE_CONTEXT_SPEC_CID);
 NS_DEFINE_NAMED_CID(NS_PRINTSESSION_CID);
 NS_DEFINE_NAMED_CID(NS_PRINTSETTINGSSERVICE_CID);
 NS_DEFINE_NAMED_CID(NS_PRINTDIALOGSERVICE_CID);
 NS_DEFINE_NAMED_CID(NS_IDLE_SERVICE_CID);
 NS_DEFINE_NAMED_CID(NS_SYSTEMALERTSSERVICE_CID);
 NS_DEFINE_NAMED_CID(NS_NATIVEMENUSERVICE_CID);
 NS_DEFINE_NAMED_CID(NS_MACDOCKSUPPORT_CID);
+NS_DEFINE_NAMED_CID(NS_MACSHARINGSERVICE_CID);
 NS_DEFINE_NAMED_CID(NS_MACWEBAPPUTILS_CID);
 NS_DEFINE_NAMED_CID(NS_STANDALONENATIVEMENU_CID);
 NS_DEFINE_NAMED_CID(NS_MACSYSTEMSTATUSBAR_CID);
 NS_DEFINE_NAMED_CID(NS_GFXINFO_CID);
 
 static const mozilla::Module::CIDEntry kWidgetCIDs[] = {
   { &kNS_WINDOW_CID, false, NULL, nsCocoaWindowConstructor },
   { &kNS_POPUP_CID, false, NULL, nsCocoaWindowConstructor },
@@ -165,16 +169,17 @@ static const mozilla::Module::CIDEntry k
   { &kNS_DEVICE_CONTEXT_SPEC_CID, false, NULL, nsDeviceContextSpecXConstructor },
   { &kNS_PRINTSESSION_CID, false, NULL, nsPrintSessionConstructor },
   { &kNS_PRINTSETTINGSSERVICE_CID, false, NULL, nsPrintSettingsServiceXConstructor },
   { &kNS_PRINTDIALOGSERVICE_CID, false, NULL, nsPrintDialogServiceXConstructor },
   { &kNS_IDLE_SERVICE_CID, false, NULL, nsIdleServiceXConstructor },
   { &kNS_SYSTEMALERTSSERVICE_CID, false, NULL, OSXNotificationCenterConstructor },
   { &kNS_NATIVEMENUSERVICE_CID, false, NULL, nsNativeMenuServiceXConstructor },
   { &kNS_MACDOCKSUPPORT_CID, false, NULL, nsMacDockSupportConstructor },
+  { &kNS_MACSHARINGSERVICE_CID, false, NULL, nsMacSharingServiceConstructor },
   { &kNS_MACWEBAPPUTILS_CID, false, NULL, nsMacWebAppUtilsConstructor },
   { &kNS_STANDALONENATIVEMENU_CID, false, NULL, nsStandaloneNativeMenuConstructor },
   { &kNS_MACSYSTEMSTATUSBAR_CID, false, NULL, nsSystemStatusBarCocoaConstructor },
   { &kNS_GFXINFO_CID, false, NULL, mozilla::widget::GfxInfoConstructor },
   { NULL }
 };
 
 static const mozilla::Module::ContractIDEntry kWidgetContracts[] = {
@@ -203,16 +208,17 @@ static const mozilla::Module::ContractID
   { "@mozilla.org/gfx/devicecontextspec;1", &kNS_DEVICE_CONTEXT_SPEC_CID },
   { "@mozilla.org/gfx/printsession;1", &kNS_PRINTSESSION_CID },
   { "@mozilla.org/gfx/printsettings-service;1", &kNS_PRINTSETTINGSSERVICE_CID },
   { NS_PRINTDIALOGSERVICE_CONTRACTID, &kNS_PRINTDIALOGSERVICE_CID },
   { "@mozilla.org/widget/idleservice;1", &kNS_IDLE_SERVICE_CID },
   { "@mozilla.org/system-alerts-service;1", &kNS_SYSTEMALERTSSERVICE_CID },
   { "@mozilla.org/widget/nativemenuservice;1", &kNS_NATIVEMENUSERVICE_CID },
   { "@mozilla.org/widget/macdocksupport;1", &kNS_MACDOCKSUPPORT_CID },
+  { "@mozilla.org/widget/macsharingservice;1", &kNS_MACSHARINGSERVICE_CID },
   { "@mozilla.org/widget/mac-web-app-utils;1", &kNS_MACWEBAPPUTILS_CID },
   { "@mozilla.org/widget/standalonenativemenu;1", &kNS_STANDALONENATIVEMENU_CID },
   { "@mozilla.org/widget/macsystemstatusbar;1", &kNS_MACSYSTEMSTATUSBAR_CID },
   { "@mozilla.org/gfx/info;1", &kNS_GFXINFO_CID },
   { NULL }
 };
 
