diff --git a/browser/base/Makefile.in b/browser/base/Makefile.in
index 3a894429b065..446fbb752bef 100644
--- a/browser/base/Makefile.in
+++ b/browser/base/Makefile.in
@@ -57,7 +57,6 @@ EXTRA_JS_MODULES = \
 	content/openLocationLastURL.jsm \
 	content/NetworkPrioritizer.jsm \
 	content/domplate.jsm \
-	content/stylePanel.jsm \
 	$(NULL)
 
 include $(topsrcdir)/config/rules.mk
diff --git a/browser/base/content/browser.xul b/browser/base/content/browser.xul
index a7189d0c9bc8..a4915d2a012a 100644
--- a/browser/base/content/browser.xul
+++ b/browser/base/content/browser.xul
@@ -249,26 +249,6 @@
                        accesskey="&inspectButton.accesskey;"
                        class="toolbarbutton-text"
                        command="Inspector:Inspect"/>
-        <toolbarbutton id="inspector-previous-toolbutton"
-                       label="&inspectPreviousButton.label;"
-                       accesskey="&inspectPreviousButton.accesskey;"
-                       class="toolbarbutton-text"
-                       command="Inspector:Previous"/>
-        <toolbarbutton id="inspector-next-toolbutton"
-                       label="&inspectNextButton.label;"
-                       accesskey="&inspectNextButton.accesskey;"
-                       class="toolbarbutton-text"
-                       command="Inspector:Next"/>
-        <toolbarbutton id="inspector-style-toolbutton"
-                       label="&inspectStyleButton.label;"
-                       accesskey="&inspectStyleButton.accesskey;"
-                       class="toolbarbutton-text"
-                       oncommand="InspectorUI.toggleStylePanel();"/>
-        <toolbarbutton id="inspector-dom-toolbutton"
-                       label="&inspectObjectButton.label;"
-                       accesskey="&inspectObjectButton.accesskey;"
-                       class="toolbarbutton-text"
-                       oncommand="InspectorUI.toggleDOMPanel();"/>
       </toolbar>
       <hbox id="tree-panel-resizer-box" align="end">
         <spacer flex="1" />
@@ -276,21 +256,6 @@
       </hbox>
     </panel>
 
-    <panel id="inspector-style-panel"
-           hidden="true"
-           orient="vertical"
-           ignorekeys="true"
-           noautofocus="true"
-           noautohide="true"
-           titlebar="normal"
-           label="&inspectStylePanelTitle.label;">
-        <listbox id="inspector-style-listbox" flex="1"/>
-        <hbox align="end">
-          <spacer flex="1" />
-          <resizer dir="bottomend"/>
-        </hbox>
-    </panel>
-
     <menupopup id="toolbar-context-menu"
                onpopupshowing="onViewToolbarsPopupShowing(event);">
       <menuseparator/>
diff --git a/browser/base/content/inspector.js b/browser/base/content/inspector.js
index 7fe792ae67e1..593948fe3dff 100644
--- a/browser/base/content/inspector.js
+++ b/browser/base/content/inspector.js
@@ -366,37 +366,6 @@ var InspectorUI = {
     }
   },
 
-  /**
-   * Toggle the style panel. Invoked from the toolbar's Style button.
-   */
-  toggleStylePanel: function IUI_toggleStylePanel()
-  {
-    if (this.isStylePanelOpen) {
-      this.stylePanel.hidePopup();
-    } else {
-      this.openStylePanel();
-      if (this.selection) {
-        this.updateStylePanel(this.selection);
-      }
-    }
-  },
-
-  /**
-   * Toggle the DOM panel. Invoked from the toolbar's DOM button.
-   */
-  toggleDOMPanel: function IUI_toggleDOMPanel()
-  {
-    if (this.isDOMPanelOpen) {
-      this.domPanel.hidePopup();
-    } else {
-      this.clearDOMPanel();
-      this.openDOMPanel();
-      if (this.selection) {
-        this.updateDOMPanel(this.selection);
-      }
-    }
-  },
-
   /**
    * Is the tree panel open?
    *
@@ -407,26 +376,6 @@ var InspectorUI = {
     return this.treePanel && this.treePanel.state == "open";
   },
 
-  /**
-   * Is the style panel open?
-   *
-   * @returns boolean
-   */
-  get isStylePanelOpen()
-  {
-    return this.stylePanel && this.stylePanel.state == "open";
-  },
-
-  /**
-   * Is the DOM panel open?
-   *
-   * @returns boolean
-   */
-  get isDOMPanelOpen()
-  {
-    return this.domPanel && this.domPanel.state == "open";
-  },
-
   /**
    * Return the default selection element for the inspected document.
    */
@@ -445,10 +394,17 @@ var InspectorUI = {
     this.ioBox = new InsideOutBox(this, this.treePanelDiv);
     this.ioBox.createObjectBox(this.win.document.documentElement);
     this.treeLoaded = true;
-    if (this.isTreePanelOpen && this.isStylePanelOpen &&
-        this.isDOMPanelOpen && this.treeLoaded) {
-      this.notifyReady();
-    }
+
+    // setup highlighter and start inspecting
+    this.initializeHighlighter();
+
+    // Setup the InspectorStore or restore state
+    this.initializeStore();
+
+    if (InspectorStore.getValue(this.winID, "inspecting"))
+      this.startInspecting();
+
+    this.notifyReady();
   },
 
