--- a/browser/base/content/browser.xul
+++ b/browser/base/content/browser.xul
@@ -982,26 +982,36 @@
              nowindowdrag="true"
              hidden="true">
       <vbox flex="1">
         <resizer id="inspector-top-resizer" flex="1" 
                  class="inspector-resizer"
                  dir="top" disabled="true"
                  element="inspector-tree-box"/>
         <hbox>
+#ifdef XP_MACOSX
+          <toolbarbutton id="highlighter-closebutton"
+                         oncommand="InspectorUI.closeInspectorUI(false);"
+                         tooltiptext="&inspectCloseButton.tooltiptext;"/>
+#endif
           <toolbarbutton id="inspector-inspect-toolbutton"
                          label="&inspectButton.label;"
                          accesskey="&inspectButton.accesskey;"
                          command="Inspector:Inspect"/>
           <arrowscrollbox id="inspector-breadcrumbs"
                           flex="1" orient="horizontal"
                           clicktoscroll="true"/>
           <hbox id="inspector-tools">
             <!-- registered tools go here -->
           </hbox>
+#ifndef XP_MACOSX
+          <toolbarbutton id="highlighter-closebutton"
+                         oncommand="InspectorUI.closeInspectorUI(false);"
+                         tooltiptext="&inspectCloseButton.tooltiptext;"/>
+#endif
           <resizer id="inspector-end-resizer"
                    class="inspector-resizer"
                    dir="top" disabled="true"
                    element="inspector-tree-box"/>
         </hbox>
       </vbox>
     </toolbar>
     <toolbar id="addon-bar"

--- a/browser/base/content/highlighter.css
+++ b/browser/base/content/highlighter.css
@@ -25,24 +25,27 @@
 #highlighter-veil-rightbox {
   -moz-box-flex: 1;
 }
 
 #highlighter-veil-middlebox:-moz-locale-dir(rtl) {
   -moz-box-direction: reverse;
 }
 
-#highlighter-close-button {
-  position: absolute;
-  pointer-events: auto;
-  z-index: 1;
+.inspector-breadcrumbs-button {
+  direction: ltr;
 }
 
-.inspector-breadcrumbs-button {
-  direction: ltr;
+.inspector-resizer {
+  display: none;
+}
+
+#inspector-toolbar[treepanel-open] > vbox > #inspector-top-resizer,
+#inspector-toolbar[treepanel-open] > vbox > hbox > #inspector-end-resizer {
+  display: -moz-box;
 }
 
 /*
  * Node Infobar
  */
 
 #highlighter-nodeinfobar-container {
   position: absolute;

--- a/browser/devtools/highlighter/TreePanel.jsm
+++ b/browser/devtools/highlighter/TreePanel.jsm
@@ -226,22 +226,17 @@ TreePanel.prototype = {
       this.IUI.browser.ownerDocument.getElementById("browser-bottombox");
     treeBox = this.document.createElement("vbox");
     treeBox.id = "inspector-tree-box";
     treeBox.state = "open"; // for the registerTools API.
     treeBox.minHeight = 10;
     treeBox.flex = 1;
     toolbarParent.insertBefore(treeBox, toolbar);
 
-    let resizerTop =
-      this.IUI.browser.ownerDocument.getElementById("inspector-top-resizer");
-    let resizerEnd =
-      this.IUI.browser.ownerDocument.getElementById("inspector-end-resizer");
-    resizerTop.removeAttribute("disabled");
-    resizerEnd.removeAttribute("disabled");
+    this.IUI.toolbar.setAttribute("treepanel-open", "true");
 
     treeBox.appendChild(this.treeIFrame);
 
     let boundLoadedInitializeTreePanel = function loadedInitializeTreePanel()
     {
       this.treeIFrame.removeEventListener("load",
         boundLoadedInitializeTreePanel, true);
       this.initializeIFrame();
@@ -259,22 +254,17 @@ TreePanel.prototype = {
   },
 
   /**
    * Close the TreePanel.
    */
   close: function TP_close()
   {
     if (this.openInDock) {
-      let resizerTop = 
-        this.IUI.browser.ownerDocument.getElementById("inspector-top-resizer");
-      let resizerEnd = 
-        this.IUI.browser.ownerDocument.getElementById("inspector-end-resizer");
-      resizerTop.setAttribute("disabled", "true");
-      resizerEnd.setAttribute("disabled", "true");
+      this.IUI.toolbar.removeAttribute("treepanel-open");
 
       let treeBox = this.container;
       let treeBoxParent = treeBox.parentNode;
       treeBoxParent.removeChild(treeBox);
     } else {
       this.container.hidePopup();
     }
 

--- a/browser/devtools/highlighter/inspector.jsm
+++ b/browser/devtools/highlighter/inspector.jsm
@@ -119,30 +119,30 @@ Highlighter.prototype = {
     this._highlighting = false;
 
     this.highlighterContainer = this.chromeDoc.createElement("stack");
     this.highlighterContainer.id = "highlighter-container";
 
     this.veilContainer = this.chromeDoc.createElement("vbox");
     this.veilContainer.id = "highlighter-veil-container";
 
+    // The controlsBox will host the different interactive
+    // elements of the highlighter (buttons, toolbars, ...).
     let controlsBox = this.chromeDoc.createElement("box");
     controlsBox.id = "highlighter-controls";
     this.highlighterContainer.appendChild(this.veilContainer);
     this.highlighterContainer.appendChild(controlsBox);
 
     stack.appendChild(this.highlighterContainer);
 
     // The veil will make the whole page darker except
     // for the region of the selected box.
     this.buildVeil(this.veilContainer);
 
-    // The controlsBox will host the different interactive
-    // elements of the highlighter (buttons, toolbars, ...).
-    this.buildControls(controlsBox);
+    this.buildInfobar(controlsBox);
 
     this.browser.addEventListener("resize", this, true);
     this.browser.addEventListener("scroll", this, true);
 
     this.handleResize();
   },
 
   /**
@@ -196,30 +196,16 @@ Highlighter.prototype = {
     this.veilMiddleBox.appendChild(veilRightBox);
 
     aParent.appendChild(this.veilTopBox);
     aParent.appendChild(this.veilMiddleBox);
     aParent.appendChild(veilBottomBox);
   },
 
   /**
-   * Build the controls:
-   *
-   * <box id="highlighter-close-button"/>
-   *
-   * @param nsIDOMElement aParent
-   *        The container of the controls elements.
-   */
-  buildControls: function Highlighter_buildControls(aParent)
-  {
-    this.buildCloseButton(aParent);
-    this.buildInfobar(aParent);
-  },
-
-  /**
    * Build the node Infobar.
    *
    * <box id="highlighter-nodeinfobar-container">
    *   <box id="Highlighter-nodeinfobar-arrow-top"/>
    *   <vbox id="highlighter-nodeinfobar">
    *     <label id="highlighter-nodeinfobar-tagname"/>
    *     <label id="highlighter-nodeinfobar-id"/>
    *     <vbox id="highlighter-nodeinfobar-classes"/>
@@ -275,48 +261,23 @@ Highlighter.prototype = {
       idLabel: idLabel,
       classesBox: classesBox,
       container: container,
       barHeight: barHeight,
     };
   },
 
   /**
-   * Build the close button.
-   *
-   * @param nsIDOMElement aParent
-   *        The container of the close-button.
-   */
-  buildCloseButton: function Highlighter_buildCloseButton(aParent)
-  {
-    let closeButton = this.chromeDoc.createElement("box");
-    closeButton.id = "highlighter-close-button";
-    closeButton.appendChild(this.chromeDoc.createElement("image"));
-
-    let boundCloseEventHandler = this.IUI.closeInspectorUI.bind(this.IUI, false);
-
-    closeButton.addEventListener("click", boundCloseEventHandler, false);
-
-    aParent.appendChild(closeButton);
-
-    this.boundCloseEventHandler = boundCloseEventHandler;
-    this.closeButton = closeButton;
-  },
-
-  /**
    * Destroy the nodes.
    */
   destroy: function Highlighter_destroy()
   {
     this.browser.removeEventListener("scroll", this, true);
     this.browser.removeEventListener("resize", this, true);
-    this.closeButton.removeEventListener("click", this.boundCloseEventHandler, false);
     this.boundCloseEventHandler = null;
-    this.closeButton.parentNode.removeChild(this.closeButton);
-    this.closeButton = null;
     this._contentRect = null;
     this._highlightRect = null;
     this._highlighting = false;
     this.veilTopBox = null;
     this.veilLeftBox = null;
     this.veilMiddleBox = null;
     this.veilTransparentBox = null;
     this.veilContainer = null;

--- a/browser/devtools/highlighter/test/browser_inspector_bug_690361.js
+++ b/browser/devtools/highlighter/test/browser_inspector_bug_690361.js
@@ -77,17 +77,17 @@ function runInspectorTests()
   ok(!InspectorUI.toolbar.hidden, "toolbar is visible");
   ok(InspectorUI.inspecting, "Inspector is inspecting");
   ok(!InspectorUI.treePanel.isOpen(), "Inspector Tree Panel is not open");
   ok(InspectorUI.highlighter, "Highlighter is up");
 
   salutation = doc.getElementById("salutation");
   InspectorUI.inspectNode(salutation);
 
-  let button = document.getElementById("highlighter-close-button");
+  let button = document.getElementById("highlighter-closebutton");
   button.click();
 }
 
 function closeInspectorTests()
 {
   Services.obs.removeObserver(closeInspectorTests,
     InspectorUI.INSPECTOR_NOTIFICATIONS.CLOSED);
   Services.obs.addObserver(inspectorOpenedTrap,

--- a/browser/devtools/jar.mn
+++ b/browser/devtools/jar.mn
@@ -1,10 +1,11 @@
 browser.jar:
 *   content/browser/inspector.html                (highlighter/inspector.html)
     content/browser/NetworkPanel.xhtml            (webconsole/NetworkPanel.xhtml)
 *   content/browser/scratchpad.xul                (scratchpad/scratchpad.xul)
 *   content/browser/scratchpad.js                 (scratchpad/scratchpad.js)
     content/browser/csshtmltree.xhtml             (styleinspector/csshtmltree.xhtml)
+    content/browser/devtools/cssruleview.xhtml    (styleinspector/cssruleview.xhtml)
+    content/browser/devtools/styleinspector.css   (styleinspector/styleinspector.css)
     content/browser/orion.js                      (sourceeditor/orion/orion.js)
     content/browser/orion.css                     (sourceeditor/orion/orion.css)
     content/browser/orion-mozilla.css             (sourceeditor/orion/mozilla.css)
-

--- a/browser/devtools/sourceeditor/orion/mozilla.css
+++ b/browser/devtools/sourceeditor/orion/mozilla.css
@@ -1,11 +1,14 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
+.viewContainer {
+  font-size: inherit; /* inherit browser's default monospace font size */
+}
 
 .rulerLines {
   background: -moz-Dialog;
   color: -moz-DialogText;
   min-width: 1.4em;
   padding-left: 4px;
   padding-right: 4px;
   text-align: end;

--- a/browser/devtools/styleinspector/CssLogic.jsm
+++ b/browser/devtools/styleinspector/CssLogic.jsm
@@ -816,16 +816,46 @@ CssLogic.sheetMediaAllowed = function Cs
   } else {
     result = true;
   }
 
   return result;
 };
 
 /**
+ * Return a shortened version of a style sheet's source.
+ *
+ * @param {CSSStyleSheet} aSheet the DOM object for the style sheet.
+ */
+CssLogic.shortSource = function CssLogic_shortSource(aSheet)
+{
+    // Use a string like "inline" if there is no source href
+    if (!aSheet || !aSheet.href) {
+      return CssLogic.l10n("rule.sourceInline");
+    }
+
+    // We try, in turn, the filename, filePath, query string, whole thing
+    let url = Services.io.newURI(aSheet.href, null, null);
+    url = url.QueryInterface(Ci.nsIURL);
+    if (url.fileName) {
+      return url.fileName;
+    }
+
+    if (url.filePath) {
+      return url.filePath;
+    }
+
+    if (url.query) {
+      return url.query;
+    }
+
+    return this.domSheet.href;
+}
+
+/**
  * A safe way to access cached bits of information about a stylesheet.
  *
  * @constructor
  * @param {CssLogic} aCssLogic pointer to the CssLogic instance working with
  * this CssSheet object.
  * @param {CSSStyleSheet} aDomSheet reference to a DOM CSSStyleSheet object.
  * @param {boolean} aSystemSheet tells if the stylesheet is system-provided.
  * @param {number} aIndex tells the index/position of the stylesheet within the
@@ -880,41 +910,17 @@ CssSheet.prototype = {
    * @return {string} the shorthand source of the stylesheet.
    */
   get shortSource()
   {
     if (this._shortSource) {
       return this._shortSource;
     }
 
