diff --git a/browser/components/bookmarks/content/bookmarks.js b/browser/components/bookmarks/content/bookmarks.js
index 8eb1e63a874e..d0d619749123 100644
--- a/browser/components/bookmarks/content/bookmarks.js
+++ b/browser/components/bookmarks/content/bookmarks.js
@@ -737,17 +737,19 @@ var BookmarksCommand = {
         // default to true: if it were false, we wouldn't get this far
         var warnOnOpen = { value: true };
  
-        var messageKey = "tabs.openWarningMultiple";
+        var messageKey = "tabs.openWarningMultipleBranded";
         var openKey = "tabs.openButtonMultiple";
 
         var buttonPressed = promptService.confirmEx(window,
             BookmarksUtils.getLocaleString("tabs.openWarningTitle"),
-            BookmarksUtils.getLocaleString(messageKey, [numTabsToOpen]),
+            BookmarksUtils.getLocaleString(messageKey, 
+              [numTabsToOpen, BookmarksUtils._brandShortName]),
             (promptService.BUTTON_TITLE_IS_STRING * promptService.BUTTON_POS_0)
             + (promptService.BUTTON_TITLE_CANCEL * promptService.BUTTON_POS_1),
             BookmarksUtils.getLocaleString(openKey),
             null, null,
-            BookmarksUtils.getLocaleString("tabs.openWarningPromptMe"),
+            BookmarksUtils.getLocaleString("tabs.openWarningPromptMeBranded",
+               [BookmarksUtils._brandShortName]),
             warnOnOpen);
 
          reallyOpen = (buttonPressed == 0);
diff --git a/browser/components/places/content/controller.js b/browser/components/places/content/controller.js
index 3ef091fa2778..4c4e7a59d6ad 100755
--- a/browser/components/places/content/controller.js
+++ b/browser/components/places/content/controller.js
@@ -1338,18 +1338,22 @@ var PlacesController = {
         // default to true: if it were false, we wouldn't get this far
         var warnOnOpen = { value: true };
 
-        var messageKey = "tabs.openWarningMultiple";
+        var messageKey = "tabs.openWarningMultipleBranded";
         var openKey = "tabs.openButtonMultiple";
         var strings = document.getElementById("placeBundle");
+        var brandBundle = document.getElementById("bundle_brand");
+        var brandShortName = brandBundle.getString("brandShortName");
        
         var buttonPressed = promptService.confirmEx(window,
           strings.getString("tabs.openWarningTitle"),
-          strings.getFormattedString(messageKey, [numTabsToOpen]),
+          strings.getFormattedString(messageKey, 
+            [numTabsToOpen, brandShortName]),
           (promptService.BUTTON_TITLE_IS_STRING * promptService.BUTTON_POS_0)
           + (promptService.BUTTON_TITLE_CANCEL * promptService.BUTTON_POS_1),
           strings.getString(openKey),
           null, null,
-          strings.getString("tabs.openWarningPromptMe"),
+          strings.getFormattedString("tabs.openWarningPromptMeBranded",
+            [brandShortName]),
           warnOnOpen);
 
          reallyOpen = (buttonPressed == 0);
diff --git a/browser/components/places/content/places.xul b/browser/components/places/content/places.xul
index 8a7db60a96d0..2be831a72e40 100755
--- a/browser/components/places/content/places.xul
+++ b/browser/components/places/content/places.xul
@@ -68,7 +68,7 @@
   <stringbundleset id="stringbundles">
     <stringbundle id="bundle_browser" src="chrome://browser/locale/browser.properties"/>
     <stringbundle id="placeBundle" src="chrome://browser/locale/places/places.properties"/>
-    <stringbundle id="brandBundle" src="chrome://branding/locale/brand.properties"/>
+    <stringbundle id="bundle_brand" src="chrome://branding/locale/brand.properties"/>
   </stringbundleset>
   
