diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index 64056c5a7bdf..a5ca5419331f 100644
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -4285,6 +4285,44 @@ function nsBrowserAccess() { }
 nsBrowserAccess.prototype = {
   QueryInterface: XPCOMUtils.generateQI([Ci.nsIBrowserDOMWindow, Ci.nsISupports]),
 
+  _openURIInNewTab: function(aURI, aOpener, aIsExternal) {
+    let win, needToFocusWin;
+
+    // try the current window.  if we're in a popup, fall back on the most recent browser window
+    if (window.toolbar.visible)
+      win = window;
+    else {
+      let isPrivate = PrivateBrowsingUtils.isWindowPrivate(aOpener || window);
+      win = RecentWindow.getMostRecentBrowserWindow({private: isPrivate});
+      needToFocusWin = true;
+    }
+
+    if (!win) {
+      // we couldn't find a suitable window, a new one needs to be opened.
+      return null;
+    }
+
+    if (aIsExternal && (!aURI || aURI.spec == "about:blank")) {
+      win.BrowserOpenTab(); // this also focuses the location bar
+      win.focus();
+      return win.gBrowser.selectedBrowser;
+    }
+
+    let loadInBackground = gPrefService.getBoolPref("browser.tabs.loadDivertedInBackground");
+    let referrer = aOpener ? makeURI(aOpener.location.href) : null;
+
+    let tab = win.gBrowser.loadOneTab(aURI ? aURI.spec : "about:blank", {
+                                      referrerURI: referrer,
+                                      fromExternal: aIsExternal,
+                                      inBackground: loadInBackground});
+    let browser = win.gBrowser.getBrowserForTab(tab);
+
+    if (needToFocusWin || (!loadInBackground && aIsExternal))
+      win.focus();
+
+    return browser;
+  },
+
   openURI: function (aURI, aOpener, aWhere, aContext) {
     var newWindow = null;
     var isExternal = (aContext == Ci.nsIBrowserDOMWindow.OPEN_EXTERNAL);
@@ -4311,41 +4349,8 @@ nsBrowserAccess.prototype = {
         newWindow = openDialog(getBrowserURL(), "_blank", "all,dialog=no", url, null, null, null);
         break;
       case Ci.nsIBrowserDOMWindow.OPEN_NEWTAB :
-        let win, needToFocusWin;
-
-        // try the current window.  if we're in a popup, fall back on the most recent browser window
-        if (window.toolbar.visible)
-          win = window;
-        else {
-          let isPrivate = PrivateBrowsingUtils.isWindowPrivate(aOpener || window);
-          win = RecentWindow.getMostRecentBrowserWindow({private: isPrivate});
-          needToFocusWin = true;
-        }
-
-        if (!win) {
-          // we couldn't find a suitable window, a new one needs to be opened.
-          return null;
-        }
-
-        if (isExternal && (!aURI || aURI.spec == "about:blank")) {
-          win.BrowserOpenTab(); // this also focuses the location bar
-          win.focus();
-          newWindow = win.content;
-          break;
-        }
-
-        let loadInBackground = gPrefService.getBoolPref("browser.tabs.loadDivertedInBackground");
-        let referrer = aOpener ? makeURI(aOpener.location.href) : null;
-
-        let tab = win.gBrowser.loadOneTab(aURI ? aURI.spec : "about:blank", {
-                                          referrerURI: referrer,
-                                          fromExternal: isExternal,
-                                          inBackground: loadInBackground});
-        let browser = win.gBrowser.getBrowserForTab(tab);
-
+        let browser = this._openURIInNewTab(aURI, aOpener, isExternal);
         newWindow = browser.contentWindow;
-        if (needToFocusWin || (!loadInBackground && isExternal))
-          newWindow.focus();
         break;
       default : // OPEN_CURRENTWINDOW or an illegal value
         newWindow = content;
@@ -4362,6 +4367,17 @@ nsBrowserAccess.prototype = {
     return newWindow;
   },
 
+  openURIInFrame: function browser_openURIInFrame(aURI, aOpener, aWhere, aContext) {
+    if (aWhere != Ci.nsIBrowserDOMWindow.OPEN_NEWTAB) {
+      dump("Error: openURIInFrame can only open in new tabs");
+      return null;
+    }
+
+    var isExternal = (aContext == Ci.nsIBrowserDOMWindow.OPEN_EXTERNAL);
+    let browser = this._openURIInNewTab(aURI, aOpener, isExternal);
+    return browser.QueryInterface(Ci.nsIFrameLoaderOwner);
+  },
+
   isTabContentWindow: function (aWindow) {
     return gBrowser.browsers.some(function (browser) browser.contentWindow == aWindow);
   },