   /**
@@ -471,26 +427,33 @@ var InspectorUI = {
       this.treeIFrame.setAttribute("onclick", "InspectorUI.onTreeClick(event)");
       this.treeIFrame = this.treePanel.insertBefore(this.treeIFrame, resizerBox);
     }
-    
+
+    let self = this;
+    this.treePanel.addEventListener("popupshown", function treePanelShown() {
+      InspectorUI.treePanel.removeEventListener("popupshown",
+        treePanelShown, false);
+
+      let src = InspectorUI.treeIFrame.getAttribute("src");
+      if (src != "chrome://browser/content/inspector.html") {
+        InspectorUI.treeIFrame.addEventListener("load",
+          function loadedInitializeTreePanel() {
+            InspectorUI.treeIFrame.removeEventListener("load",
+              loadedInitializeTreePanel, true);
+            InspectorUI.initializeTreePanel();
+          }, true);
+        InspectorUI.treeIFrame.setAttribute("src",
+          "chrome://browser/content/inspector.html");
+      } else {
+        InspectorUI.initializeTreePanel();
+      }
+    }, false);
+
     const panelWidthRatio = 7 / 8;
     const panelHeightRatio = 1 / 5;
     this.treePanel.openPopup(this.browser, "overlap", 80, this.win.innerHeight,
       false, false);
     this.treePanel.sizeTo(this.win.outerWidth * panelWidthRatio,
       this.win.outerHeight * panelHeightRatio);
-
-    let src = this.treeIFrame.getAttribute("src");
-    if (src != "chrome://browser/content/inspector.html") {
-      let self = this;
-      this.treeIFrame.addEventListener("DOMContentLoaded", function() {
-        self.treeIFrame.removeEventListener("DOMContentLoaded", arguments.callee, true);
-        self.initializeTreePanel();
-      }, true);
-
-      this.treeIFrame.setAttribute("src", "chrome://browser/content/inspector.html");
-    } else {
-      this.initializeTreePanel();
-    }
   },
 
   createObjectBox: function IUI_createObjectBox(object, isRoot)
@@ -600,55 +563,8 @@ var InspectorUI = {
   },
 
   /**
-   * Open the style panel if not already onscreen.
-   */
-  openStylePanel: function IUI_openStylePanel()
-  {
-    if (!this.stylePanel)
-      this.stylePanel = document.getElementById("inspector-style-panel");
-    if (!this.isStylePanelOpen) {
-      this.stylePanel.hidden = false;
-      // open at top right of browser panel, offset by 20px from top.
-      this.stylePanel.openPopup(this.browser, "end_before", 0, 20, false, false);
-      // size panel to 200px wide by half browser height - 60.
-      this.stylePanel.sizeTo(200, this.win.outerHeight / 2 - 60);
-    }
-  },
-
-  /**
-   * Open the DOM panel if not already onscreen.
-   */
-  openDOMPanel: function IUI_openDOMPanel()
-  {
-    if (!this.isDOMPanelOpen) {
-      this.domPanel.hidden = false;
-      // open at middle right of browser panel, offset by 20px from middle.
-      this.domPanel.openPopup(this.browser, "end_before", 0,
-        this.win.outerHeight / 2 - 20, false, false);
-      // size panel to 200px wide by half browser height - 60.
-      this.domPanel.sizeTo(200, this.win.outerHeight / 2 - 60);
-    }
-  },
-
-  /**
-   * Toggle the dimmed (semi-transparent) state for a panel by setting or
-   * removing a dimmed attribute.
-   *
-   * @param aDim
-   *        The panel to be dimmed.
-   */
-  toggleDimForPanel: function IUI_toggleDimForPanel(aDim)
-  {
-    if (aDim.hasAttribute("dimmed")) {
-      aDim.removeAttribute("dimmed");
-    } else {
-      aDim.setAttribute("dimmed", "true");
-    }
-  },
-
-  /**
-   * Open inspector UI. tree, style and DOM panels if enabled. Add listeners for
-   * document scrolling, resize, tabContainer.TabSelect and others.
+   * Open inspector UI. tree. Add listeners for document scrolling, 
+   * resize, tabContainer.TabSelect and others.
    */
   openInspectorUI: function IUI_openInspectorUI()
   {
@@ -661,44 +577,12 @@ var InspectorUI = {
       this.domplateUtils.setDOM(window);
     }
 
-    // DOM panel initialization and loading (via PropertyPanel.jsm)
-    let objectPanelTitle = this.strings.
-      GetStringFromName("object.objectPanelTitle");
-    let parent = document.getElementById("inspector-style-panel").parentNode;
-    this.propertyPanel = new (this.PropertyPanel)(parent, document,
-      objectPanelTitle, {});
-
-    // additional DOM panel setup needed for unittest identification and use
-    this.domPanel = this.propertyPanel.panel;
-    this.domPanel.setAttribute("id", "inspector-dom-panel");
-    this.domBox = this.propertyPanel.tree;
-    this.domTreeView = this.propertyPanel.treeView;
-
     // open inspector UI
     this.openTreePanel();
 
-    // style panel setup and activation
-    this.styleBox = document.getElementById("inspector-style-listbox");
-    this.clearStylePanel();
-    this.openStylePanel();
-
-    // DOM panel setup and activation
-    this.clearDOMPanel();
-    this.openDOMPanel();
-
-    // setup highlighter and start inspecting
-    this.initializeHighlighter();
-
-    // Setup the InspectorStore or restore state
-    this.initializeStore();
-
-    if (InspectorStore.getValue(this.winID, "inspecting"))
-      this.startInspecting();
-
     this.win.document.addEventListener("scroll", this, false);
     this.win.addEventListener("resize", this, false);
     this.inspectCmd.setAttribute("checked", true);
-    document.addEventListener("popupshown", this, false);
   },
 
   /**
@@ -774,8 +658,6 @@ var InspectorUI = {
       this.highlighter.unhighlight();
     }
 
-    if (this.isTreePanelOpen)
-      this.treePanel.hidePopup();
     if (this.treePanelDiv) {
       this.treePanelDiv.ownerPanel = null;
       let parent = this.treePanelDiv.parentNode;
@@ -795,19 +677,12 @@ var InspectorUI = {
       delete this.domplateUtils;
     }
 
-    if (this.isStylePanelOpen) {
-      this.stylePanel.hidePopup();
-    }
-    if (this.domPanel) {
-      this.domPanel.hidePopup();
-      this.domBox = null;
-      this.domTreeView = null;
-    }
     this.inspectCmd.setAttribute("checked", false);
     this.browser = this.win = null; // null out references to browser and window
     this.winID = null;
     this.selection = null;
     this.treeLoaded = false;
+    this.treePanel.hidePopup();
     this.closing = false;
     Services.obs.notifyObservers(null, "inspector-closed", null);
   },
@@ -820,8 +695,6 @@ var InspectorUI = {
   {
     this.attachPageListeners();
     this.inspecting = true;
-    this.toggleDimForPanel(this.stylePanel);
-    this.toggleDimForPanel(this.domPanel);
   },
 