   <commandset id="TMCommandSet"
diff --git a/browser/components/preferences/tabs.xul b/browser/components/preferences/tabs.xul
index 7b423fb0a5f9..6f4fb385a2c8 100644
--- a/browser/components/preferences/tabs.xul
+++ b/browser/components/preferences/tabs.xul
@@ -78,11 +78,11 @@
     <!-- XXX flex below and on prefpane is a hack because wrapping checkboxes don't
              reflow properly; see bug 349098 -->
     <vbox id="tabPrefsBox" align="start" flex="1">
-      <checkbox id="warnCloseMultiple" label="&warnCloseMultiple.label;"
-                accesskey="&warnCloseMultiple.accesskey;"
+      <checkbox id="warnCloseMultiple" label="&warnCloseMultipleTabs.label;"
+                accesskey="&warnCloseMultipleTabs.accesskey;"
                 preference="browser.tabs.warnOnClose"/>
-      <checkbox id="warnOpenMany" label="&warnOpenMany.label;"
-                accesskey="&warnOpenMany.accesskey;"
+      <checkbox id="warnOpenMany" label="&warnOpenManyTabs.label;"
+                accesskey="&warnOpenManyTabs.accesskey;"
                 preference="browser.tabs.warnOnOpen"/>
       <checkbox id="showTabBar" label="&showTabBar.label;"
                 accesskey="&showTabBar.accesskey;"
diff --git a/browser/locales/en-US/chrome/browser/bookmarks/bookmarks.properties b/browser/locales/en-US/chrome/browser/bookmarks/bookmarks.properties
index 4ac222ea04f4..85f59661c6af 100644
--- a/browser/locales/en-US/chrome/browser/bookmarks/bookmarks.properties
+++ b/browser/locales/en-US/chrome/browser/bookmarks/bookmarks.properties
@@ -183,6 +183,6 @@ bookmarkCurTabTitle=Add Bookmark
 bookmarkAllTabsTitle=Bookmark All Tabs
 
 tabs.openWarningTitle=Confirm open
-tabs.openWarningMultiple=You are about to open %S tabs. Are you sure you want to open these tabs?
+tabs.openWarningMultipleBranded=You are about to open %S tabs.  This might slow down %S while the pages are loading.  Are you sure you want to continue?
 tabs.openButtonMultiple=Open tabs
-tabs.openWarningPromptMe=Warn me when I attempt to open a lot of tabs at once
+tabs.openWarningPromptMeBranded=Warn me when opening multiple tabs might slow down %S
diff --git a/browser/locales/en-US/chrome/browser/browser.properties b/browser/locales/en-US/chrome/browser/browser.properties
index fa5ede31b594..d2d40027e3ad 100644
--- a/browser/locales/en-US/chrome/browser/browser.properties
+++ b/browser/locales/en-US/chrome/browser/browser.properties
@@ -61,11 +61,6 @@ saveLinkErrorTitle=Save Link
 # Default name for the Web Panels sidebar
 webPanels=Web Panels
 
-tabs.closeWarningTitle=Confirm close
-tabs.closeWarning=This Browser window has %S tabs open. Do you want to close it and all its tabs?
-tabs.closeButton=Close all tabs
-tabs.closeWarningPromptMe=Warn me when closing multiple tabs
-
 xpinstallPromptWarning=%S prevented this site (%S) from asking you to install software on your computer.
 xpinstallPromptWarningButton=Edit Options...
 # Accessibility Note:
diff --git a/browser/locales/en-US/chrome/browser/places/places.properties b/browser/locales/en-US/chrome/browser/places/places.properties
index dcf5dddce2b2..19adce4d7e1f 100644
--- a/browser/locales/en-US/chrome/browser/places/places.properties
+++ b/browser/locales/en-US/chrome/browser/places/places.properties
@@ -62,6 +62,6 @@ searchCurrentDefault=Search in '%S'
 findInPrefix=Find in '%S'...
 