-    // Use a string like "inline" if there is no source href
-    if (!this.domSheet.href) {
-      this._shortSource = CssLogic.l10n("rule.sourceInline");
-      return this._shortSource;
-    }
-
-    // We try, in turn, the filename, filePath, query string, whole thing
-    let url = Services.io.newURI(this.domSheet.href, null, null);
-    url = url.QueryInterface(Ci.nsIURL);
-    if (url.fileName) {
-      this._shortSource = url.fileName;
-      return this._shortSource;
-    }
-
-    if (url.filePath) {
-      this._shortSource = url.filePath;
-      return this._shortSource;
-    }
-
-    if (url.query) {
-      this._shortSource = url.query;
-      return this._shortSource;
-    }
-
-    this._shortSource = this.domSheet.href;
+    this._shortSource = CssLogic.shortSource(this.domSheet);
     return this._shortSource;
   },
 
   /**
    * Tells if the sheet is allowed or not by the current CssLogic.sourceFilter.
    *
    * @return {boolean} true if the stylesheet is allowed by the sourceFilter, or
    * false otherwise.

new file mode 100644
--- /dev/null
+++ b/browser/devtools/styleinspector/CssRuleView.jsm
@@ -0,0 +1,1248 @@
+/* -*- Mode: javascript; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Mozilla Inspector Module.
+ *
+ * The Initial Developer of the Original Code is
+ * The Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2011
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Dave Camp (dcamp@mozilla.com) (Original Author)
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+"use strict"
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+
+const HTML_NS = "http://www.w3.org/1999/xhtml";
+const XUL_NS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
+
+const FOCUS_FORWARD = Ci.nsIFocusManager.MOVEFOCUS_FORWARD;
+const FOCUS_BACKWARD = Ci.nsIFocusManager.MOVEFOCUS_BACKWARD;
+
+/**
+ * These regular expressions are adapted from firebug's css.js, and are
+ * used to parse CSSStyleDeclaration's cssText attribute.
+ */
+
+// Used to split on css line separators
+const CSS_LINE_RE = /(?:[^;\(]*(?:\([^\)]*?\))?[^;\(]*)*;?/g;
+
+// Used to parse a single property line.
+const CSS_PROP_RE = /\s*([^:\s]*)\s*:\s*(.*?)\s*(?:! (important))?;?$/;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource:///modules/devtools/CssLogic.jsm");
+
+var EXPORTED_SYMBOLS = ["CssRuleView",
+                        "_ElementStyle",
+                        "_editableField"];
+
+/**
+ * Our model looks like this:
+ *
+ * ElementStyle:
+ *   Responsible for keeping track of which properties are overridden.
+ *   Maintains a list of Rule objects that apply to the element.
+ * Rule:
+ *   Manages a single style declaration or rule.
+ *   Responsible for applying changes to the properties in a rule.
+ *   Maintains a list of TextProperty objects.
+ * TextProperty:
+ *   Manages a single property from the cssText attribute of the
+ *     relevant declaration.
+ *   Maintains a list of computed properties that come from this
+ *     property declaration.
+ *   Changes to the TextProperty are sent to its related Rule for
+ *     application.
+ */
+
+/**
+ * ElementStyle maintains a list of Rule objects for a given element.
+ *
+ * @constructor
+ */
+function ElementStyle(aElement)
+{
+  this.element = aElement;
+  let doc = aElement.ownerDocument;
+
+  // To figure out how shorthand properties are interpreted by the
+  // engine, we will set properties on a dummy element and observe
+  // how their .style attribute reflects them as computed values.
+  this.dummyElement = doc.createElementNS(this.element.namespaceURI,
+                                          this.element.tagName);
+  this._populate();
+}
+// We're exporting _ElementStyle for unit tests.
+var _ElementStyle = ElementStyle;
+
+ElementStyle.prototype = {
+
+  // The element we're looking at.
+  element: null,
+
+  // Empty, unconnected element of the same type as this node, used
+  // to figure out how shorthand properties will be parsed.
+  dummyElement: null,
+
+  domUtils: Cc["@mozilla.org/inspector/dom-utils;1"].getService(Ci.inIDOMUtils),
+
+  /**
+   * Refresh the list of rules to be displayed for the active element.
+   * Upon completion, this.rules[] will hold a list of Rule objects.
+   */
+  _populate: function ElementStyle_populate()
+  {
+    this.rules = [];
+
+    // Include the element's style first.
+    this.rules.push(new Rule(this, {
+      style: this.element.style,
+      selectorText: CssLogic.l10n("rule.sourceElement")
+    }));
+
+    // Get the styles that apply to the element.
+    try {
+      var domRules = this.domUtils.getCSSStyleRules(this.element);
+    } catch (ex) {
+      Services.console.logStringMessage("ElementStyle_populate error: " + ex);
+      return;
+    }
+
+    // getCSStyleRules returns ordered from least-specific to
+    // most-specific.
+    for (let i = domRules.Count() - 1; i >= 0; i--) {
+      let domRule = domRules.GetElementAt(i);
+
+      // XXX: Optionally provide access to system sheets.
+      let systemSheet = CssLogic.isSystemStyleSheet(domRule.parentStyleSheet);
+      if (systemSheet) {
+        continue;
+      }
+
+      // XXX: non-style rules.
+      if (domRule.type === Ci.nsIDOMCSSRule.STYLE_RULE) {
+        this.rules.push(new Rule(this, { domRule: domRule }));
+      }
+    }
+
+    // Mark overridden computed styles.
+    this.markOverridden();
+  },
+
+  /**
+   * Mark the properties listed in this.rules with an overridden flag
+   * if an earlier property overrides it.
+   */
+  markOverridden: function ElementStyle_markOverridden()
+  {
+    // Gather all the text properties applied by these rules, ordered
+    // from more- to less-specific.
+    let textProps = [];
+    for each (let rule in this.rules) {
+      textProps = textProps.concat(rule.textProps.slice(0).reverse());
+    }
+
+    // Gather all the computed properties applied by those text
+    // properties.
+    let computedProps = [];
+    for each (let textProp in textProps) {
+      computedProps = computedProps.concat(textProp.computed);
+    };
+
+    // Walk over the computed properties.  As we see a property name
+    // for the first time, mark that property's name as taken by this
+    // property.
+    //
+    // If we come across a property whose name is already taken, check
+    // its priority against the property that was found first:
+    //
+    //   If the new property is a higher priority, mark the old
+    //   property overridden and mark the property name as taken by
+    //   the new property.
+    //
+    //   If the new property is a lower or equal priority, mark it as
+    //   overridden.
+    //
+    // _overriddenDirty will be set on each prop, indicating whether its
+    // dirty status changed during this pass.
+    let taken = {};
+    for each (let computedProp in computedProps) {
+      let earlier = taken[computedProp.name];
+      let overridden;
+      if (earlier
+          && computedProp.priority === "important"
+          && earlier.priority !== "important") {
+        // New property is higher priority.  Mark the earlier property
+        // overridden (which will reverse its dirty state).
+        earlier._overriddenDirty = !earlier._overriddenDirty;
+        earlier.overridden = true;
+        overridden = false;
+      } else {
+        overridden = !!earlier;
+      }
+
+      computedProp._overriddenDirty = (!!computedProp.overridden != overridden);
+      computedProp.overridden = overridden;
+      if (!computedProp.overridden) {
+        taken[computedProp.name] = computedProp;
+      }
+    }
+
+    // For each TextProperty, mark it overridden if all of its
+    // computed properties are marked overridden.  Update the text
+    // property's associated editor, if any.  This will clear the
+    // _overriddenDirty state on all computed properties.
+    for each (let textProp in textProps) {
+      // _updatePropertyOverridden will return true if the
+      // overridden state has changed for the text property.
+      if (this._updatePropertyOverridden(textProp)) {
+        textProp.updateEditor();
+      }
+    }
+  },
+
+  /**
+   * Mark a given TextProperty as overridden or not depending on the
+   * state of its computed properties.  Clears the _overriddenDirty state
+   * on all computed properties.
+   *
+   * @param {TextProperty} aProp
+   *        The text property to update.
+   *
+   * @return True if the TextProperty's overridden state (or any of its
+   *         computed properties overridden state) changed.
+   */
+  _updatePropertyOverridden: function ElementStyle_updatePropertyOverridden(aProp)
+  {
+    let overridden = true;
+    let dirty = false;
+    for each (let computedProp in aProp.computed) {
+      if (!computedProp.overridden) {
+        overridden = false;
+      }
+      dirty = computedProp._overriddenDirty || dirty;
+      delete computedProp._overriddenDirty;
+    }
+
+    dirty = (!!aProp.overridden != overridden) || dirty;
+    aProp.overridden = overridden;
+    return dirty;
+  }
+}
+
+/**
+ * A single style rule or declaration.
+ *
+ * @param {ElementStyle} aElementStyle
+ *        The ElementStyle to which this rule belongs.
+ * @param {object} aOptions
+ *        The information used to construct this rule.  Properties include:
+ *          domRule: the nsIDOMCSSStyleRule to view, if any.
+ *          style: the nsIDOMCSSStyleDeclaration to view.  If omitted,
+ *            the domRule's style will be used.
+ *          selectorText: selector text to display.  If omitted, the domRule's
+ *            selectorText will be used.
+ * @constructor
+ */
+function Rule(aElementStyle, aOptions)
+{
+  this.elementStyle = aElementStyle;
+  this.domRule = aOptions.domRule || null;
+  this.style = aOptions.style || this.domRule.style;
+  this.selectorText = aOptions.selectorText || this.domRule.selectorText;
+
+  this._getTextProperties();
+}
+
+Rule.prototype = {
+  get title()
+  {
+    if (this._title) {
+      return this._title;
+    }
+    let sheet = this.domRule ? this.domRule.parentStyleSheet : null;
+    this._title = CssLogic.shortSource(sheet);
+    if (this.domRule) {
+      let line = this.elementStyle.domUtils.getRuleLine(this.domRule);
+      this._title += ":" + line;
+    }
+    return this._title;
+  },
+
+  /**
+   * Create a new TextProperty to include in the rule.
+   *
+   * @param {string} aName
+   *        The text property name (such as "background" or "border-top").
+   * @param {string} aValue
+   *        The property's value (not including priority).
+   * @param {string} aPriority
+   *        The property's priority (either "important" or an empty string).
+   */
+  createProperty: function Rule_createProperty(aName, aValue, aPriority)
+  {
+    let prop = new TextProperty(this, aName, aValue, aPriority);
+    this.textProps.push(prop);
+    this.applyProperties();
+    return prop;
+  },
+
+  /**
+   * Reapply all the properties in this rule, and update their
+   * computed styles.  Will re-mark overridden properties.
+   */
+  applyProperties: function Rule_applyProperties()
+  {
+    for each (let prop in this.textProps) {
+      if (!prop.enabled) {
+        continue;
+      }
+
+      this.style.setProperty(prop.name, prop.value, prop.priority);
+      // Refresh the property's value from the style, to reflect
+      // any changes made during parsing.
+      prop.value = this.style.getPropertyValue(prop.name);
+      prop.priority = this.style.getPropertyPriority(prop.name);
+      prop.updateComputed();
+    }
+
+    this.elementStyle.markOverridden();
+  },
+
+  /**
+   * Renames a property.
+   *
+   * @param {TextProperty} aProperty
+   *        The property to rename.
+   * @param {string} aName
+   *        The new property name (such as "background" or "border-top").
+   */
+  setPropertyName: function Rule_setPropertyName(aProperty, aName)
+  {
+    if (aName === aProperty.name) {
+      return;
+    }
+    this.style.removeProperty(aProperty.name);
+    aProperty.name = aName;
+    this.applyProperties();
+  },
+
+  /**
+   * Sets the value and priority of a property.
+   *
+   * @param {TextProperty} aProperty
+   *        The property to manipulate.
+   * @param {string} aValue
+   *        The property's value (not including priority).
+   * @param {string} aPriority
+   *        The property's priority (either "important" or an empty string).
+   */
+  setPropertyValue: function Rule_setPropertyValue(aProperty, aValue, aPriority)
+  {
+    if (aValue === aProperty.value && aPriority === aProperty.priority) {
+      return;
+    }
+    aProperty.value = aValue;
+    aProperty.priority = aPriority;
+    this.applyProperties();
+  },
+
+  /**
+   * Disables or enables given TextProperty.
+   */
+  setPropertyEnabled: function Rule_enableProperty(aProperty, aValue)
+  {
+    aProperty.enabled = !!aValue;
+    if (!aProperty.enabled) {
+      this.style.removeProperty(aProperty.name);
+    }
+    this.applyProperties();
+  },
+
+  /**
+   * Remove a given TextProperty from the rule and update the rule
+   * accordingly.
+   */
+  removeProperty: function Rule_removeProperty(aProperty)
+  {
+    this.textProps = this.textProps.filter(function(prop) prop != aProperty);
+    this.style.removeProperty(aProperty);
+    // Need to re-apply properties in case removing this TextProperty
+    // exposes another one.
+    this.applyProperties();
+  },
+
+  /**
+   * Get the list of TextProperties from the style.  Needs
+   * to parse the style's cssText.
+   */
+  _getTextProperties: function Rule_getTextProperties()
+  {
+    this.textProps = [];
+    let lines = this.style.cssText.match(CSS_LINE_RE);
+    for each (let line in lines) {
+      let matches = CSS_PROP_RE.exec(line);
+      if(!matches || !matches[2])
+        continue;
+
+      let prop = new TextProperty(this, matches[1], matches[2], matches[3] || "");
+      this.textProps.push(prop);
+    }
+  },
+}
+
+/**
+ * A single property in a rule's cssText.
+ *
+ * @param {Rule} aRule
+ *        The rule this TextProperty came from.
+ * @param {string} aName
+ *        The text property name (such as "background" or "border-top").
+ * @param {string} aValue
+ *        The property's value (not including priority).
+ * @param {string} aPriority
+ *        The property's priority (either "important" or an empty string).
+ *
+ */
+function TextProperty(aRule, aName, aValue, aPriority)
+{
+  this.rule = aRule;
+  this.name = aName;
+  this.value = aValue;
+  this.priority = aPriority;
+  this.enabled = true;
+  this.updateComputed();
+}
+
+TextProperty.prototype = {
+  /**
+   * Update the editor associated with this text property,
+   * if any.
+   */
+  updateEditor: function TextProperty_updateEditor()
+  {
+    if (this.editor) {
+      this.editor.update();
+    }
+  },
+
+  /**
+   * Update the list of computed properties for this text property.
+   */
+  updateComputed: function TextProperty_updateComputed()
+  {
+    if (!this.name) {
+      return;
+    }
+
+    // This is a bit funky.  To get the list of computed properties
+    // for this text property, we'll set the property on a dummy element
+    // and see what the computed style looks like.
+    let dummyElement = this.rule.elementStyle.dummyElement;
+    let dummyStyle = dummyElement.style;
+    dummyStyle.cssText = "";
+    dummyStyle.setProperty(this.name, this.value, this.priority);
+
+    this.computed = [];
+    for (let i = 0, n = dummyStyle.length; i < n; i++) {
+      let prop = dummyStyle.item(i);
+      this.computed.push({
+        name: prop,
+        value: dummyStyle.getPropertyValue(prop),
+        priority: dummyStyle.getPropertyPriority(prop),
+      });
+    }
+  },
+
+  setValue: function TextProperty_setValue(aValue, aPriority)
+  {
+    this.rule.setPropertyValue(this, aValue, aPriority);
+    this.updateEditor();
+  },
+
+  setName: function TextProperty_setName(aName)
+  {
+    this.rule.setPropertyName(this, aName);
+    this.updateEditor();
+  },
+
+  setEnabled: function TextProperty_setEnabled(aValue)
+  {
+    this.rule.setPropertyEnabled(this, aValue);
+    this.updateEditor();
+  },
+
+  remove: function TextProperty_remove()
+  {
+    this.rule.removeProperty(this);
+  }
+}
+
+
+/**
+ * View hierarchy mostly follows the model hierarchy.
+ *
+ * CssRuleView:
+ *   Owns an ElementStyle and creates a list of RuleEditors for its
+ *    Rules.
+ * RuleEditor:
+ *   Owns a Rule object and creates a list of TextPropertyEditors
+ *     for its TextProperties.
+ *   Manages creation of new text properties.
+ * TextPropertyEditor:
+ *   Owns a TextProperty object.
+ *   Manages changes to the TextProperty.
+ *   Can be expanded to display computed properties.
+ *   Can mark a property disabled or enabled.
+ */
+
+/**
+ * CssRuleView is a view of the style rules and declarations that
+ * apply to a given element.  After construction, the 'element'
+ * property will be available with the user interface.
+ *
+ * @param Document aDocument
+ *        The document that will contain the rule view.
+ * @constructor
+ */
+function CssRuleView(aDoc)
+{
+  this.doc = aDoc;
+
+  this.element = this.doc.createElementNS(HTML_NS, "div");
+  this.element.setAttribute("tabindex", "0");
+  this.element.classList.add("ruleview");
+}
+
+CssRuleView.prototype = {
+  // The element that we're inspecting.
+  _viewedElement: null,
+
+  /**
+   * Update the highlighted element.
+   *
+   * @param {nsIDOMElement} aElement
+   *        The node whose style rules we'll inspect.
+   */
+  highlight: function CssRuleView_highlight(aElement)
+  {
+    if (this._viewedElement === aElement) {
+      return;
+    }
+
+    this.clear();
+
+    this._viewedElement = aElement;
+    if (!this._viewedElement) {
+      return;
+    }
+
+    this._elementStyle = new ElementStyle(aElement);
+    this._createEditors();
+  },
+
+  /**
+   * Clear the rule view.
+   */
+  clear: function CssRuleView_clear()
+  {
+    while (this.element.hasChildNodes()) {
+      this.element.removeChild(this.element.lastChild);
+    }
+    this._viewedElement = null;
+    this._elementStyle = null;
+  },
+
+  /**
+   * Creates editor UI for each of the rules in _elementStyle.
+   */
+  _createEditors: function CssRuleView_createEditors()
+  {
+    for each (let rule in this._elementStyle.rules) {
+      // Don't hold a reference to this editor beyond the one held
+      // by the node.
+      let editor = new RuleEditor(this.doc, rule);
+      this.element.appendChild(editor.element);
+    }
+  },
+};
+
+/**
+ * Create a RuleEditor.
+ *
+ * @param object aDoc
+ *        The document holding this rule editor.
+ * @param Rule aRule
+ *        The Rule object we're editing.
+ * @constructor
+ */
+function RuleEditor(aDoc, aRule)
+{
+  this.doc = aDoc;
+  this.rule = aRule;
+
+  this._onNewProperty = this._onNewProperty.bind(this);
+
+  this._create();
+}
+