   /**
@@ -834,8 +707,6 @@ var InspectorUI = {
       return;
     this.detachPageListeners();
     this.inspecting = false;
-    this.toggleDimForPanel(this.stylePanel);
-    this.toggleDimForPanel(this.domPanel);
     if (this.highlighter.node) {
       this.select(this.highlighter.node, true, true);
     }
@@ -860,148 +731,16 @@ var InspectorUI = {
       let box = this.ioBox.createObjectBox(this.selection);
       if (!this.inspecting) {
         this.highlighter.highlightNode(this.selection);
-        this.updateStylePanel(this.selection);
-        this.updateDOMPanel(this.selection);
       }
       this.ioBox.select(aNode, true, true, aScroll);
     }
   },
 
-  /////////////////////////////////////////////////////////////////////////
-  //// Model Creation Methods
-
-  /**
-   * Add a new item to the style panel listbox.
-   *
-   * @param aLabel
-   *        A bit of text to put in the listitem's label attribute.
-   * @param aType
-   *        The type of item.
-   * @param content
-   *        Text content or value of the listitem.
-   */
-  addStyleItem: function IUI_addStyleItem(aLabel, aType, aContent)
-  {
-    let itemLabelString = this.strings.GetStringFromName("style.styleItemLabel");
-    let item = document.createElement("listitem");
-
-    // Do not localize these strings
-    let label = aLabel;
-    item.className = "style-" + aType;
-    if (aContent) {
-      label = itemLabelString.replace("#1", aLabel);
-      label = label.replace("#2", aContent);
-    }
-    item.setAttribute("label", label);
-
-    this.styleBox.appendChild(item);
-  },
-
-  /**
-   * Create items for each rule included in the given array.
-   *
-   * @param aRules
-   *        an array of rule objects
-   */
-  createStyleRuleItems: function IUI_createStyleRuleItems(aRules)
-  {
-    let selectorLabel = this.strings.GetStringFromName("style.selectorLabel");
-
-    aRules.forEach(function(rule) {
-      this.addStyleItem(selectorLabel, "selector", rule.id);
-      rule.properties.forEach(function(property) {
-        if (property.overridden)
-          return; // property marked overridden elsewhere
-        // Do not localize the strings below this line
-        let important = "";
-        if (property.important)
-          important += " !important";
-        this.addStyleItem(property.name, "property", property.value + important);
-      }, this);
-    }, this);
-  },
-
-  /**
-   * Create rule items for each section as well as the element's style rules,
-   * if any.
-   *
-   * @param aRules
-   *        Array of rules corresponding to the element's style object.
-   * @param aSections
-   *        Array of sections encapsulating the inherited rules for selectors
-   *        and elements.
-   */
-  createStyleItems: function IUI_createStyleItems(aRules, aSections)
-  {
-    this.createStyleRuleItems(aRules);
-    let inheritedString =
-      this.strings.GetStringFromName("style.inheritedFrom");
-    aSections.forEach(function(section) {
-      let sectionTitle = section.element.tagName;
-      if (section.element.id)
-        sectionTitle += "#" + section.element.id;
-      let replacedString = inheritedString.replace("#1", sectionTitle);
-      this.addStyleItem(replacedString, "section");
-      this.createStyleRuleItems(section.rules);
-    }, this);
-  },
-
-  /**
-   * Remove all items from the Style Panel's listbox.
-   */
-  clearStylePanel: function IUI_clearStylePanel()
-  {
-    for (let i = this.styleBox.childElementCount; i >= 0; --i)
-      this.styleBox.removeItemAt(i);
-  },
-
-  /**
-   * Remove all items from the DOM Panel's listbox.
-   */
-  clearDOMPanel: function IUI_clearStylePanel()
-  {
-    this.domTreeView.data = {};
-  },
-
-  /**
-   * Update the contents of the style panel with styles for the currently
-   * inspected node.
-   *
-   * @param aNode
-   *        The highlighted node to get styles for.
-   */
-  updateStylePanel: function IUI_updateStylePanel(aNode)
-  {
-    if (this.inspecting || !this.isStylePanelOpen) {
-      return;
-    }
-
-    let rules = [], styleSections = [], usedProperties = {};
-    this.style.getInheritedRules(aNode, styleSections, usedProperties);
-    this.style.getElementRules(aNode, rules, usedProperties);
-    this.clearStylePanel();
-    this.createStyleItems(rules, styleSections);
-  },
-
-  /**
-   * Update the contents of the DOM panel with name/value pairs for the
-   * currently-inspected node.
-   */
-  updateDOMPanel: function IUI_updateDOMPanel(aNode)
-  {
-    if (this.inspecting || !this.isDOMPanelOpen) {
-      return;
-    }
-
-    this.domTreeView.data = aNode;
-  },
-
   /////////////////////////////////////////////////////////////////////////
   //// Event Handling
 
   notifyReady: function IUI_notifyReady()
   {
-    document.removeEventListener("popupshowing", this, false);
     Services.obs.notifyObservers(null, "inspector-opened", null);
   },
 
@@ -1018,15 +757,6 @@ var InspectorUI = {
     let inspectorClosed = false;
 
     switch (event.type) {
-      case "popupshown":
-        if (event.target.id == "inspector-tree-panel" ||
-            event.target.id == "inspector-style-panel" ||
-            event.target.id == "inspector-dom-panel")
-          if (this.isTreePanelOpen && this.isStylePanelOpen &&
-              this.isDOMPanelOpen && this.treeLoaded) {
-            this.notifyReady();
-          }
-        break;
       case "TabSelect":
         winID = this.getWindowID(gBrowser.selectedBrowser.contentWindow);
         if (this.isTreePanelOpen && winID != this.winID) {
@@ -1036,13 +766,17 @@ var InspectorUI = {
 
         if (winID && InspectorStore.hasID(winID)) {
           if (inspectorClosed && this.closing) {
-            Services.obs.addObserver(function () {
+            Services.obs.addObserver(function reopenInspectorForTab() {
+              Services.obs.removeObserver(reopenInspectorForTab,
+                "inspector-closed", false);
               InspectorUI.openInspectorUI();
             }, "inspector-closed", false);
           } else {
             this.openInspectorUI();
           }
-        } else if (InspectorStore.isEmpty()) {
+        }
+
+        if (InspectorStore.isEmpty()) {
           gBrowser.tabContainer.removeEventListener("TabSelect", this, false);
         }
         break;
@@ -1151,8 +885,6 @@ var InspectorUI = {
     this.selectEventsSuppressed = true;
     this.select(aNode, true, true);
     this.selectEventsSuppressed = false;
-    this.updateStylePanel(aNode);
-    this.updateDOMPanel(aNode);
   },
 