 tabs.openWarningTitle=Confirm open
-tabs.openWarningMultiple=You have asked to open %S tabs at once. This might slow down your system while the pages are loading.
+tabs.openWarningMultipleBranded=You are about to open %S tabs.  This might slow down %S while the pages are loading.  Are you sure you want to continue?
 tabs.openButtonMultiple=Open tabs
-tabs.openWarningPromptMe=Warn me when I attempt to open a lot of tabs at once
+tabs.openWarningPromptMeBranded=Warn me when opening multiple tabs might slow down %S
diff --git a/browser/locales/en-US/chrome/browser/preferences/tabs.dtd b/browser/locales/en-US/chrome/browser/preferences/tabs.dtd
index 97818c496d51..7c61f931c5ce 100644
--- a/browser/locales/en-US/chrome/browser/preferences/tabs.dtd
+++ b/browser/locales/en-US/chrome/browser/preferences/tabs.dtd
@@ -4,11 +4,11 @@
 <!ENTITY inNewTab.label               "a new tab">
 <!ENTITY inNewTab.accesskey           "t">
 
-<!ENTITY warnCloseMultiple.label      "Warn me when I close a window with multiple tabs">
-<!ENTITY warnCloseMultiple.accesskey  "m">
+<!ENTITY warnCloseMultipleTabs.label  "Warn me when closing multiple tabs">
+<!ENTITY warnCloseMultipleTabs.accesskey  "m">
 
-<!ENTITY warnOpenMany.label           "Warn me when I open lots of tabs at once">
-<!ENTITY warnOpenMany.accesskey       "o">
+<!ENTITY warnOpenManyTabs.label       "Warn me when opening multiple tabs might slow down &brandShortName;">
+<!ENTITY warnOpenManyTabs.accesskey   "o">
 
 <!ENTITY showTabBar.label             "Always show the tab bar">
 <!ENTITY showTabBar.accesskey         "b">
diff --git a/toolkit/content/widgets/tabbrowser.xml b/toolkit/content/widgets/tabbrowser.xml
index f8e1750f48ac..b75eb359c0ac 100644
--- a/toolkit/content/widgets/tabbrowser.xml
+++ b/toolkit/content/widgets/tabbrowser.xml
@@ -1275,7 +1275,7 @@
             if (!aAll)
               --tabsToClose;
 
-            var messageKey = (tabsToClose == 1) ? "tabs.closeWarningOne" : "tabs.closeWarningMultiple";
+            var messageKey = (tabsToClose == 1) ? "tabs.closeWarningOneTab" : "tabs.closeWarningMultipleTabs";
             var closeKey = (tabsToClose == 1) ? "tabs.closeButtonOne" : "tabs.closeButtonMultiple";
             // focus the window before prompting.
             // this will raise any minimized window, which will
diff --git a/toolkit/locales/en-US/chrome/global/tabbrowser.properties b/toolkit/locales/en-US/chrome/global/tabbrowser.properties
index 780e0b7469e6..c73ed3775a51 100644
--- a/toolkit/locales/en-US/chrome/global/tabbrowser.properties
+++ b/toolkit/locales/en-US/chrome/global/tabbrowser.properties
@@ -7,8 +7,8 @@ browsewithcaret.checkWindowTitle=Caret Browsing
 browsewithcaret.checkLabel=Pressing F7 turns Caret Browsing on or off. This feature places a moveable cursor in web pages, allowing you to select text with the keyboard. Do you want to turn Caret Browsing on?
 browsewithcaret.checkButtonLabel=Yes
 tabs.closeWarningTitle=Confirm close
-tabs.closeWarningOne=You are about to close %S open tab. Are you sure you want to continue?
-tabs.closeWarningMultiple=You are about to close %S open tabs. Are you sure you want to continue?
+tabs.closeWarningOneTab=You are about to close %S tab. Are you sure you want to continue?
+tabs.closeWarningMultipleTabs=You are about to close %S tabs. Are you sure you want to continue?
 tabs.closeButtonOne=Close tab
 tabs.closeButtonMultiple=Close tabs
-tabs.closeWarningPromptMe=Warn me when I attempt to close multiple tabs
\ No newline at end of file
+tabs.closeWarningPromptMe=Warn me when I attempt to close multiple tabs