+RuleEditor.prototype = {
+  _create: function RuleEditor_create()
+  {
+    this.element = this.doc.createElementNS(HTML_NS, "div");
+    this.element._ruleEditor = this;
+
+    // Add the source link.
+    let source = createChild(this.element, "div", {
+      class: "ruleview-rule-source",
+      textContent: this.rule.title
+    });
+
+    let code = createChild(this.element, "div", {
+      class: "ruleview-code"
+    });
+
+    let header = createChild(code, "div", {});
+
+    let selectors = createChild(header, "span", {
+      class: "ruleview-selector",
+      textContent: this.rule.selectorText
+    });
+    appendText(header, " {");
+
+    this.propertyList = createChild(code, "ul", {
+      class: "ruleview-propertylist"
+    });
+
+    for each (let prop in this.rule.textProps) {
+      let propEditor = new TextPropertyEditor(this, prop);
+      this.propertyList.appendChild(propEditor.element);
+    }
+
+    this.closeBrace = createChild(code, "div", {
+      class: "ruleview-ruleclose",
+      tabindex: "0",
+      textContent: "}"
+    });
+
+    // We made the close brace focusable, tabbing to it
+    // or clicking on it should start the new property editor.
+    this.closeBrace.addEventListener("focus", function() {
+      this.newProperty();
+    }.bind(this), true);
+  },
+
+  /**
+   * Create a text input for a property name.  If a non-empty property
+   * name is given, we'll create a real TextProperty and add it to the
+   * rule.
+   */
+  newProperty: function RuleEditor_newProperty()
+  {
+    // While we're editing a new property, it doesn't make sense to
+    // start a second new property editor, so disable focusing the
+    // close brace for now.
+    this.closeBrace.removeAttribute("tabindex");
+
+    this.newPropItem = createChild(this.propertyList, "li", {
+      class: "ruleview-property ruleview-newproperty",
+    });
+
+    this.newPropSpan = createChild(this.newPropItem, "span", {
+      class: "ruleview-propertyname"
+    });
+
+    new InplaceEditor({
+      element: this.newPropSpan,
+      done: this._onNewProperty,
+      advanceChars: ":"
+    });
+  },
+
+  _onNewProperty: function RuleEditor_onNewProperty(aValue, aCommit)
+  {
+    // We're done, make the close brace focusable again.
+    this.closeBrace.setAttribute("tabindex", "0");
+
+    this.propertyList.removeChild(this.newPropItem);
+    delete this.newPropItem;
+    delete this.newPropSpan;
+
+    if (!aValue || !aCommit) {
+      return;
+    }
+
+    // Create an empty-valued property and start editing it.
+    let prop = this.rule.createProperty(aValue, "", "");
+    let editor = new TextPropertyEditor(this, prop);
+    this.propertyList.appendChild(editor.element);
+    editor.valueSpan.focus();
+  },
+};
+
+/**
+ * Create a TextPropertyEditor.
+ *
+ * @param {RuleEditor} aRuleEditor
+ *        The rule editor that owns this TextPropertyEditor.
+ * @param {TextProperty} aProperty
+ *        The text property to edit.
+ * @constructor
+ */
+function TextPropertyEditor(aRuleEditor, aProperty)
+{
+  this.doc = aRuleEditor.doc;
+  this.prop = aProperty;
+  this.prop.editor = this;
+
+  this._onEnableClicked = this._onEnableClicked.bind(this);
+  this._onExpandClicked = this._onExpandClicked.bind(this);
+  this._onStartEditing = this._onStartEditing.bind(this);
+  this._onNameDone = this._onNameDone.bind(this);
+  this._onValueDone = this._onValueDone.bind(this);
+
+  this._create();
+  this.update();
+}
+
+TextPropertyEditor.prototype = {
+  get editing() {
+    return !!(this.nameSpan.inplaceEditor || this.valueSpan.inplaceEditor);
+  },
+
+  /**
+   * Create the property editor's DOM.
+   */
+  _create: function TextPropertyEditor_create()
+  {
+    this.element = this.doc.createElementNS(HTML_NS, "li");
+    this.element.classList.add("ruleview-property");
+
+    // The enable checkbox will disable or enable the rule.
+    this.enable = createChild(this.element, "input", {
+      class: "ruleview-enableproperty",
+      type: "checkbox",
+      tabindex: "-1"
+    });
+    this.enable.addEventListener("click", this._onEnableClicked, true);
+
+    // Click to expand the computed properties of the text property.
+    this.expander = createChild(this.element, "span", {
+      class: "ruleview-expander"
+    });
+    this.expander.addEventListener("click", this._onExpandClicked, true);
+
+    // Property name, editable when focused.  Property name
+    // is committed when the editor is unfocused.
+    this.nameSpan = createChild(this.element, "span", {
+      class: "ruleview-propertyname",
+      tabindex: "0",
+    });
+    editableField({
+      start: this._onStartEditing,
+      element: this.nameSpan,
+      done: this._onNameDone,
+      advanceChars: ':'
+    });
+
+    appendText(this.element, ": ");
+
+    // Property value, editable when focused.  Changes to the
+    // property value are applied as they are typed, and reverted
+    // if the user presses escape.
+    this.valueSpan = createChild(this.element, "span", {
+      class: "ruleview-propertyvalue",
+      tabindex: "0",
+    });
+
+    editableField({
+      start: this._onStartEditing,
+      element: this.valueSpan,
+      done: this._onValueDone,
+      advanceChars: ';'
+    });
+
+    // Save the initial value as the last committed value,
+    // for restoring after pressing escape.
+    this.committed = { name: this.prop.name,
+                       value: this.prop.value,
+                       priority: this.prop.priority };
+
+    appendText(this.element, ";");
+
+    // Holds the viewers for the computed properties.
+    // will be populated in |_updateComputed|.
+    this.computed = createChild(this.element, "ul", {
+      class: "ruleview-computedlist",
+    });
+  },
+
+  /**
+   * Populate the span based on changes to the TextProperty.
+   */
+  update: function TextPropertyEditor_update()
+  {
+    if (this.prop.enabled) {
+      this.enable.style.removeProperty("visibility");
+      this.enable.setAttribute("checked", "");
+    } else {
+      this.enable.style.visibility = "visible";
+      this.enable.removeAttribute("checked");
+    }
+
+    if (this.prop.overridden && !this.editing) {
+      this.element.classList.add("ruleview-overridden");
+    } else {
+      this.element.classList.remove("ruleview-overridden");
+    }
+
+    this.nameSpan.textContent = this.prop.name;
+
+    // Combine the property's value and priority into one string for
+    // the value.
+    let val = this.prop.value;
+    if (this.prop.priority) {
+      val += " !" + this.prop.priority;
+    }
+    this.valueSpan.textContent = val;
+
+    // Populate the computed styles.
+    this._updateComputed();
+  },
+
+  _onStartEditing: function TextPropertyEditor_onStartEditing()
+  {
+    this.element.classList.remove("ruleview-overridden");
+  },
+
+  /**
+   * Populate the list of computed styles.
+   */
+  _updateComputed: function TextPropertyEditor_updateComputed()
+  {
+    // Clear out existing viewers.
+    while (this.computed.hasChildNodes()) {
+      this.computed.removeChild(this.computed.lastChild);
+    }
+
+    let showExpander = false;
+    for each (let computed in this.prop.computed) {
+      // Don't bother to duplicate information already
+      // shown in the text property.
+      if (computed.name === this.prop.name) {
+        continue;
+      }
+
+      showExpander = true;
+
+      let li = createChild(this.computed, "li", {
+        class: "ruleview-computed"
+      });
+
+      if (computed.overridden) {
+        li.classList.add("ruleview-overridden");
+      }
+
+      createChild(li, "span", {
+        class: "ruleview-propertyname",
+        textContent: computed.name
+      });
+      appendText(li, ": ");
+      createChild(li, "span", {
+        class: "ruleview-propertyvalue",
+        textContent: computed.value
+      });
+      appendText(li, ";");
+    }
+
+    // Show or hide the expander as needed.
+    if (showExpander) {
+      this.expander.style.visibility = "visible";
+    } else {
+      this.expander.style.visibility = "hidden";
+    }
+  },
+
+  /**
+   * Handles clicks on the disabled property.
+   */
+  _onEnableClicked: function TextPropertyEditor_onEnableClicked()
+  {
+    this.prop.setEnabled(this.enable.checked);
+  },
+
+  /**
+   * Handles clicks on the computed property expander.
+   */
+  _onExpandClicked: function TextPropertyEditor_onExpandClicked()
+  {
+    this.expander.classList.toggle("styleinspector-open");
+    this.computed.classList.toggle("styleinspector-open");
+  },
+
+  /**
+   * Called when the property name's inplace editor is closed.
+   * Ignores the change if the user pressed escape, otherwise
+   * commits it.
+   *
+   * @param {string} aValue
+   *        The value contained in the editor.
+   * @param {boolean} aCommit
+   *        True if the change should be applied.
+   */
+  _onNameDone: function TextPropertyEditor_onNameDone(aValue, aCommit)
+  {
+    if (!aCommit) {
+      return;
+    }
+    if (!aValue) {
+      this.prop.remove();
+      this.element.parentNode.removeChild(this.element);
+      return;
+    }
+    this.prop.setName(aValue);
+  },
+
+  /**
+   * Pull priority (!important) out of the value provided by a
+   * value editor.
+   *
+   * @param {string} aValue
+   *        The value from the text editor.
+   * @return an object with 'value' and 'priority' properties.
+   */
+  _parseValue: function TextPropertyEditor_parseValue(aValue)
+  {
+    let [value, priority] = aValue.split("!", 2);
+    return {
+      value: value.trim(),
+      priority: (priority ? priority.trim() : "")
+    };
+  },
+
+  /**
+   * Called when a value editor closes.  If the user pressed escape,
+   * revert to the value this property had before editing.
+   *
+   * @param {string} aValue
+   *        The value contained in the editor.
+   * @param {boolean} aCommit
+   *        True if the change should be applied.
+   */
+   _onValueDone: function PropertyEditor_onValueDone(aValue, aCommit)
+  {
+    if (aCommit) {
+      let val = this._parseValue(aValue);
+      this.prop.setValue(val.value, val.priority);
+      this.committed.value = this.prop.value;
+      this.committed.priority = this.prop.priority;
+    } else {
+      this.prop.setValue(this.committed.value, this.committed.priority);
+    }
+  },
+};
+
+/**
+ * Mark a span editable.  |editableField| will listen for the span to
+ * be focused and create an InlineEditor to handle text input.
+ * Changes will be committed when the InlineEditor's input is blurred
+ * or dropped when the user presses escape.
+ *
+ * @param {object} aOptions
+ *    Options for the editable field, including:
+ *    {Element} element:
+ *      (required) The span to be edited on focus.
+ *    {function} start:
+ *       Will be called when the inplace editor is initialized.
+ *    {function} change:
+ *       Will be called when the text input changes.  Will be called
+ *       with the current value of the text input.
+ *    {function} done:
+ *       Called when input is committed or blurred.  Called with
+ *       current value and a boolean telling the caller whether to
+ *       commit the change.
+ *    {string} advanceChars:
+ *       If any characters in advanceChars are typed, focus will advance
+ *       to the next element.
+ */
+function editableField(aOptions)
+{
+  aOptions.element.addEventListener("focus", function() {
+    new InplaceEditor(aOptions);
+  }, false);
+}
+var _editableField = editableField;
+
+function InplaceEditor(aOptions)
+{
+  this.elt = aOptions.element;
+  this.elt.inplaceEditor = this;
+
+  this.change = aOptions.change;
+  this.done = aOptions.done;
+  this.initial = aOptions.initial ? aOptions.initial : this.elt.textContent;
+  this.doc = this.elt.ownerDocument;
+
+  this._onBlur = this._onBlur.bind(this);
+  this._onKeyPress = this._onKeyPress.bind(this);
+  this._onInput = this._onInput.bind(this);
+
+  this._createInput();
+  this._autosize();
+
+  // Pull out character codes for advanceChars, listing the
+  // characters that should trigger a blur.
+  this._advanceCharCodes = {};
+  let advanceChars = aOptions.advanceChars || '';
+  for (let i = 0; i < advanceChars.length; i++) {
+    this._advanceCharCodes[advanceChars.charCodeAt(i)] = true;
+  }
+
+  // Hide the provided element and add our editor.
+  this.originalDisplay = this.elt.style.display;
+  this.elt.style.display = "none";
+  this.elt.parentNode.insertBefore(this.input, this.elt);
+
+  this.input.select();
+  this.input.focus();
+
+  this.input.addEventListener("blur", this._onBlur, false);
+  this.input.addEventListener("keypress", this._onKeyPress, false);
+  this.input.addEventListener("input", this._onInput, false);
+
+  if (aOptions.start) {
+    aOptions.start();
+  }
+}
+
+InplaceEditor.prototype = {
+  _createInput: function InplaceEditor_createEditor()
+  {
+    this.input = this.doc.createElementNS(HTML_NS, "input");
+    this.input.inplaceEditor = this;
+    this.input.classList.add("styleinspector-propertyeditor");
+    this.input.value = this.initial;
+
+    copyTextStyles(this.elt, this.input);
+  },
+
+  /**
+   * Get rid of the editor.
+   */
+  _clear: function InplaceEditor_clear()
+  {
+    this.input.removeEventListener("blur", this._onBlur, false);
+    this.input.removeEventListener("keypress", this._onKeyPress, false);
+    this.input.removeEventListener("oninput", this._onInput, false);
+    this._stopAutosize();
+
+    this.elt.parentNode.removeChild(this.input);
+    this.elt.style.display = this.originalDisplay;
+    this.input = null;
+
+    delete this.elt.inplaceEditor;
+    delete this.elt;
+  },
+
+  /**
+   * Keeps the editor close to the size of its input string.  This is pretty
+   * crappy, suggestions for improvement welcome.
+   */
+  _autosize: function InplaceEditor_autosize()
+  {
+    // Create a hidden, absolutely-positioned span to measure the text
+    // in the input.  Boo.
+
+    // We can't just measure the original element because a) we don't
+    // change the underlying element's text ourselves (we leave that
+    // up to the client), and b) without tweaking the style of the
+    // original element, it might wrap differently or something.
+    this._measurement = this.doc.createElementNS(HTML_NS, "span");
+    this.elt.parentNode.appendChild(this._measurement);
+    let style = this._measurement.style;
+    style.visibility = "hidden";
+    style.position = "absolute";
+    style.top = "0";
+    style.left = "0";
+    copyTextStyles(this.input, this._measurement);
+    this._updateSize();
+  },
+
+  /**
+   * Clean up the mess created by _autosize().
+   */
+  _stopAutosize: function InplaceEditor_stopAutosize()
+  {
+    if (!this._measurement) {
+      return;
+    }
+    this._measurement.parentNode.removeChild(this._measurement);
+    delete this._measurement;
+  },
+
+  /**
+   * Size the editor to fit its current contents.
+   */
+  _updateSize: function InplaceEditor_updateSize()
+  {
+    // Replace spaces with non-breaking spaces.  Otherwise setting
+    // the span's textContent will collapse spaces and the measurement
+    // will be wrong.
+    this._measurement.textContent = this.input.value.replace(' ', '\u00a0', 'g');
+
+    // We add a bit of padding to the end.  Should be enough to fit
+    // any letter that could be typed, otherwise we'll scroll before
+    // we get a chance to resize.  Yuck.
+    let width = this._measurement.offsetWidth + 10;
+
+    this.input.style.width = width + "px";
+  },
+
+  /**
+   * Handle loss of focus by calling the client's done handler and
+   * clearing out.
+   */
+  _onBlur: function InplaceEditor_onBlur(aEvent)
+  {
+    if (this.done) {
+      this.done(this.cancelled ? this.initial : this.input.value.trim(),
+                !this.cancelled);
+    }
+    this._clear();
+  },
+
+  _onKeyPress: function InplaceEditor_onKeyPress(aEvent)
+  {
+    let prevent = false;
+    if (aEvent.charCode in this._advanceCharCodes
+       || aEvent.keyCode === Ci.nsIDOMKeyEvent.DOM_VK_RETURN) {
+      // Focus the next element, triggering a blur which
+      // will eventually shut us down (making return roughly equal
+      // tab).
+      prevent = true;
+      moveFocus(this.input.ownerDocument.defaultView, FOCUS_FORWARD);
+    } else if (aEvent.keyCode === Ci.nsIDOMKeyEvent.DOM_VK_ESCAPE) {
+      // Cancel and blur ourselves.  |_onBlur| will call the user's
+      // done handler for us.
+      prevent = true;
+      this.cancelled = true;
+      this.input.blur();
+    } else if (aEvent.keyCode === Ci.nsIDOMKeyEvent.DOM_VK_SPACE) {
+      // No need for leading spaces here.  This is particularly
+      // noticable when adding a property: it's very natural to type
+      // <name>: (which advances to the next property) then spacebar.
+      prevent = !this.input.value;
+    }
+
+    if (prevent) {
+      aEvent.preventDefault();
+    }
+  },
+
+  /**
+   * Handle changes the input text.
+   */
+  _onInput: function InplaceEditor_onInput(aEvent)
+  {
+    // Update size if we're autosizing.
+    if (this._measurement) {
+      this._updateSize();
+    }
+
+    // Call the user's change handler if available.
+    if (this.change) {
+      this.change(this.input.value.trim());
+    }
+  }
+};
+
+/**
+ * Helper functions
+ */
+
+/**
+ * Create a child element with a set of attributes.
+ *
+ * @param {Element} aParent
+ *        The parent node.
+ * @param {string} aTag
+ *        The tag name.
+ * @param {object} aAttributes
+ *        A set of attributes to set on the node.
+ */
+function createChild(aParent, aTag, aAttributes)
+{
+  let elt = aParent.ownerDocument.createElementNS(HTML_NS, aTag);
+  for (let attr in aAttributes) {
+    if (aAttributes.hasOwnProperty(attr)) {
+      if (attr === "textContent") {
+        elt.textContent = aAttributes[attr];
+      } else {
+        elt.setAttribute(attr, aAttributes[attr]);
+      }
+    }
+  }
+  aParent.appendChild(elt);
+  return elt;
+}
+
+/**
+ * Append a text node to an element.
+ */
+function appendText(aParent, aText)
+{
+  aParent.appendChild(aParent.ownerDocument.createTextNode(aText));
+}
+
+/**
+ * Copy text-related styles from one element to another.
+ */
+function copyTextStyles(aFrom, aTo)
+{
+  let win = aFrom.ownerDocument.defaultView;
+  let style = win.getComputedStyle(aFrom);
+  aTo.style.fontFamily = style.getPropertyCSSValue("font-family").cssText;
+  aTo.style.fontSize = style.getPropertyCSSValue("font-size").cssText;
+  aTo.style.fontWeight = style.getPropertyCSSValue("font-weight").cssText;
+  aTo.style.fontStyle = style.getPropertyCSSValue("font-style").cssText;
+}
+
+/**
+ * Trigger a focus change similar to pressing tab/shift-tab.
+ */
+function moveFocus(aWin, aDirection)
+{
+  let fm = Cc["@mozilla.org/focus-manager;1"].getService(Ci.nsIFocusManager);
+  fm.moveFocus(aWin, null, aDirection, 0);
+}