   /**
@@ -1284,6 +1016,25 @@ var InspectorUI = {
   {
     Services.console.logStringMessage(msg);
   },
+
+  /**
+   * Debugging function.
+   * @param msg
+   *        text to show with the stack trace.
+   */
+  _trace: function TRACE(msg)
+  {
+    this._log("TRACE: " + msg);
+    let frame = Components.stack.caller;
+    while (frame = frame.caller) {
+      if (frame.language == Ci.nsIProgrammingLanguage.JAVASCRIPT ||
+          frame.language == Ci.nsIProgrammingLanguage.JAVASCRIPT2) {
+        this._log("filename: " + frame.filename + " lineNumber: " + frame.lineNumber +
+          " functionName: " + frame.name);
+      }
+    }
+    this._log("END TRACE");
+  },
 }
 
 /**
@@ -1420,26 +1171,3 @@ XPCOMUtils.defineLazyGetter(InspectorUI, "inspectCmd", function () {
   return document.getElementById("Tools:Inspect");
 });
 
-XPCOMUtils.defineLazyGetter(InspectorUI, "strings", function () {
-  return Services.strings.createBundle("chrome://browser/locale/inspector.properties");
-});
-
-XPCOMUtils.defineLazyGetter(InspectorUI, "PropertyTreeView", function () {
-  var obj = {};
-  Cu.import("resource:///modules/PropertyPanel.jsm", obj);
-  return obj.PropertyTreeView;
-});
-
-XPCOMUtils.defineLazyGetter(InspectorUI, "PropertyPanel", function () {
-  var obj = {};
-  Cu.import("resource:///modules/PropertyPanel.jsm", obj);
-  return obj.PropertyPanel;
-});
-
-XPCOMUtils.defineLazyGetter(InspectorUI, "style", function () {
-  var obj = {};
-  Cu.import("resource:///modules/stylePanel.jsm", obj);
-  obj.style.initialize();
-  return obj.style;
-});
-
diff --git a/browser/base/content/stylePanel.jsm b/browser/base/content/stylePanel.jsm
deleted file mode 100644
index 21d8ceb1a1d8..000000000000
--- a/browser/base/content/stylePanel.jsm
+++ /dev/null
@@ -1,315 +0,0 @@
-/*
- * Software License Agreement (BSD License)
- *
- * Copyright (c) 2007, Parakey Inc.
- * All rights reserved.
- * 
- * Redistribution and use of this software in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- * 
- * * Redistributions of source code must retain the above
- *   copyright notice, this list of conditions and the
- *   following disclaimer.
- * 
- * * Redistributions in binary form must reproduce the above
- *   copyright notice, this list of conditions and the
- *   following disclaimer in the documentation and/or other
- *   materials provided with the distribution.
- * 
- * * Neither the name of Parakey Inc. nor the names of its
- *   contributors may be used to endorse or promote products
- *   derived from this software without specific prior
- *   written permission of Parakey Inc.
- * 
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
- * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * Creator:
- *  Joe Hewitt
- * Contributors
- *  John J. Barton (IBM Almaden)
- *  Jan Odvarko (Mozilla Corp.)
- *  Max Stepanov (Aptana Inc.)
- *  Rob Campbell (Mozilla Corp.)
- *  Hans Hillen (Paciello Group, Mozilla)
- *  Curtis Bartley (Mozilla Corp.)
- *  Mike Collins (IBM Almaden)
- *  Kevin Decker
- *  Mike Ratcliffe (Comartis AG)
- *  Hernan Rodríguez Colmeiro
- *  Austin Andrews
- *  Christoph Dorn
- *  Steven Roussey (AppCenter Inc, Network54)
- */
-
-var EXPORTED_SYMBOLS = ["style"];
-
-const Cc = Components.classes;
-const Ci = Components.interfaces;
-const Cu = Components.utils;
-
-Cu.import("resource://gre/modules/Services.jsm");
-
-var style = {
-
-  /**
-   * initialize domUtils
-   */
-  initialize: function CSS_initialize()
-  {
-    this.domUtils = Cc["@mozilla.org/inspector/dom-utils;1"].
-      getService(Ci["inIDOMUtils"]);
-  },
-
-  /**
-   * Is the given property sheet a system (user agent) stylesheet?
-   *
-   * @param aSheet
-   *        a stylesheet
-   */
-  isSystemStyleSheet: function CSS_isSystemStyleSheet(aSheet)
-  {
-    if (!aSheet)
-      return true;
-
-    let url = aSheet.href;
-
-    if (!url)
-      return false;
-    if (url.length == 0)
-      return true;
-    if (url[0] == 'h') 
-      return false;
-    if (url.substr(0, 9) == "resource:")
-      return true;
-    if (url.substr(0, 7) == "chrome:")
-      return true;
-    if (url  == "XPCSafeJSObjectWrapper.cpp")
-      return true;
-    if (url.substr(0, 6) == "about:")
-      return true;
-
-    return false;
-  },
-
-  /**
-   * Parse properties from a given style object.
-   * Borrowed from Firebug's css.js.
-   *
-   * @param aStyle
-   *        a style object
-   */
-  parseCSSProperties: function CSS_parseCSSProps(aStyle)
-  {
-    let properties = [];
-    let lines = aStyle.cssText.match(/(?:[^;\(]*(?:\([^\)]*?\))?[^;\(]*)*;?/g);
-    let propRE = /\s*([^:\s]*)\s*:\s*(.*?)\s*(! important)?;?$/;
-    let line, i = 0;
-    while(line = lines[i++]) {
-      let match = propRE.exec(line);
-      if (!match)
-        continue;
-      let name = match[1];
-      let value = match[2];
-      let important = !!match[3]; // true if match[3] is non-empty
-      properties.unshift({name: name, value: value, important: important});
-    }
-
-    return properties;
-  },
-
-  /**
-   * Mark properties overridden further up the hierarchy.
-   *
-   * @param aProps
-   *        Array of properties.
-   * @param aUsedProps
-   *        Object of arrays keyed by property name.
-   * @param aInherit
-   *        Boolean of whether or not we are in inherited mode.
-   */
