Front-end part of bug 326009. r=mconnor, sr=neil

browser/base/content/tabbrowser.xml

@@ -657,7 +657,7 @@
                 // Clear focus outline before we draw on top of it
                 this.mCurrentBrowser.focusedElement.blur();
               }
-              this.mCurrentBrowser.setAttribute("type", "content");
+              this.mCurrentBrowser.setAttribute("type", "content-targetable");
             }
 
             var updatePageReport = false;
@@ -1114,7 +1114,7 @@
 
             var b = document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul",
                                              "browser");
-            b.setAttribute("type", "content");
+            b.setAttribute("type", "content-targetable");
             b.setAttribute("message", "true");
             b.setAttribute("contextmenu", this.getAttribute("contentcontextmenu"));
             b.setAttribute("tooltip", this.getAttribute("contenttooltip"));
@@ -1316,7 +1316,7 @@
             oldBrowser.removeEventListener("DOMTitleChanged", this.onTitleChanged, false);
 
             // We are no longer the primary content area.
-            oldBrowser.setAttribute("type", "content");
+            oldBrowser.setAttribute("type", "content-targetable");
 
             // Get the index of the tab we're removing before unselecting it
             var currentIndex = this.mTabContainer.selectedIndex;