new file mode 100644
--- /dev/null
+++ b/browser/devtools/styleinspector/cssruleview.xhtml
@@ -0,0 +1,53 @@
+<!DOCTYPE html [
+  <!ENTITY % htmlDTD PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
+  %htmlDTD;
+  <!ENTITY % inspectorDTD SYSTEM "chrome://browser/locale/styleinspector.dtd">
+  %inspectorDTD;
+]>
+<!-- ***** BEGIN LICENSE BLOCK *****
+   - Version: MPL 1.1/GPL 2.0/LGPL 2.1
+   -
+   - The contents of this file are subject to the Mozilla Public License Version
+   - 1.1 (the "License"); you may not use this file except in compliance with
+   - the License. You may obtain a copy of the License at
+   - http://www.mozilla.org/MPL/
+   -
+   - Software distributed under the License is distributed on an "AS IS" basis,
+   - WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+   - for the specific language governing rights and limitations under the
+   - License.
+   -
+   - The Original Code is the Mozilla Inspector Module.
+   -
+   - The Initial Developer of the Original Code is The Mozilla Foundation.
+   - Portions created by the Initial Developer are Copyright (C) 2011
+   - the Initial Developer. All Rights Reserved.
+   -
+   - Contributor(s):
+   -   Dave Camp (dcamp@mozilla.com) (original author)
+   -
+   - Alternatively, the contents of this file may be used under the terms of
+   - either the GNU General Public License Version 2 or later (the "GPL"), or
+   - the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+   - in which case the provisions of the GPL or the LGPL are applicable instead
+   - of those above. If you wish to allow use of your version of this file only
+   - under the terms of either the GPL or the LGPL, and not to allow others to
+   - use your version of this file under the terms of the MPL, indicate your
+   - decision by deleting the provisions above and replace them with the notice
+   - and other provisions required by the LGPL or the GPL. If you do not delete
+   - the provisions above, a recipient may use your version of this file under
+   - the terms of any one of the MPL, the GPL or the LGPL.
+   -
+   - ***** END LICENSE BLOCK ***** -->
+<html xmlns="http://www.w3.org/1999/xhtml"
+  xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+<head>
+  <meta http-equiv="Content-Type"
+    content="application/xhtml+xml; charset=UTF-8" />
+  <link rel="stylesheet" type="text/css"
+    href="chrome://browser/content/devtools/styleinspector.css" />
+  <link rel="stylesheet" type="text/css"
+    href="chrome://browser/skin/devtools/csshtmltree.css" />
+</head>
+<body role="application" id="ruleview-body"></body>
+</html>

new file mode 100644
--- /dev/null
+++ b/browser/devtools/styleinspector/styleinspector.css
@@ -0,0 +1,40 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Mozilla Inspector Module.
+ *
+ * The Initial Developer of the Original Code is
+ * The Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2011
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Dave Camp <dcamp@mozilla.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+.ruleview-computedlist:not(.styleinspector-open) {
+  display: none;
+}