-  markOverriddenProperties: function CSS_markOverriddenProperties(aProps, aUsedProps, aInherit)
-  {
-    for (let i = 0; i < aProps.length; ++i) {
-      let prop = aProps[i];
-      if (aUsedProps.hasOwnProperty(prop.name)) {
-        // all previous occurrences of this property
-        let deadProps = aUsedProps[prop.name];
-        for (let j = 0; j < deadProps.length; ++j) {
-          let deadProp = deadProps[j];
-          if (!deadProp.disabled && !deadProp.wasInherited &&
-              deadProp.important && !prop.important) {
-            prop.overridden = true;  // new occurrence overridden
-          } else if (!prop.disabled) {
-            deadProp.overridden = true;  // previous occurrences overridden
-          } else {
-            aUsedProps[prop.name] = [];
-          }
-
-          prop.wasInherited = aInherit ? true : false;
-          // all occurrences of a property seen so far, by name
-          aUsedProps[prop.name].push(prop);
-        }
-      }
-    }
-  },
-
-  /**
-   * Sort given properties in lexical order by name.
-   *
-   * @param properties
-   *        An array of properties.
-   * @returns sorted array.
-   */
-  sortProperties: function CSS_sortProperties(properties)
-  {
-    properties.sort(function(a, b)
-    {
-      if (a.name < b.name) {
-        return -1;
-      }
-      if (a.name > b.name) {
-        return 1;
-      }
-      return 0;
-    });
-  },
-
-  /**
-   * Get properties for a given element and push them to the rules array.
-   *
-   * @param aNode
-   *        a DOM node
-   * @param rules
-   *        An array of rules to add properties to.
-   * @param usedProps
-   *        Object of arrays keyed by property name.
-   * @param inherit
-   *        boolean determining whether or not we're in inherit mode
-   */
-  getStyleProperties: function CSS_getStyleProperties(aNode, aRules, aUsedProps, aInherit)
-  {
-    let properties = this.parseCSSProperties(aNode.style, aInherit);
-
-    this.sortProperties(properties);
-    this.markOverriddenProperties(properties, aUsedProps, aInherit);
-
-    if (properties.length) {
-      aRules.push({rule: aNode, selector: "element.style",
-        properties: properties, inherited: aInherit});
-    }
-  },
-
-  /**
-   * Get properties for a given rule.
-   *
-   * @param aRule
-   *        A Rule from a stylesheet.
-   */
-  getRuleProperties: function CSS_getRuleProperties(aRule)
-  {
-    let style = aRule.style;
-    return this.parseCSSProperties(style);
-  },
-
-  /**
-   * Recursively get rules for an element's parents and add them to the
-   * sections array.
-   *
-   * @param aNode
-   *        an element in a DOM tree.
-   * @param sections
-   *        an array of sections
-   * @param usedProps
-   *        Object of arrays keyed by property name.
-   */
-  getInheritedRules: function CSS_getInheritedRules(aNode, aSections, aUsedProps)
-  {
-    let parent = aNode.parentNode;
-    if (parent && parent.nodeType == 1) {
-      this.getInheritedRules(parent, aSections, aUsedProps);
-
-      let rules = [];
-      this.getElementRules(parent, rules, aUsedProps, true);
-
-      if (rules.length) {
-        aSections.unshift({element: parent, rules: rules});
-      }
-    }
-  },
-
-  /**
-   * Get the CSS style rules for a given node in the DOM and append them to the
-   * rules array.
-   *
-   * @param aNode
-   *        an element in the DOM tree.
-   * @param aRules
-   *        an array of rules.
-   * @param aUsedProps
-   *        Object of arrays keyed by property name.
-   * @param aInherit
-   *        boolean indicating whether we are in an inherited mode or not
-   */
-  getElementRules: function CSS_getElementRules(aNode, aRules, aUsedProps, aInherit)
-  {
-    let inspectedRules;
-
-    try {
-      inspectedRules = this.domUtils.getCSSStyleRules(aNode);
-    } catch (ex) {
-      Services.console.logStringMessage(ex);
-    }
-
-    if (!inspectedRules)
-      return;
-
-    for (let i = 0; i < inspectedRules.Count(); ++i) {
-      let rule = inspectedRules.GetElementAt(i);
-      let href = rule.parentStyleSheet.href;
-
-      if (!href) {
-        // Null href means inline style.
-        href = aNode.ownerDocument.location.href;
-      }
-
-      let isSystemSheet = this.isSystemStyleSheet(rule.parentStyleSheet);
-
-      if (isSystemSheet)
-        continue;
-
-      let properties = this.getRuleProperties(rule, aInherit);
-      if (aInherit && !properties.length)
-        continue;
-
-      let line = this.domUtils.getRuleLine(rule);
-      let ruleId = rule.selectorText + " " + href + " (" + line + ")";
-
-      let sourceLink = "view-source:" + href + "#" + line;
-
-      this.markOverriddenProperties(properties, aUsedProps, aInherit);
-
-      aRules.unshift(
-        {rule: rule,
-         id: ruleId,
-         selector: rule.selectorText,
-         properties: properties,
-         inherited: aInherit,
-         sourceLink: sourceLink,
-         isSystemSheet: isSystemSheet});
-    }
-
-    if (aNode.style) {
-      this.getStyleProperties(aNode, aRules, aUsedProps, aInherit);
-    }
-  },
-};
-
diff --git a/browser/base/content/test/Makefile.in b/browser/base/content/test/Makefile.in
index e8bc6f32657d..38db5cd0c832 100644
--- a/browser/base/content/test/Makefile.in
+++ b/browser/base/content/test/Makefile.in
@@ -183,8 +183,6 @@ _BROWSER_FILES = \