 static void

--- a/widget/moz.build
+++ b/widget/moz.build
@@ -54,16 +54,17 @@ if toolkit == 'windows':
         'nsITaskbarTabPreview.idl',
         'nsITaskbarWindowPreview.idl',
         'nsIWindowsUIUtils.idl',
         'nsIWinTaskbar.idl',
     ]
 elif toolkit == 'cocoa':
     XPIDL_SOURCES += [
         'nsIMacDockSupport.idl',
+        'nsIMacSharingService.idl',
         'nsIMacWebAppUtils.idl',
         'nsIStandaloneNativeMenu.idl',
         'nsISystemStatusBar.idl',
         'nsITaskbarProgress.idl',
     ]
     EXPORTS += [
         'nsINativeMenuService.h',
     ]

new file mode 100644
--- /dev/null
+++ b/widget/nsIMacSharingService.idl
@@ -0,0 +1,23 @@
+/* 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 "nsISupports.idl"
+
+/**
+ * Allow applications to interface with the Mac OS X Sharing APIs.
+ */
+
+[scriptable, uuid(de59fe1a-46c8-490f-b04d-34545acb06c9)]
+interface nsIMacSharingService : nsISupports
+{
+  /**
+   * Get list of sharing providers
+   */
+  [implicit_jscontext] jsval getSharingProviders(in AString urlToShare);
+
+  /**
+   * Launch service with shareTitle with given url
+   */
+  void shareUrl(in AString shareTitle, in AString urlToShare);
+};

--- a/widget/nsWidgetsCID.h
+++ b/widget/nsWidgetsCID.h
@@ -70,16 +70,21 @@
 { 0x1F39AE50, 0xB6A0, 0x4B37,                         \
   { 0x90, 0xF4, 0x60, 0xAF, 0x61, 0x41, 0x93, 0xD8 }}
 
 // {2451BAED-8DC3-46D9-9E30-96E1BAA03666}
 #define NS_MACDOCKSUPPORT_CID \
 { 0x2451BAED, 0x8DC3, 0x46D9, \
   { 0x9E, 0x30, 0x96, 0xE1, 0xBA, 0xA0, 0x36, 0x66 } }
 
+// {de59fe1a-46c8-490f-b04d-34545acb06c9}
+#define NS_MACSHARINGSERVICE_CID \
+{ 0xde59fe1a, 0x46c8, 0x490f, \
+  { 0xb0, 0x4d, 0x34, 0x54, 0x5a, 0xcb, 0x06, 0xc9 } }
+
 // {b6e1a890-b2b8-4883-a65f-9476f6185313}
 #define NS_MACSYSTEMSTATUSBAR_CID \
 { 0xb6e1a890, 0xb2b8, 0x4883, \
   { 0xa6, 0x5f, 0x94, 0x76, 0xf6, 0x18, 0x53, 0x13 } }
 
 //-----------------------------------------------------------
 //Drag & Drop & Clipboard
 //-----------------------------------------------------------

new file mode 100644
--- /dev/null
+++ b/widget/tests/unit/test_macsharingservice.js
@@ -0,0 +1,27 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* 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/. */
+
+//Basic tests to verify that MacSharingService returns expected data
+
+ChromeUtils.import("resource://gre/modules/Services.jsm");
+ChromeUtils.import("resource://gre/modules/XPCOMUtils.jsm");
+
+function test_getSharingProviders()
+{
+  let sharingService = Cc["@mozilla.org/widget/macsharingservice;1"].
+      getService(Ci.nsIMacSharingService);
+  let providers = sharingService.getSharingProviders("http://example.org");
+  Assert.ok(providers.length > 1, "There are providers returned");
+  providers.forEach(provider => {
+    Assert.ok("title" in provider, "Provider has title");
+    Assert.ok("menuItemTitle" in provider, "Provider has menuItemTitle");
+    Assert.ok("image" in provider, "Provider has image");
+  });
+}
+
+function run_test()
+{
+  test_getSharingProviders();
+}

--- a/widget/tests/unit/xpcshell.ini
+++ b/widget/tests/unit/xpcshell.ini
@@ -1,6 +1,8 @@
 [DEFAULT]
 head = 
 
 [test_taskbar_jumplistitems.js]
+[test_macsharingservice.js]
+skip-if = os != "mac"
 [test_macwebapputils.js]
 skip-if = os != "mac"