--- a/browser/devtools/styleinspector/test/browser/Makefile.in
+++ b/browser/devtools/styleinspector/test/browser/Makefile.in
@@ -47,16 +47,20 @@ include $(topsrcdir)/config/rules.mk
 
 _BROWSER_TEST_FILES = \
   browser_styleinspector.js \
   browser_styleinspector_webconsole.js \
   browser_bug683672.js \
   browser_styleinspector_bug_672746_default_styles.js \
   browser_styleinspector_bug_672744_search_filter.js \
   browser_bug_692400_element_style.js \
+  browser_ruleview_editor.js \
+  browser_ruleview_manipulation.js \
+  browser_ruleview_override.js \
+  browser_ruleview_ui.js \
   head.js \
   $(NULL)
 
 _BROWSER_TEST_PAGES = \
   browser_styleinspector_webconsole.htm \
   browser_bug683672.html \
   $(NULL)
 

new file mode 100644
--- /dev/null
+++ b/browser/devtools/styleinspector/test/browser/browser_ruleview_editor.js
@@ -0,0 +1,121 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+Cu.import("resource:///modules/devtools/CssRuleView.jsm");
+
+let doc = content.document;
+
+function expectDone(aValue, aCommit, aNext)
+{
+  return function(aDoneValue, aDoneCommit) {
+    dump("aDoneValue: " + aDoneValue + " commit: " + aDoneCommit + "\n");
+
+    is(aDoneValue, aValue, "Should get expected value");
+    is(aDoneCommit, aDoneCommit, "Should get expected commit value");
+    aNext();
+  }
+}
+
+function clearBody()
+{
+  doc.body.innerHTML = "";
+}
+
+function createSpan()
+{
+  let span = doc.createElement("span");
+  span.setAttribute("tabindex", "0");
+  span.textContent = "Edit Me!";
+  doc.body.appendChild(span);
+  return span;
+}
+
+function testReturnCommit()
+{
+  clearBody();
+  let span = createSpan();
+  _editableField({
+    element: span,
+    initial: "explicit initial",
+    start: function() {
+      is(span.inplaceEditor.input.value, "explicit initial", "Explicit initial value should be used.");
+      span.inplaceEditor.input.value = "Test Value";
+      EventUtils.sendKey("return", span.inplaceEditor.input);
+    },
+    done: expectDone("Test Value", true, testBlurCommit)
+  });
+  span.focus();
+}
+
+function testBlurCommit()
+{
+  clearBody();
+  let span = createSpan();
+  _editableField({
+    element: span,
+    start: function() {
+      is(span.inplaceEditor.input.value, "Edit Me!", "textContent of the span used.");
+      span.inplaceEditor.input.value = "Test Value";
+      span.inplaceEditor.input.blur();
+    },
+    done: expectDone("Test Value", true, testAdvanceCharCommit)
+  });
+  span.focus();
+}
+
+function testAdvanceCharCommit()
+{
+  clearBody();
+  let span = createSpan();
+  _editableField({
+    element: span,
+    advanceChars: ":",
+    start: function() {
+      let input = span.inplaceEditor.input;
+      for each (let ch in "Test:") {
+        EventUtils.sendChar(ch, input);
+      }
+    },
+    done: expectDone("Test", true, testEscapeCancel)
+  });
+  span.focus();
+}
+
+function testEscapeCancel()
+{
+  clearBody();
+  let span = createSpan();
+  _editableField({
+    element: span,
+    initial: "initial text",
+    start: function() {
+      span.inplaceEditor.input.value = "Test Value";
+      EventUtils.sendKey("escape", span.inplaceEditor.input);
+    },
+    done: expectDone("initial text", false, finishTest)
+  });
+  span.focus();
+}
+
+
+function finishTest()
+{
+  doc = null;
+  gBrowser.removeCurrentTab();
+  finish();
+}
+
+
+function test()
+{
+  waitForExplicitFinish();
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function(evt) {
+    gBrowser.selectedBrowser.removeEventListener(evt.type, arguments.callee, true);
+    doc = content.document;
+    waitForFocus(testReturnCommit, content);
+  }, true);
+
+  content.location = "data:text/html,inline editor tests";
+}
\ No newline at end of file

new file mode 100644
--- /dev/null
+++ b/browser/devtools/styleinspector/test/browser/browser_ruleview_manipulation.js
@@ -0,0 +1,70 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+Cu.import("resource:///modules/devtools/CssRuleView.jsm");
+
+let doc;
+
+function simpleOverride()
+{
+  doc.body.innerHTML = '<div id="testid">Styled Node</div>';
+  let element = doc.getElementById("testid");
+  let elementStyle = new _ElementStyle(element);
+
+  let elementRule = elementStyle.rules[0];
+  let firstProp = elementRule.createProperty("background-color", "green", "");
+  let secondProp = elementRule.createProperty("background-color", "blue", "");
+  is(elementRule.textProps[0], firstProp, "Rules should be in addition order.");
+  is(elementRule.textProps[1], secondProp, "Rules should be in addition order.");
+
+  is(element.style.getPropertyValue("background-color"), "blue", "Second property should have been used.");
+
+  secondProp.remove();
+  is(element.style.getPropertyValue("background-color"), "green", "After deleting second property, first should be used.");
+
+  secondProp = elementRule.createProperty("background-color", "blue", "");
+  is(element.style.getPropertyValue("background-color"), "blue", "New property should be used.");
+
+  is(elementRule.textProps[0], firstProp, "Rules shouldn't have switched places.");
+  is(elementRule.textProps[1], secondProp, "Rules shouldn't have switched places.");
+
+  secondProp.setEnabled(false);
+  is(element.style.getPropertyValue("background-color"), "green", "After disabling second property, first value should be used");
+
+  firstProp.setEnabled(false);
+  is(element.style.getPropertyValue("background-color"), "", "After disabling both properties, value should be empty.");
+
+  secondProp.setEnabled(true);
+  is(element.style.getPropertyValue("background-color"), "blue", "Value should be set correctly after re-enabling");
+
+  firstProp.setEnabled(true);
+  is(element.style.getPropertyValue("background-color"), "blue", "Re-enabling an earlier property shouldn't make it override a later property.");
+  is(elementRule.textProps[0], firstProp, "Rules shouldn't have switched places.");
+  is(elementRule.textProps[1], secondProp, "Rules shouldn't have switched places.");
+
+  firstProp.setValue("purple", "");
+  is(element.style.getPropertyValue("background-color"), "blue", "Modifying an earlier property shouldn't override a later property.");
+
+  finishTest();
+}
+
+function finishTest()
+{
+  doc = null;
+  gBrowser.removeCurrentTab();
+  finish();
+}
+
+function test()
+{
+  waitForExplicitFinish();
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function(evt) {
+    gBrowser.selectedBrowser.removeEventListener(evt.type, arguments.callee, true);
+    doc = content.document;
+    waitForFocus(simpleOverride, content);
+  }, true);
+
+  content.location = "data:text/html,basic style inspector tests";
+}

new file mode 100644
--- /dev/null
+++ b/browser/devtools/styleinspector/test/browser/browser_ruleview_override.js
@@ -0,0 +1,134 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+Cu.import("resource:///modules/devtools/CssRuleView.jsm");
+
+let doc;
+
+function simpleOverride()
+{
+  let style = '' +
+    '#testid {' +
+    '  background-color: blue;' +
+    '} ' +
+    '.testclass {' +
+    '  background-color: green;' +
+    '}';
+
+  let styleNode = addStyle(doc, style);
+  doc.body.innerHTML = '<div id="testid" class="testclass">Styled Node</div>';
+
+  let elementStyle = new _ElementStyle(doc.getElementById("testid"));
+
+  let idRule = elementStyle.rules[1];
+  let idProp = idRule.textProps[0];
+  is(idProp.name, "background-color", "First ID prop should be background-color");
+  ok(!idProp.overridden, "ID prop should not be overridden.");
+
+  let classRule = elementStyle.rules[2];
+  let classProp = classRule.textProps[0];
+  is(classProp.name, "background-color", "First class prop should be background-color");
+  ok(classProp.overridden, "Class property should be overridden.");
+
+  // Override background-color by changing the element style.
+  let elementRule = elementStyle.rules[0];
+  elementRule.createProperty("background-color", "purple", "");
+  let elementProp = elementRule.textProps[0];
+  is(classProp.name, "background-color", "First element prop should now be background-color");
+
+  ok(!elementProp.overridden, "Element style property should not be overridden");
+  ok(idProp.overridden, "ID property should be overridden");
+  ok(classProp.overridden, "Class property should be overridden");
+
+  styleNode.parentNode.removeChild(styleNode);
+
+  partialOverride();
+}
+
+function partialOverride()
+{
+  let style = '' +
+    // Margin shorthand property...
+    '.testclass {' +
+    '  margin: 2px;' +
+    '}' +
+    // ... will be partially overridden.
+    '#testid {' +
+    '  margin-left: 1px;' +
+    '}';
+
+  let styleNode = addStyle(doc, style);
+  doc.body.innerHTML = '<div id="testid" class="testclass">Styled Node</div>';
+
+  let elementStyle = new _ElementStyle(doc.getElementById("testid"));
+
+  let classRule = elementStyle.rules[2];
+  let classProp = classRule.textProps[0];
+  ok(!classProp.overridden, "Class prop shouldn't be overridden, some props are still being used.");
+  for each (let computed in classProp.computed) {
+    if (computed.name.indexOf("margin-left") == 0) {
+      ok(computed.overridden, "margin-left props should be overridden.");
+    } else {
+      ok(!computed.overridden, "Non-margin-left props should not be overridden.");
+    }
+  }
+
+  styleNode.parentNode.removeChild(styleNode);
+
+  importantOverride();
+}
+
+function importantOverride()
+{
+  let style = '' +
+    // Margin shorthand property...
+    '.testclass {' +
+    '  background-color: green !important;' +
+    '}' +
+    // ... will be partially overridden.
+    '#testid {' +
+    '  background-color: blue;' +
+    '}';
+  let styleNode = addStyle(doc, style);
+  doc.body.innerHTML = '<div id="testid" class="testclass">Styled Node</div>';
+
+  let elementStyle = new _ElementStyle(doc.getElementById("testid"));
+
+  let idRule = elementStyle.rules[1];
+  let idProp = idRule.textProps[0];
+  ok(idProp.overridden, "Not-important rule should be overridden.");
+
+  let classRule = elementStyle.rules[2];
+  let classProp = classRule.textProps[0];
+  ok(!classProp.overridden, "Important rule should not be overridden.");
+
+  styleNode.parentNode.removeChild(styleNode);
+
+  let elementRule = elementStyle.rules[0];
+  let elementProp = elementRule.createProperty("background-color", "purple", "important");
+  ok(classProp.overridden, "New important prop should override class property.");
+  ok(!elementProp.overridden, "New important prop should not be overriden.");
+
+  finishTest();
+}
+
+function finishTest()
+{
+  doc = null;
+  gBrowser.removeCurrentTab();
+  finish();
+}
+
+function test()
+{
+  waitForExplicitFinish();
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function(evt) {
+    gBrowser.selectedBrowser.removeEventListener(evt.type, arguments.callee, true);
+    doc = content.document;
+    waitForFocus(simpleOverride, content);
+  }, true);
+
+  content.location = "data:text/html,basic style inspector tests";
+}