                  browser_inspector_initialization.js \
                  browser_inspector_treeSelection.js \
                  browser_inspector_highlighter.js \
-                 browser_inspector_stylePanel.js \
-                 browser_inspector_domPanel.js \
                  browser_inspector_iframeTest.js \
                  browser_inspector_scrolling.js \
                  browser_inspector_store.js \
diff --git a/browser/base/content/test/browser_inspector_domPanel.js b/browser/base/content/test/browser_inspector_domPanel.js
deleted file mode 100644
index 4d3f80fcd7c2..000000000000
--- a/browser/base/content/test/browser_inspector_domPanel.js
+++ /dev/null
@@ -1,171 +0,0 @@
-/* -*- Mode: C++; 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 Inspector DOM Panel Tests.
- *
- * The Initial Developer of the Original Code is
- * The Mozilla Foundation.
- * Portions created by the Initial Developer are Copyright (C) 2010
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *   Rob Campbell <rcampbell@mozilla.com>
- *   Mihai Șucan <mihai.sucan@gmail.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 ***** */
-
-let doc;
-let testGen;
-let newProperty;
-
-function createDocument()
-{
-  doc.body.innerHTML = '<div id="first" style="{ margin: 10em; ' +
-    'font-size: 14pt; font-family: helvetica, sans-serif; color: #AAA}">\n' +
-    '<h1>Some header text</h1>\n' +
-    '<p id="salutation" style="{font-size: 12pt}">hi.</p>\n' +
-    '<p id="body" style="{font-size: 12pt}">I am a test-case. This text exists ' +
-    'solely to provide some things to <span style="{color: yellow}">' +
-    'highlight</span> and <span style="{font-weight: bold}">count</span> ' +
-    'DOM list-items in the box at right. If you are reading this, ' +
-    'you should go do something else instead. Maybe read a book. Or better ' +
-    'yet, write some test-cases for another bit of code. ' +
-    '<span style="{font-style: italic}">Maybe more inspector test-cases!</span></p>\n' +
-    '<p id="closing">end transmission</p>\n' +
-    '</div>';
-  doc.title = "Inspector DOM Test";
-  Services.obs.addObserver(runDOMTests, "inspector-opened", false);
-  InspectorUI.openInspectorUI();
-}
-
-function nodeGenerator()
-{
-  let body = doc.body;
-  newProperty = "rand" + Date.now();
-  body[newProperty] = Math.round(Math.random() * 100);
-  InspectorUI.inspectNode(body);
-  yield;
-
-  let h1 = doc.querySelector("h1");
-  newProperty = "rand2" + Date.now();
-  h1[newProperty] = "test" + Math.random();
-  InspectorUI.inspectNode(h1);
-  yield;
-
-  let first = doc.getElementById("first");
-  newProperty = "rand3" + Date.now();
-  first[newProperty] = null;
-  InspectorUI.inspectNode(first);
-  yield;
-
-  let closing = doc.getElementById("closing");
-  newProperty = "bazbaz" + Date.now();
-  closing[newProperty] = false;
-  InspectorUI.inspectNode(closing);
-  yield;
-}
-
-function runDOMTests()
-{
-  InspectorUI._log("runDOMtests");
-  Services.obs.removeObserver(runDOMTests, "inspector-opened", false);
-  document.addEventListener("popupshown", performTestComparisons, false);
-  InspectorUI.stopInspecting();
-  testGen = nodeGenerator();
-  testGen.next();
-}
-
-function findInDOMPanel(aString)
-{
-  let treeView = InspectorUI.domTreeView;
-  let row;
-
-  for (let i = 0, n = treeView.rowCount; i < n; i++) {
-    row = treeView.getCellText(i, 0);
-    if (row && row.indexOf(aString) != -1) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-function performTestComparisons(evt)
-{
-  InspectorUI._log("performTestComparisons");
-  if (evt.target.id != "highlighter-panel")
-    return true;
-
-  let selection = InspectorUI.selection;
-
-  ok(selection, "selection");
-  ok(InspectorUI.isDOMPanelOpen, "DOM panel is open?");
-  ok(InspectorUI.highlighter.isHighlighting, "panel is highlighting");
-
-  let value = selection[newProperty];
-  if (typeof value == "string") {
-    value = '"' + value + '"';
-  }
-
-  ok(findInDOMPanel(newProperty + ': ' + value),
-    "domPanel shows the correct value for " + newProperty);
-
-  ok(findInDOMPanel('tagName: "' + selection.tagName + '"'),
-    "domPanel shows the correct tagName");
-
-  if (selection.id) {
-    ok(findInDOMPanel('id: "' + selection.id + '"'),
-      "domPanel shows the correct id");
-  }
-
-  try {
-    testGen.next();
-  } catch(StopIteration) {
-    document.removeEventListener("popupshown", performTestComparisons, false);
-    finishUp();
-  }
-}
-
-function finishUp() {
-  InspectorUI.closeInspectorUI();
-  gBrowser.removeCurrentTab();
-  finish();
-}
-
-function test()
-{
-  waitForExplicitFinish();
-  gBrowser.selectedTab = gBrowser.addTab();
-  gBrowser.selectedBrowser.addEventListener("load", function() {
-    gBrowser.selectedBrowser.removeEventListener("load", arguments.callee, true);
-    doc = content.document;
-    waitForFocus(createDocument, content);
-  }, true);
-
-  content.location = "data:text/html,basic tests for inspector";
-}
-
diff --git a/browser/base/content/test/browser_inspector_highlighter.js b/browser/base/content/test/browser_inspector_highlighter.js
index 82b2cab9fac5..08bd1f624ac9 100644
--- a/browser/base/content/test/browser_inspector_highlighter.js
+++ b/browser/base/content/test/browser_inspector_highlighter.js
@@ -102,6 +102,7 @@ function performTestComparisons(evt)
 
 function finishUp() {
   InspectorUI.closeInspectorUI();
+  ok(!InspectorUI.highlighter.isHighlighting, "panel is not highlighting");
   gBrowser.removeCurrentTab();
   finish();
 }
diff --git a/browser/base/content/test/browser_inspector_initialization.js b/browser/base/content/test/browser_inspector_initialization.js
index b56dcba65240..b439c71ccb5a 100644
--- a/browser/base/content/test/browser_inspector_initialization.js
+++ b/browser/base/content/test/browser_inspector_initialization.js
@@ -54,16 +54,12 @@ function runInspectorTests()
   is(InspectorUI.treeIFrame, iframe, "Inspector IFrame matches");
   ok(InspectorUI.inspecting, "Inspector is highlighting");
   ok(InspectorUI.isTreePanelOpen, "Inspector Tree Panel is open");
-  ok(InspectorUI.isStylePanelOpen, "Inspector Style Panel is open");
-  ok(InspectorUI.isDOMPanelOpen, "Inspector DOM Panel is open");
   InspectorUI.closeInspectorUI();
 }
 
 function finishInspectorTests()
 {
   Services.obs.removeObserver(finishInspectorTests, "inspector-closed", false);
-  ok(!InspectorUI.isDOMPanelOpen, "Inspector DOM Panel is closed");
-  ok(!InspectorUI.isStylePanelOpen, "Inspector Style Panel is closed");
   ok(!InspectorUI.isTreePanelOpen, "Inspector Tree Panel is closed");
   ok(!InspectorUI.inspecting, "Inspector is not highlighting");
   gBrowser.removeCurrentTab();
diff --git a/browser/base/content/test/browser_inspector_stylePanel.js b/browser/base/content/test/browser_inspector_stylePanel.js
deleted file mode 100644
index d4d2e7d165f2..000000000000
--- a/browser/base/content/test/browser_inspector_stylePanel.js
+++ /dev/null
@@ -1,124 +0,0 @@
-/* -*- Mode: C++; 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 Inspector Style Panel Tests.
- *
- * The Initial Developer of the Original Code is
- * The Mozilla Foundation.
- * Portions created by the Initial Developer are Copyright (C) 2010
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *   Rob Campbell <rcampbell@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 ***** */
-
-let doc;
-let spans;
-let testGen;
-
-function createDocument()
-{
-  doc.body.innerHTML = '<div id="first" style="{ margin: 10em; ' +
-    'font-size: 14pt; font-family: helvetica, sans-serif; color: #AAA}">\n' +
-    '<h1>Some header text</h1>\n' +
-    '<p id="salutation" style="{font-size: 12pt}">hi.</p>\n' +
-    '<p id="body" style="{font-size: 12pt}">I am a test-case. This text exists ' +
-    'solely to provide some things to <span style="{color: yellow}">' +
-    'highlight</span> and <span style="{font-weight: bold}">count</span> ' +
-    'style list-items in the box at right. If you are reading this, ' +
-    'you should go do something else instead. Maybe read a book. Or better ' +
-    'yet, write some test-cases for another bit of code. ' +
-    '<span style="{font-style: italic}">Maybe more inspector test-cases!</span></p>\n' +
-    '<p id="closing">end transmission</p>\n' +
-    '</div>';
-  doc.title = "Inspector Style Test";
-  setupStyleTests();
-}
-
-function setupStyleTests()
-{
-  spans = doc.querySelectorAll("span");
-  ok(spans, "captain, we have the spans");
-  Services.obs.addObserver(runStyleTests, "inspector-opened", false);
-  InspectorUI.openInspectorUI();
-}
-
-function spanGenerator()
-{
-  for (var i = 0; i < spans.length; ++i) {
-    InspectorUI.inspectNode(spans[i]);
-    yield;
-  }
-}
-
-function runStyleTests()
-{
-  Services.obs.removeObserver(runStyleTests, "inspector-opened", false);
-  document.addEventListener("popupshown", performTestComparisons, false);
-  InspectorUI.stopInspecting();
-  testGen = spanGenerator();
-  testGen.next();
-}
-
-function performTestComparisons(evt)
-{
-  if (evt.target.id != "highlighter-panel")
-    return true;
-
-  ok(InspectorUI.selection, "selection");
-  ok(InspectorUI.isStylePanelOpen, "style panel is open?");
-  ok(InspectorUI.highlighter.isHighlighting, "panel is highlighting");
-  ok(InspectorUI.styleBox.itemCount > 0, "styleBox has items");
-
-  try {
-    testGen.next();
-  } catch(StopIteration) {
-    document.removeEventListener("popupshown", performTestComparisons, false);
-    finishUp();
-  }
-}
-
-function finishUp() {
-  InspectorUI.closeInspectorUI();
-  gBrowser.removeCurrentTab();
-  finish();
-}
-
-function test()
-{
-  waitForExplicitFinish();
-  gBrowser.selectedTab = gBrowser.addTab();
-  gBrowser.selectedBrowser.addEventListener("load", function() {
-    gBrowser.selectedBrowser.removeEventListener("load", arguments.callee, true);
-    doc = content.document;
-    waitForFocus(createDocument, content);
-  }, true);
-  
-  content.location = "data:text/html,basic tests for inspector";
-}
-
diff --git a/browser/base/content/test/browser_inspector_tab_switch.js b/browser/base/content/test/browser_inspector_tab_switch.js
index 7ec32249d39c..d9793a9ae8e8 100644
--- a/browser/base/content/test/browser_inspector_tab_switch.js
+++ b/browser/base/content/test/browser_inspector_tab_switch.js
@@ -60,7 +60,6 @@ function inspectorUIOpen1()
   // Make sure the inspector is open.
   ok(InspectorUI.inspecting, "Inspector is highlighting");
   ok(InspectorUI.isTreePanelOpen, "Inspector Tree Panel is open");
-  ok(InspectorUI.isStylePanelOpen, "Inspector Style Panel is open");
   ok(!InspectorStore.isEmpty(), "InspectorStore is not empty");
   is(InspectorStore.length, 1, "InspectorStore.length = 1");
 
@@ -72,6 +71,7 @@ function inspectorUIOpen1()
   // Open the second tab.
   tab2 = gBrowser.addTab();
   gBrowser.selectedTab = tab2;
+
   gBrowser.selectedBrowser.addEventListener("load", function(evt) {
     gBrowser.selectedBrowser.removeEventListener(evt.type, arguments.callee,
       true);
@@ -86,12 +86,13 @@ function inspectorTabOpen2()
   // Make sure the inspector is closed.
   ok(!InspectorUI.inspecting, "Inspector is not highlighting");
   ok(!InspectorUI.isPanelOpen, "Inspector Tree Panel is closed");
-  ok(!InspectorUI.isStylePanelOpen, "Inspector Style Panel is closed");
   is(InspectorStore.length, 1, "InspectorStore.length = 1");
 