new file mode 100644
--- /dev/null
+++ b/browser/devtools/styleinspector/test/browser/browser_ruleview_ui.js
@@ -0,0 +1,180 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+Cu.import("resource:///modules/devtools/CssRuleView.jsm");
+
+let doc;
+let ruleDialog;
+let ruleView;
+
+function waitForEditorFocus(aParent, aCallback)
+{
+  aParent.addEventListener("focus", function onFocus(evt) {
+    if (evt.target.inplaceEditor) {
+      aParent.removeEventListener("focus", onFocus, true);
+      let editor = evt.target.inplaceEditor;
+      executeSoon(function() {
+        aCallback(editor);
+      });
+    }
+  }, true);
+}
+
+function waitForEditorBlur(aEditor, aCallback)
+{
+  let input = aEditor.input;
+  input.addEventListener("blur", function onBlur() {
+    input.removeEventListener("blur", onBlur, false);
+    executeSoon(function() {
+      aCallback();
+    });
+  }, false);
+}
+
+function startTest()
+{
+  let style = '' +
+    '#testid {' +
+    '  background-color: blue;' +
+    '} ' +
+    '.testclass {' +
+    '  background-color: green;' +
+    '}';
+
+  let styleNode = addStyle(doc, style);
+  doc.body.innerHTML = '<div id="testid" class="testclass">Styled Node</div>';
+  let testElement = doc.getElementById("testid");
+
+  ruleDialog = openDialog("chrome://browser/content/devtools/cssruleview.xhtml",
+                          "cssruleviewtest",
+                          "width=200,height=350");
+  ruleDialog.addEventListener("load", function onLoad(evt) {
+    ruleDialog.removeEventListener("load", onLoad);
+    let doc = ruleDialog.document;
+    let body = doc.getElementById("ruleview-body");
+    ruleView = new CssRuleView(doc);
+    body.appendChild(ruleView.element);
+    ruleView.highlight(testElement);
+    waitForFocus(testCancelNew, ruleDialog);
+  }, true);
+}
+
+function testCancelNew()
+{
+  // Start at the beginning: start to add a rule to the element's style
+  // declaration, but leave it empty.
+
+  let elementRuleEditor = ruleView.element.children[0]._ruleEditor;
+  waitForEditorFocus(elementRuleEditor.element, function onNewElement(aEditor) {
+    is(elementRuleEditor.newPropSpan.inplaceEditor, aEditor, "Next focused editor should be the new property editor.");
+    let input = aEditor.input;
+    waitForEditorBlur(aEditor, function () {
+      is(elementRuleEditor.rule.textProps.length,  0, "Should have canceled creating a new text property.");
+      ok(!elementRuleEditor.propertyList.hasChildNodes(), "Should not have any properties.");
+      testCreateNew();
+    });
+    aEditor.input.blur();
+  });
+
+  EventUtils.synthesizeMouse(elementRuleEditor.closeBrace, 1, 1,
+                             { },
+                             ruleDialog);
+}
+
+function testCreateNew()
+{
+  // Create a new property.
+  let elementRuleEditor = ruleView.element.children[0]._ruleEditor;
+  waitForEditorFocus(elementRuleEditor.element, function onNewElement(aEditor) {
+    is(elementRuleEditor.newPropSpan.inplaceEditor, aEditor, "Next focused editor should be the new property editor.");
+    let input = aEditor.input;
+    input.value = "background-color";
+
+    waitForEditorFocus(elementRuleEditor.element, function onNewValue(aEditor) {
+      is(elementRuleEditor.rule.textProps.length,  1, "Should have created a new text property.");
+      is(elementRuleEditor.propertyList.children.length, 1, "Should have created a property editor.");
+      let textProp = elementRuleEditor.rule.textProps[0];
+      is(aEditor, textProp.editor.valueSpan.inplaceEditor, "Should be editing the value span now.");
+
+      aEditor.input.value = "purple";
+      waitForEditorBlur(aEditor, function() {
+        is(textProp.value, "purple", "Text prop should have been changed.");
+        testEditProperty();
+      });
+
+      aEditor.input.blur();
+    });
+    EventUtils.sendKey("return", input);
+  });
+
+  EventUtils.synthesizeMouse(elementRuleEditor.closeBrace, 1, 1,
+                             { },
+                             ruleDialog);
+}
+
+function testEditProperty()
+{
+  let idRuleEditor = ruleView.element.children[1]._ruleEditor;
+  let propEditor = idRuleEditor.rule.textProps[0].editor;
+  waitForEditorFocus(propEditor.element, function onNewElement(aEditor) {
+    is(propEditor.nameSpan.inplaceEditor, aEditor, "Next focused editor should be the name editor.");
+    let input = aEditor.input;
+    waitForEditorFocus(propEditor.element, function onNewName(aEditor) {
+      input = aEditor.input;
+      is(propEditor.valueSpan.inplaceEditor, aEditor, "Focus should have moved to the value.");
+
+      waitForEditorBlur(aEditor, function() {
+        is(idRuleEditor.rule.style.getPropertyValue("border-color"), "red",
+           "border-color should have been set.");
+        testDisableProperty();
+      });
+
+      for each (let ch in "red;") {
+        EventUtils.sendChar(ch, input);
+      }
+    });
+    for each (let ch in "border-color:") {
+      EventUtils.sendChar(ch, input);
+    }
+  });
+
+  EventUtils.synthesizeMouse(propEditor.nameSpan, 1, 1,
+                             { },
+                             ruleDialog);
+}
+
+function testDisableProperty()
+{
+  let idRuleEditor = ruleView.element.children[1]._ruleEditor;
+  let propEditor = idRuleEditor.rule.textProps[0].editor;
+
+  propEditor.enable.click();
+  is(idRuleEditor.rule.style.getPropertyValue("border-color"), "", "Border-color should have been unset.");
+  propEditor.enable.click();
+  is(idRuleEditor.rule.style.getPropertyValue("border-color"), "red",
+     "Border-color should have been reset.");
+  finishTest();
+}
+
+function finishTest()
+{
+  ruleDialog.close();
+  ruleDialog = ruleView = null;
+  doc = null;
+  gBrowser.removeCurrentTab();
+  finish();
+}
+
+function test()
+{
+  waitForExplicitFinish();
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function(evt) {
+    gBrowser.selectedBrowser.removeEventListener(evt.type, arguments.callee, true);
+    doc = content.document;
+    waitForFocus(startTest, content);
+  }, true);
+
+  content.location = "data:text/html,basic style inspector tests";
+}

--- a/browser/devtools/styleinspector/test/browser/head.js
+++ b/browser/devtools/styleinspector/test/browser/head.js
@@ -145,16 +145,25 @@ function testLogEntry(aOutputNode, aMatc
  * @param string aString
  *        The string to find.
  */
 function findLogEntry(aString)
 {
   testLogEntry(outputNode, aString, "found " + aString);
 }
 
+function addStyle(aDocument, aString)
+{
+  let node = aDocument.createElement('style');
+  node.setAttribute("type", "text/css");
+  node.textContent = aString;
+  aDocument.getElementsByTagName("head")[0].appendChild(node);
+  return node;
+}
+
 function openConsole()
 {
   HUDService.activateHUDForContext(tab);
 }
 
 function closeConsole()
 {
   HUDService.deactivateHUDForContext(tab);

--- a/browser/devtools/webconsole/HUDService.jsm
+++ b/browser/devtools/webconsole/HUDService.jsm
@@ -80,16 +80,22 @@ XPCOMUtils.defineLazyGetter(this, "gcli"
 });
 
 XPCOMUtils.defineLazyGetter(this, "StyleInspector", function () {
   var obj = {};
   Cu.import("resource:///modules/devtools/StyleInspector.jsm", obj);
   return obj.StyleInspector;
 });
 
+XPCOMUtils.defineLazyGetter(this, "CssRuleView", function() {
+  let tmp = {};
+  Cu.import("resource:///modules/devtools/CssRuleView.jsm", tmp);
+  return tmp.CssRuleView;
+});
+
 XPCOMUtils.defineLazyGetter(this, "NetUtil", function () {
   var obj = {};
   Cu.import("resource://gre/modules/NetUtil.jsm", obj);
   return obj.NetUtil;
 });
 
 XPCOMUtils.defineLazyGetter(this, "PropertyPanel", function () {
   var obj = {};
@@ -4595,16 +4601,63 @@ function JSTermHelper(aJSTerm)
         styleInspector.panel.setAttribute("hudToolId", aJSTerm.hudId);
         styleInspector.open(aNode);
       });
     } else {
       aJSTerm.writeOutput(errstr + "\n", CATEGORY_OUTPUT, SEVERITY_ERROR);
     }
   };
 
+  aJSTerm.sandbox.inspectrules = function JSTH_inspectrules(aNode)
+  {
+    aJSTerm.helperEvaluated = true;
+    let doc = aJSTerm.parentNode.ownerDocument;
+    let win = doc.defaultView;
+    let panel = createElement(doc, "panel", {
+      label: "CSS Rules",
+      titlebar: "normal",
+      noautofocus: "true",
+      noautohide: "true",
+      close: "true",
+      width: 350,
+      height: (win.screen.height / 2)
+    });
+
+    let iframe = createAndAppendElement(panel, "iframe", {
+      src: "chrome://browser/content/devtools/cssruleview.xhtml",
+      flex: "1",
+    });
+
+    panel.addEventListener("load", function onLoad() {
+      panel.removeEventListener("load", onLoad, true);
+      let doc = iframe.contentDocument;
+      let view = new CssRuleView(doc);
+      let body = doc.getElementById("ruleview-body");
+      body.appendChild(view.element);
+      view.highlight(aNode);
+    }, true);
+
+    let parent = doc.getElementById("mainPopupSet");
+    parent.appendChild(panel);
+
+    panel.addEventListener("popuphidden", function onHide() {
+      panel.removeEventListener("popuphidden", onHide);
+      parent.removeChild(panel);
+    });
+
+    let footer = createElement(doc, "hbox", { align: "end" });
+    createAndAppendElement(footer, "spacer", { flex: 1});
+    createAndAppendElement(footer, "resizer", { dir: "bottomend" });
+    panel.appendChild(footer);
+
+    let anchor = win.gBrowser.selectedBrowser;
+    panel.openPopup(anchor, "end_before", 0, 0, false, false);
+
+  }
+
   /**
    * Prints aObject to the output.
    *
    * @param object aObject
    *        Object to print to the output.
    * @returns void
    */
   aJSTerm.sandbox.pprint = function JSTH_pprint(aObject)

--- a/browser/locales/en-US/chrome/browser/browser.dtd
+++ b/browser/locales/en-US/chrome/browser/browser.dtd
@@ -208,19 +208,20 @@ can reach it easily. -->
   -  "Scratchpad" in your locale. You should feel free to find a close
   -  approximation to it or choose a word (or words) that means
   -  "simple discardable text editor". -->
 <!ENTITY scratchpad.label             "Scratchpad">
 <!ENTITY scratchpad.accesskey         "s">
 <!ENTITY scratchpad.keycode           "VK_F4">
 <!ENTITY scratchpad.keytext           "F4">
 
-<!ENTITY inspectPanelTitle.label      "HTML">
-<!ENTITY inspectButton.label          "Inspect">
-<!ENTITY inspectButton.accesskey      "I">
+<!ENTITY inspectPanelTitle.label        "HTML">
+<!ENTITY inspectButton.label            "Inspect">
+<!ENTITY inspectButton.accesskey        "I">
+<!ENTITY inspectCloseButton.tooltiptext "Close Inspector">
 
 <!ENTITY getMoreDevtoolsCmd.label        "Get More Tools">
 <!ENTITY getMoreDevtoolsCmd.accesskey    "M">
 
 <!ENTITY fileMenu.label         "File"> 
 <!ENTITY fileMenu.accesskey       "F">
 <!ENTITY newNavigatorCmd.label        "New Window">
 <!ENTITY newNavigatorCmd.key        "N">

--- a/browser/themes/gnomestripe/browser/browser.css
+++ b/browser/themes/gnomestripe/browser/browser.css
@@ -1946,26 +1946,26 @@ panel[dimmed="true"] {
 }
 
 /* Highlighter */
 
 .highlighter-veil {
   background-color: rgba(0, 0, 0, 0.5);
 }
 
-#highlighter-close-button {
-  list-style-image: url("chrome://browser/skin/KUI-close.png");
-  top: 12px;
-  right: 12px;
-  cursor: pointer;
+#highlighter-closebutton {
+  list-style-image: url("moz-icon://stock/gtk-close?size=menu");
+  margin-top: 0;
+  margin-bottom: 0;
 }
 
-#highlighter-close-button:-moz-locale-dir(rtl)  {
-  right: auto;
-  left: 12px;
+#highlighter-closebutton > .toolbarbutton-icon {
+  /* XXX Buttons have padding in widget/ that we don't want here but can't override with good CSS, so we must
+     use evil CSS to give the impression of smaller content */
+  margin: -4px;
 }
 
 #highlighter-veil-transparentbox {
   box-shadow: 0 0 0 1px rgba(0,0,0,0.5);
   outline: 1px dashed rgba(255,255,255,0.5);
   outline-offset: -1px;
 }
 
@@ -1973,22 +1973,27 @@ panel[dimmed="true"] {
   box-shadow: 0 0 0 1px black;
   outline-color: white;
 }
 