   // Activate the inspector again.
+  executeSoon(function() {
   Services.obs.addObserver(inspectorUIOpen2, "inspector-opened", false);
-  InspectorUI.openInspectorUI();
+    InspectorUI.openInspectorUI();
+  });
 }
 
 function inspectorUIOpen2()
@@ -101,7 +102,6 @@ function inspectorUIOpen2()
   // Make sure the inspector is open.
   ok(InspectorUI.inspecting, "Inspector is highlighting");
   ok(InspectorUI.isTreePanelOpen, "Inspector Tree Panel is open");
-  ok(InspectorUI.isStylePanelOpen, "Inspector Style Panel is open");
   is(InspectorStore.length, 2, "InspectorStore.length = 2");
 
   // Disable highlighting.
@@ -109,8 +109,10 @@ function inspectorUIOpen2()
   ok(!InspectorUI.inspecting, "Inspector is not highlighting");
 
   // Switch back to tab 1.
-  Services.obs.addObserver(inspectorFocusTab1, "inspector-opened", false);
-  gBrowser.selectedTab = tab1;
+  executeSoon(function() {
+    Services.obs.addObserver(inspectorFocusTab1, "inspector-opened", false);
+    gBrowser.selectedTab = tab1;
+  });
 }
 
 function inspectorFocusTab1()
@@ -120,7 +122,6 @@ function inspectorFocusTab1()
   // Make sure the inspector is still open.
   ok(InspectorUI.inspecting, "Inspector is highlighting");
   ok(InspectorUI.isTreePanelOpen, "Inspector Tree Panel is open");
-  ok(InspectorUI.isStylePanelOpen, "Inspector Style Panel is open");
   is(InspectorStore.length, 2, "InspectorStore.length = 2");
   is(InspectorUI.selection, div, "selection matches the div element");
 
@@ -136,7 +137,6 @@ function inspectorFocusTab2()
   // Make sure the inspector is still open.
   ok(!InspectorUI.inspecting, "Inspector is not highlighting");
   ok(InspectorUI.isTreePanelOpen, "Inspector Tree Panel is open");
-  ok(InspectorUI.isStylePanelOpen, "Inspector Style Panel is open");
   is(InspectorStore.length, 2, "InspectorStore.length = 2");
   isnot(InspectorUI.selection, div, "selection does not match the div element");
 
@@ -154,7 +154,6 @@ function inspectorTabUnload1(evt)
   // Make sure the Inspector is still open and that the state is correct.
   ok(!InspectorUI.inspecting, "Inspector is not highlighting");
   ok(InspectorUI.isTreePanelOpen, "Inspector Tree Panel is open");
-  ok(InspectorUI.isStylePanelOpen, "Inspector Style Panel is open");
   is(InspectorStore.length, 1, "InspectorStore.length = 1");
 
   InspectorUI.closeInspectorUI();
diff --git a/browser/locales/en-US/chrome/browser/browser.dtd b/browser/locales/en-US/chrome/browser/browser.dtd
index bc4dd094377c..9e7ef52a99d6 100644
--- a/browser/locales/en-US/chrome/browser/browser.dtd
+++ b/browser/locales/en-US/chrome/browser/browser.dtd
@@ -212,19 +212,6 @@ can reach it easily. -->
 <!ENTITY inspectPanelTitle.label      "HTML">
 <!ENTITY inspectButton.label          "Inspect">
 <!ENTITY inspectButton.accesskey      "I">
-<!ENTITY inspectNextButton.label      "Next">
-<!ENTITY inspectNextButton.accesskey  "N">
-<!ENTITY inspectPreviousButton.label  "Previous">
-<!ENTITY inspectPreviousButton.accesskey "P">
-<!ENTITY inspectStyleButton.label     "Style">
-<!ENTITY inspectStyleButton.accesskey "S">
-<!ENTITY inspectStylePanelTitle.label  "Style">
-<!-- LOCALIZATION NOTE (inspectObjectButton.label): This button label
-  -  appears on the Inspector's toolbar. It is used to open and close the Object
-  -  panel. There is also a label in inspector.properties for the panel
-  -  titlebar: object.objectPanelTitle. -->
-<!ENTITY inspectObjectButton.label       "Object">
-<!ENTITY inspectObjectButton.accesskey   "O">
 
 <!ENTITY fileMenu.label         "File"> 
 <!ENTITY fileMenu.accesskey       "F">
diff --git a/browser/locales/en-US/chrome/browser/inspector.properties b/browser/locales/en-US/chrome/browser/inspector.properties
deleted file mode 100644
index 70225d5efe82..000000000000
--- a/browser/locales/en-US/chrome/browser/inspector.properties
+++ /dev/null
@@ -1,16 +0,0 @@
-# LOCALIZATION NOTE  (style.selectorLabel): Used in the Inspector style panel
-#  to label a CSS Selector.
-style.selectorLabel=Selector
-
-# LOCALIZATION NOTE  (style.inheritedFrom): used in Style panel in
-#  inspector. Describes which tagname[#id] the properties are inherited from.
-style.inheritedFrom=Inherited from: #1
-
-# LOCALIZATION NOTE (style.styleItemLabel): used in Style panel in inspector.
-#  Used for construction of list items, #1 = label, #2 = content.
-style.styleItemLabel=#1: #2
-
-# LOCALIZATION NOTE (object.objectPanelTitle): used in the Object Panel in the
-#  Inspector tool. There's also inspectObjectButton in browser.dtd for the
-#  toolbar button which allows users to open/close the Object panel.
-object.objectPanelTitle=Object
diff --git a/browser/locales/jar.mn b/browser/locales/jar.mn
index 97599b5d8a38..50ee15f61fac 100644
--- a/browser/locales/jar.mn
+++ b/browser/locales/jar.mn
@@ -14,7 +14,6 @@
 *   locale/browser/browser.dtd                     (%chrome/browser/browser.dtd)
     locale/browser/baseMenuOverlay.dtd             (%chrome/browser/baseMenuOverlay.dtd)
     locale/browser/browser.properties              (%chrome/browser/browser.properties)
-    locale/browser/inspector.properties            (%chrome/browser/inspector.properties)
     locale/browser/scratchpad.properties           (%chrome/browser/scratchpad.properties)
     locale/browser/scratchpad.dtd                  (%chrome/browser/scratchpad.dtd)
     locale/browser/openLocation.dtd                (%chrome/browser/openLocation.dtd)