 /* Highlighter toolbar */
 
 #inspector-toolbar {
   -moz-appearance: none;
-  padding: 0 3px 4px;
+  padding: 4px 3px;
   border-top: 1px solid hsla(210, 8%, 5%, .65);
   box-shadow: 0 1px 0 0 hsla(210, 16%, 76%, .2) inset;
   background-image: -moz-linear-gradient(top, hsl(210,11%,36%), hsl(210,11%,18%));
 }
 
+#inspector-toolbar[treepanel-open] {
+  padding-top: 0;
+  -moz-padding-end: 0;
+}
+
 #inspector-inspect-toolbutton,
 #inspector-tools > toolbarbutton {
   -moz-appearance: none;
   min-width: 78px;
   min-height: 22px;
   color: hsl(210,30%,85%);
   text-shadow: 0 -1px 0 hsla(210,8%,5%,.45);
   border: 1px solid hsla(210,8%,5%,.45);
@@ -2024,20 +2029,16 @@ panel[dimmed="true"] {
 
 /* Highlighter - toolbar resizers */
 
 .inspector-resizer {
   -moz-appearance: none;
   cursor: n-resize;
 }
 
-.inspector-resizer[disabled] {
-  visibility: hidden;
-}
-
 #inspector-top-resizer {
   background: none;
   height: 4px;
 }
 
 #inspector-end-resizer {
   width: 12px;
   height: 8px;

--- a/browser/themes/gnomestripe/browser/devtools/csshtmltree.css
+++ b/browser/themes/gnomestripe/browser/devtools/csshtmltree.css
@@ -182,9 +182,94 @@ a.link:visited {
 .userStyles {
   position: relative;
   top: 3px;
 }
 
 .userStyles,
 .userStylesLabel {
   cursor: pointer;
-}
\ No newline at end of file
+}
+
+/**
+ * CSS Rule View
+ */
+
+.ruleview {
+  background-color: #FFF;
+}
+
+.ruleview-rule-source {
+  background-color: -moz-dialog;
+  padding: 2px;
+}
+
+.ruleview-code {
+  padding: 2px;
+}
+
+.ruleview-propertylist {
+  list-style: none;
+  padding: 0;
+  margin: 0;
+}
+
+.ruleview-enableproperty {
+  height: 10px;
+  width: 10px;
+  -moz-margin-start: 2px;
+  -moz-margin-end: 0;
+}
+
+.ruleview-expander {
+  display: inline-block;
+  width: 8px;
+  height: 8px;
+  background: url("chrome://browser/skin/devtools/arrows.png") 24px 0;
+  cursor: pointer;
+  -moz-margin-start: 2px;
+  -moz-margin-end: 5px;
+}
+
+.ruleview-expander[dir="rtl"] {
+  background-position: 16px 0;
+}
+
+.ruleview-expander.styleinspector-open {
+  background-position: 8px 0;
+}
+
+.ruleview-newproperty {
+  /* (enable checkbox width: 12px) + (expander width: 15px) */
+  -moz-margin-start: 27px;
+}
+
+.ruleview-propertyname {
+  display: inline-block;
+  padding: 1px 0;
+  cursor: text;
+  color: #0060C0;
+  text-decoration: inherit;
+}
+
+.ruleview-propertyvalue {
+  cursor: text;
+  text-decoration: inherit;
+}
+
+.ruleview-computedlist {
+  list-style: none;
+  padding: 0;
+}
+
+.ruleview-computed {
+  -moz-margin-start: 4em;
+}
+
+.ruleview-overridden {
+  text-decoration: line-through;
+}
+
+.styleinspector-propertyeditor {
+  border: 1px solid #CCC;
+  padding: 0;
+  -moz-box-shadow: 2px 2px 2px #CCC;
+}

--- a/browser/themes/pinstripe/browser/browser.css
+++ b/browser/themes/pinstripe/browser/browser.css
@@ -2517,26 +2517,34 @@ panel[dimmed="true"] {
 
 
 /* Highlighter */
 
 .highlighter-veil {
   background-color: rgba(0, 0, 0, 0.5);
 }
 
-#highlighter-close-button {
-  list-style-image: url("chrome://browser/skin/KUI-close.png");
-  top: 12px;
-  right: 12px;
-  cursor: pointer;
-}
-
-#highlighter-close-button:-moz-locale-dir(rtl)  {
-  right: auto;
-  left: 12px;
+#highlighter-closebutton {
+  list-style-image: url("chrome://browser/skin/devtools/toolbarbutton-close.png");
+  -moz-image-region: rect(0, 16px, 16px, 0);
+  min-width: 16px;
+  width: 16px;
+  margin: 0 4px;
+}
+
+#highlighter-closebutton > .toolbarbutton-text {
+  display: none;
+}
+
+#highlighter-closebutton:hover {
+  -moz-image-region: rect(0, 32px, 16px, 16px);
+}
+
+#highlighter-closebutton:active {
+  -moz-image-region: rect(0, 48px, 16px, 32px);
 }
 
 #highlighter-veil-transparentbox {
   box-shadow: 0 0 0 1px rgba(0,0,0,0.5);
   outline: 1px dashed rgba(255,255,255,0.5);
   outline-offset: -1px;
 }
 
@@ -2544,20 +2552,24 @@ panel[dimmed="true"] {
   box-shadow: 0 0 0 1px black;
   outline-color: white;
 }
 
 /* Highlighter toolbar */
 
 #inspector-toolbar {
   -moz-appearance: none;
-  padding: 0 3px 4px;
   border-top: 1px solid hsla(210, 8%, 5%, .65);
   box-shadow: 0 1px 0 0 hsla(210, 16%, 76%, .2) inset;
   background-image: -moz-linear-gradient(top, hsl(210,11%,36%), hsl(210,11%,18%));
+  padding: 4px 16px 4px 0; /* use -moz-padding-end: 16px when/if bug 631729 gets fixed */
+}
+
+#inspector-toolbar[treepanel-open] {
+  padding: 0 0 4px;
 }
 
 #inspector-inspect-toolbutton,
 #inspector-tools > toolbarbutton {
   -moz-appearance: none;
   min-width: 78px;
   min-height: 22px;
   color: hsl(210,30%,85%);
@@ -2595,20 +2607,16 @@ panel[dimmed="true"] {
 
 /* Highlighter - toolbar resizers */
 
 .inspector-resizer {
   -moz-appearance: none;
   cursor: n-resize;
 }
 
-.inspector-resizer[disabled] {
-  visibility: hidden;
-}
-
 #inspector-top-resizer {
   background: none;
   height: 4px;
 }
 
 #inspector-end-resizer {
   width: 12px;
   height: 8px;

--- a/browser/themes/pinstripe/browser/devtools/csshtmltree.css
+++ b/browser/themes/pinstripe/browser/devtools/csshtmltree.css
@@ -182,9 +182,94 @@ a.link:visited {
 .userStyles {
   position: relative;
   top: 3px;
 }
 
 .userStyles,
 .userStylesLabel {
   cursor: pointer;
-}
\ No newline at end of file
+}
+
+/**
+ * CSS Rule View
+ */
+
+.ruleview {
+  background-color: #FFF;
+}
+
+.ruleview-rule-source {
+  background-color: -moz-dialog;
+  padding: 2px;
+}
+
+.ruleview-code {
+  padding: 2px;
+}
+
+.ruleview-propertylist {
+  list-style: none;
+  padding: 0;
+  margin: 0;
+}
+
+.ruleview-enableproperty {
+  height: 10px;
+  width: 10px;
+  -moz-margin-start: 2px;
+  -moz-margin-end: 0;
+}
+
+.ruleview-expander {
+  display: inline-block;
+  width: 8px;
+  height: 8px;
+  background: url("chrome://browser/skin/devtools/arrows.png") 24px 0;
+  cursor: pointer;
+  -moz-margin-start: 2px;
+  -moz-margin-end: 5px;
+}
+
+.ruleview-expander[dir="rtl"] {
+  background-position: 16px 0;
+}
+
+.ruleview-expander.styleinspector-open {
+  background-position: 8px 0;
+}
+
+.ruleview-newproperty {
+  /* (enable checkbox width: 12px) + (expander width: 15px) */
+  -moz-margin-start: 27px;
+}
+
+.ruleview-propertyname {
+  display: inline-block;
+  padding: 1px 0;
+  cursor: text;
+  color: #0060C0;
+  text-decoration: inherit;
+}
+
+.ruleview-propertyvalue {
+  cursor: text;
+  text-decoration: inherit;
+}
+
+.ruleview-computedlist {
+  list-style: none;
+  padding: 0;
+}
+
+.ruleview-computed {
+  -moz-margin-start: 4em;
+}
+
+.ruleview-overridden {
+  text-decoration: line-through;
+}
+
+.styleinspector-propertyeditor {
+  border: 1px solid #CCC;
+  padding: 0;
+  -moz-box-shadow: 2px 2px 2px #CCC;
+}

new file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..887daf052a6eda0b463bd75ca65dd998449cd330
GIT binary patch
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B@QeTe

--- a/browser/themes/pinstripe/browser/jar.mn
+++ b/browser/themes/pinstripe/browser/jar.mn
@@ -121,16 +121,17 @@ browser.jar:
   skin/classic/browser/tabview/search.png                   (tabview/search.png)
   skin/classic/browser/tabview/stack-expander.png           (tabview/stack-expander.png)
   skin/classic/browser/tabview/tabview.png                  (tabview/tabview.png)
   skin/classic/browser/tabview/tabview.css                  (tabview/tabview.css)
   skin/classic/browser/devtools/arrows.png                  (devtools/arrows.png)
   skin/classic/browser/devtools/search.png                  (devtools/search.png)
   skin/classic/browser/devtools/csshtmltree.css             (devtools/csshtmltree.css)
   skin/classic/browser/devtools/gcli.css                    (devtools/gcli.css)
+  skin/classic/browser/devtools/toolbarbutton-close.png     (devtools/toolbarbutton-close.png)
   skin/classic/browser/devtools/breadcrumbs/ltr-end-pressed.png              (devtools/breadcrumbs/ltr-end-pressed.png)
   skin/classic/browser/devtools/breadcrumbs/ltr-end-selected-pressed.png     (devtools/breadcrumbs/ltr-end-selected-pressed.png)
   skin/classic/browser/devtools/breadcrumbs/ltr-end-selected.png             (devtools/breadcrumbs/ltr-end-selected.png)
   skin/classic/browser/devtools/breadcrumbs/ltr-end.png                      (devtools/breadcrumbs/ltr-end.png)
   skin/classic/browser/devtools/breadcrumbs/ltr-middle-pressed.png           (devtools/breadcrumbs/ltr-middle-pressed.png)
   skin/classic/browser/devtools/breadcrumbs/ltr-middle-selected-pressed.png  (devtools/breadcrumbs/ltr-middle-selected-pressed.png)
   skin/classic/browser/devtools/breadcrumbs/ltr-middle-selected.png          (devtools/breadcrumbs/ltr-middle-selected.png)
   skin/classic/browser/devtools/breadcrumbs/ltr-middle.png                   (devtools/breadcrumbs/ltr-middle.png)

--- a/browser/themes/winstripe/browser/browser.css
+++ b/browser/themes/winstripe/browser/browser.css
@@ -2615,26 +2615,29 @@ panel[dimmed="true"] {
 }
 
 /* Highlighter */
 
 .highlighter-veil {
   background-color: rgba(0, 0, 0, 0.5);
 }
 
-#highlighter-close-button {
-  list-style-image: url("chrome://browser/skin/KUI-close.png");
-  top: 12px;
-  right: 12px;
-  cursor: pointer;
-}
-
-#highlighter-close-button:-moz-locale-dir(rtl)  {
-  right: auto;
-  left: 12px;
+#highlighter-closebutton {
+  list-style-image: url("chrome://browser/skin/devtools/toolbarbutton-close.png");
+  -moz-image-region: rect(0, 16px, 16px, 0);
+  min-width: 16px;
+  width: 16px;
+}
+
+#highlighter-closebutton:hover {
+  -moz-image-region: rect(0, 32px, 16px, 16px);
+}
+
+#highlighter-closebutton:active {
+  -moz-image-region: rect(0, 48px, 16px, 32px);
 }
 
 #highlighter-veil-transparentbox {
   box-shadow: 0 0 0 1px rgba(0,0,0,0.5);
   outline: 1px dashed rgba(255,255,255,0.5);
   outline-offset: -1px;
 }
 
@@ -2642,22 +2645,27 @@ panel[dimmed="true"] {
   box-shadow: 0 0 0 1px black;
   outline-color: white;
 }
 
 /* Highlighter toolbar */
 
 #inspector-toolbar {
   -moz-appearance: none;
-  padding: 0 3px 4px;
+  padding: 4px 3px;
   border-top: 1px solid hsla(211,68%,6%,.65) !important;
   box-shadow: 0 1px 0 hsla(209,29%,72%,.25) inset;
   background-image: -moz-linear-gradient(top, hsl(209,18%,34%), hsl(210,24%,16%));
 }
 
+#inspector-toolbar[treepanel-open] {
+  padding-top: 0;
+  -moz-padding-end: 0;
+}
+
 #inspector-inspect-toolbutton,
 #inspector-tools > toolbarbutton {
   -moz-appearance: none;
   min-width: 78px;
   min-height: 22px;
   color: hsl(210,30%,85%);
   text-shadow: 0 -1px 0 hsla(210,8%,5%,.45);
   border: 1px solid hsla(211,68%,6%,.5);
@@ -2693,20 +2701,16 @@ panel[dimmed="true"] {
 
 /* Highlighter - toolbar resizers */
 
 .inspector-resizer {
   -moz-appearance: none;
   cursor: n-resize;
 }
 
-.inspector-resizer[disabled] {
-  visibility: hidden;
-}
-
 #inspector-top-resizer {
   background: none;
   height: 4px;
 }
 
 #inspector-end-resizer {
   width: 12px;
   height: 8px;

--- a/browser/themes/winstripe/browser/devtools/csshtmltree.css
+++ b/browser/themes/winstripe/browser/devtools/csshtmltree.css
@@ -182,9 +182,94 @@ a.link:visited {
 .userStyles {
   position: relative;
   top: 3px;
 }
 
 .userStyles,
 .userStylesLabel {
   cursor: pointer;
-}
\ No newline at end of file
+}
+
+/**
+ * CSS Rule View
+ */
+
+.ruleview {
+  background-color: #FFF;
+}
+
+.ruleview-rule-source {
+  background-color: -moz-dialog;
+  padding: 2px;
+}
+
+.ruleview-code {
+  padding: 2px;
+}
+
+.ruleview-propertylist {
+  list-style: none;
+  padding: 0;
+  margin: 0;
+}
+
+.ruleview-enableproperty {
+  height: 10px;
+  width: 10px;
+  -moz-margin-start: 2px;
+  -moz-margin-end: 0;
+}
+
+.ruleview-expander {
+  display: inline-block;
+  width: 8px;
+  height: 8px;
+  background: url("chrome://browser/skin/devtools/arrows.png") 24px 0;
+  cursor: pointer;
+  -moz-margin-start: 2px;
+  -moz-margin-end: 5px;
+}
+
+.ruleview-expander[dir="rtl"] {
+  background-position: 16px 0;
+}
+
+.ruleview-expander.styleinspector-open {
+  background-position: 8px 0;
+}
+
+.ruleview-newproperty {
+  /* (enable checkbox width: 12px) + (expander width: 15px) */
+  -moz-margin-start: 27px;
+}
+
+.ruleview-propertyname {
+  display: inline-block;
+  padding: 1px 0;
+  cursor: text;
+  color: #0060C0;
+  text-decoration: inherit;
+}
+
+.ruleview-propertyvalue {
+  cursor: text;
+  text-decoration: inherit;
+}
+
+.ruleview-computedlist {
+  list-style: none;
+  padding: 0;
+}
+
+.ruleview-computed {
+  -moz-margin-start: 4em;
+}
+
+.ruleview-overridden {
+  text-decoration: line-through;
+}
+
+.styleinspector-propertyeditor {
+  border: 1px solid #CCC;
+  padding: 0;
+  -moz-box-shadow: 2px 2px 2px #CCC;
+}

new file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..4a58465b9b7ea3b3c7c14b36214524fb9b0e38b7
GIT binary patch
literal 898
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z-%C?*7{<E^ys6=GX#TF*%%jfDG@>G?$RO%(D9DVE2wO>|IdyGXXbKuAMWsXumi@rW
zizxG=3lSo^$*@vs{TpxZ=io>?+i~PBx_CVA-uLse=lObewsj)1Carg5ulx8l>ikEo
z`ThB`CSjy(=l*>gv)qjuW-uASvcvAuAyldwlHG@8CuIRJG;-)bbn4h)nLJiwD;QXI
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zOXt?Da^3BYD`qgT?4&fn^PSZ)tmf|fd~&a%LWcCpYeY?t8LySK1h|l$Enzj-?eR$0
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zCZnt+Kw$G`xu)h`UyI03Wyjk>a-*mSQPX2)GO!5)=%A`8+|&1d`tt{jBWilg5(OCD
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z3$P-@a`Vg*1sJLH%V2rA45)fbN@QFOFQ{=uO^+FjvX%hnva%#tSSS%a@m4kYcqs&;
zrpF8h);0hd93E|&n3{QqsOi}Sc;NR*e_5IIsd^2=H2r<{2co9O%w&|c1UQ?SDa{21
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z46NlTq^2(G6XvQK9cyVbPkyAS1yR#uW-|450sg+{(ee<90^F_eN|#}nM(5S=Q#Bs(
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zcR{zCE3f1Bl(ht?bGamtn=6fZd2(K_7xj8Y?{`E^j~NVXioXX4P%0hz%#N%g7-cO1
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--- a/browser/themes/winstripe/browser/jar.mn
+++ b/browser/themes/winstripe/browser/jar.mn
@@ -105,16 +105,17 @@ browser.jar:
         skin/classic/browser/tabview/stack-expander.png             (tabview/stack-expander.png)
         skin/classic/browser/tabview/tabview.png                    (tabview/tabview.png)
         skin/classic/browser/tabview/tabview-inverted.png           (tabview/tabview-inverted.png)
         skin/classic/browser/tabview/tabview.css                    (tabview/tabview.css)
         skin/classic/browser/devtools/arrows.png                    (devtools/arrows.png)
         skin/classic/browser/devtools/search.png                    (devtools/search.png)
         skin/classic/browser/devtools/csshtmltree.css               (devtools/csshtmltree.css)
         skin/classic/browser/devtools/gcli.css                      (devtools/gcli.css)
+        skin/classic/browser/devtools/toolbarbutton-close.png       (devtools/toolbarbutton-close.png)
         skin/classic/browser/devtools/breadcrumbs/ltr-end-pressed.png              (devtools/breadcrumbs/ltr-end-pressed.png)
         skin/classic/browser/devtools/breadcrumbs/ltr-end-selected-pressed.png     (devtools/breadcrumbs/ltr-end-selected-pressed.png)
         skin/classic/browser/devtools/breadcrumbs/ltr-end-selected.png             (devtools/breadcrumbs/ltr-end-selected.png)
         skin/classic/browser/devtools/breadcrumbs/ltr-end.png                      (devtools/breadcrumbs/ltr-end.png)
         skin/classic/browser/devtools/breadcrumbs/ltr-middle-pressed.png           (devtools/breadcrumbs/ltr-middle-pressed.png)
         skin/classic/browser/devtools/breadcrumbs/ltr-middle-selected-pressed.png  (devtools/breadcrumbs/ltr-middle-selected-pressed.png)
         skin/classic/browser/devtools/breadcrumbs/ltr-middle-selected.png          (devtools/breadcrumbs/ltr-middle-selected.png)
         skin/classic/browser/devtools/breadcrumbs/ltr-middle.png                   (devtools/breadcrumbs/ltr-middle.png)
@@ -256,16 +257,17 @@ browser.jar:
         skin/classic/aero/browser/tabview/stack-expander.png         (tabview/stack-expander.png)
         skin/classic/aero/browser/tabview/tabview.png                (tabview/tabview.png)
         skin/classic/aero/browser/tabview/tabview-inverted.png       (tabview/tabview-inverted.png)
         skin/classic/aero/browser/tabview/tabview.css                (tabview/tabview.css)
         skin/classic/aero/browser/devtools/arrows.png                (devtools/arrows.png)
         skin/classic/aero/browser/devtools/search.png                (devtools/search.png)
         skin/classic/aero/browser/devtools/csshtmltree.css           (devtools/csshtmltree.css)
         skin/classic/aero/browser/devtools/gcli.css                  (devtools/gcli.css)
+        skin/classic/aero/browser/devtools/toolbarbutton-close.png   (devtools/toolbarbutton-close.png)
         skin/classic/aero/browser/devtools/breadcrumbs/ltr-end-pressed.png              (devtools/breadcrumbs/ltr-end-pressed.png)
         skin/classic/aero/browser/devtools/breadcrumbs/ltr-end-selected-pressed.png     (devtools/breadcrumbs/ltr-end-selected-pressed.png)
         skin/classic/aero/browser/devtools/breadcrumbs/ltr-end-selected.png             (devtools/breadcrumbs/ltr-end-selected.png)
         skin/classic/aero/browser/devtools/breadcrumbs/ltr-end.png                      (devtools/breadcrumbs/ltr-end.png)
         skin/classic/aero/browser/devtools/breadcrumbs/ltr-middle-pressed.png           (devtools/breadcrumbs/ltr-middle-pressed.png)
         skin/classic/aero/browser/devtools/breadcrumbs/ltr-middle-selected-pressed.png  (devtools/breadcrumbs/ltr-middle-selected-pressed.png)
         skin/classic/aero/browser/devtools/breadcrumbs/ltr-middle-selected.png          (devtools/breadcrumbs/ltr-middle-selected.png)
         skin/classic/aero/browser/devtools/breadcrumbs/ltr-middle.png                   (devtools/breadcrumbs/ltr-middle.png)

--- a/dom/system/NetworkGeolocationProvider.js
+++ b/dom/system/NetworkGeolocationProvider.js
@@ -212,17 +212,17 @@ WifiGeoPositionProvider.prototype = {
     function encode(ap) {
       // make sure that the ssid doesn't contain any | chars.
       ap.ssid = ap.ssid.replace("|", "\\|");
       // gls service parses the | as fields
       return "&wifi=mac:"+ap.mac+"|ssid:"+ap.ssid+"|ss:"+ap.signal;
     };
 
     if (accessPoints) {
-        accessPoints.sort(sort).map(encode).join("");
+        providerUrl = providerUrl + accessPoints.sort(sort).map(encode).join("");
         // max length is 2k.  make sure we are under that
         let x = providerUrl.length - 2000;
         if (x >= 0) {
             // we need to trim
             let doomed = providerUrl.lastIndexOf("&", 2000);
             LOG("Doomed:"+doomed);
             providerUrl = providerUrl.substring(0, doomed);
         }

--- a/layout/generic/nsObjectFrame.cpp
+++ b/layout/generic/nsObjectFrame.cpp
@@ -822,26 +822,32 @@ nsObjectFrame::CallSetWindow(bool aCheck
   nsIFrame* rootFrame = rootPC->PresShell()->FrameManager()->GetRootFrame();
   nsRect bounds = GetContentRectRelativeToSelf() + GetOffsetToCrossDoc(rootFrame);
   nsIntRect intBounds = bounds.ToNearestPixels(appUnitsPerDevPixel);
   window->x = intBounds.x;
   window->y = intBounds.y;
   window->width = intBounds.width;
   window->height = intBounds.height;
 
-  // this will call pi->SetWindow and take care of window subclassing
-  // if needed, see bug 132759.
+  // Calling SetWindow might destroy this frame. We need to use the instance
+  // owner to clean up so hold a ref.
+  nsRefPtr<nsPluginInstanceOwner> instanceOwnerRef(mInstanceOwner);
+
+  // This will call pi->SetWindow and take care of window subclassing
+  // if needed, see bug 132759. Calling SetWindow can destroy this frame
+  // so check for that before doing anything else with this frame's memory.
   if (mInstanceOwner->UseAsyncRendering()) {
     rv = pi->AsyncSetWindow(window);
   }
   else {
     rv = window->CallSetWindow(pi);
   }
 
-  mInstanceOwner->ReleasePluginPort(window->window);
+  instanceOwnerRef->ReleasePluginPort(window->window);
+
   return rv;
 }
 
 bool
 nsObjectFrame::IsFocusable(PRInt32 *aTabIndex, bool aWithMouse)
 {
   if (aTabIndex)
     *aTabIndex = -1;

--- a/toolkit/content/widgets/videocontrols.xml
+++ b/toolkit/content/widgets/videocontrols.xml
@@ -472,16 +472,17 @@
                             this.setupStatusFader();
                             break;
                         case "ended":
                             this.setPlayButtonState(true);
                             // We throttle timechange events, so the thumb might not be
                             // exactly at the end when the video finishes.
                             this.showPosition(Math.round(this.video.currentTime * 1000),
                                               Math.round(this.video.duration * 1000));
+                            this.startFadeIn(this.controlBar);
                             this.setupStatusFader();
                             break;
                         case "volumechange":
                             var volume = this.video.muted ? 0 : Math.round(this.video.volume * 100);
                             this.setMuteButtonState(this.video.muted);
                             this.volumeControl.value = volume;
                             break;
                         case "loadedmetadata":
@@ -1018,17 +1019,18 @@
                                 else
                                     newval = oldval + maxtime / 10;
                                 this.video.currentTime = (newval <= maxtime ? newval : maxtime);
                                 break;
                             case "home": /* Seek to beginning */
                                 this.video.currentTime = 0;
                                 break;
                             case "end": /* Seek to end */
-                                this.video.currentTime = (this.video.duration || this.maxCurrentTimeSeen / 1000);
+                                if (this.video.currentTime != this.video.duration)
+                                    this.video.currentTime = (this.video.duration || this.maxCurrentTimeSeen / 1000);
                                 break;
                             default:
                                 return;
                         }
                     } catch(e) { /* ignore any exception from setting .currentTime */ }
 
                     event.preventDefault(); // Prevent page scrolling
                 },