diff --git a/browser/components/sessionstore/test/browser_394759_basic.js b/browser/components/sessionstore/test/browser_394759_basic.js
index 7540698585f..fc162586d75 100644
--- a/browser/components/sessionstore/test/browser_394759_basic.js
+++ b/browser/components/sessionstore/test/browser_394759_basic.js
@@ -35,36 +35,6 @@
  *
  * ***** END LICENSE BLOCK ***** */
 
-function provideWindow(aCallback, aURL, aFeatures) {
-  function callback() {
-    executeSoon(function () {
-      aCallback(win);
-    });
-  }
-
-  let win = openDialog(getBrowserURL(), "", aFeatures || "chrome,all,dialog=no", aURL);
-
-  whenWindowLoaded(win, function () {
-    if (!aURL) {
-      callback();
-      return;
-    }
-    win.gBrowser.selectedBrowser.addEventListener("load", function() {
-      win.gBrowser.selectedBrowser.removeEventListener("load", arguments.callee, true);
-      callback();
-    }, true);
-  });
-}
-
-function whenWindowLoaded(aWin, aCallback) {
-  aWin.addEventListener("load", function () {
-    aWin.removeEventListener("load", arguments.callee, false);
-    executeSoon(function () {
-      aCallback(aWin);
-    });
-  }, false);
-}
-
 function test() {
   waitForExplicitFinish();
 
diff --git a/browser/components/sessionstore/test/browser_394759_behavior.js b/browser/components/sessionstore/test/browser_394759_behavior.js
index a2d8f8a84a9..cfecaa5051a 100644
--- a/browser/components/sessionstore/test/browser_394759_behavior.js
+++ b/browser/components/sessionstore/test/browser_394759_behavior.js
@@ -35,43 +35,13 @@
  *
  * ***** END LICENSE BLOCK ***** */
 
-function provideWindow(aCallback, aURL, aFeatures) {
-  function callback() {
-    executeSoon(function () {
-      aCallback(win);
-    });
-  }
-
-  let win = openDialog(getBrowserURL(), "", aFeatures || "chrome,all,dialog=no", aURL);
-
-  whenWindowLoaded(win, function () {
-    if (!aURL) {
-      callback();
-      return;
-    }
-    win.gBrowser.selectedBrowser.addEventListener("load", function() {
-      win.gBrowser.selectedBrowser.removeEventListener("load", arguments.callee, true);
-      callback();
-    }, true);
-  });
-}
-
-function whenWindowLoaded(aWin, aCallback) {
-  aWin.addEventListener("load", function () {
-    aWin.removeEventListener("load", arguments.callee, false);
-    executeSoon(function () {
-      aCallback(aWin);
-    });
-  }, false);
-}
-
 function test() {
   // This test takes quite some time, and timeouts frequently, so we require
   // more time to run.
   // See Bug 518970.
   requestLongerTimeout(2);
 
-  waitForExplicitFinish();  
+  waitForExplicitFinish();
 
   // helper function that does the actual testing
   function openWindowRec(windowsToOpen, expectedResults, recCallback) {
@@ -94,13 +64,14 @@ function test() {
       executeSoon(recCallback);
       return;
     }
+
     // hack to force window to be considered a popup (toolbar=no didn't work)
     let winData = windowsToOpen.shift();
     let settings = "chrome,dialog=no," +
                    (winData.isPopup ? "all=no" : "all");
     let url = "http://example.com/?window=" + windowsToOpen.length;
 
-    provideWindow(function (win) {
+    provideWindow(function onTestURLLoaded(win) {
       win.close();
       openWindowRec(windowsToOpen, expectedResults, recCallback);
     }, url, settings);
diff --git a/browser/components/sessionstore/test/browser_595601-restore_hidden.js b/browser/components/sessionstore/test/browser_595601-restore_hidden.js
index 3971a51d2a2..b53d92308a7 100644
--- a/browser/components/sessionstore/test/browser_595601-restore_hidden.js
+++ b/browser/components/sessionstore/test/browser_595601-restore_hidden.js
@@ -93,14 +93,6 @@ let TabsProgressListener = {
   }
 }
 
-// ----------
-function whenWindowLoaded(win, callback) {
-  win.addEventListener("load", function onLoad() {
-    win.removeEventListener("load", onLoad, false);
-    executeSoon(callback);
-  }, false);
-}
-
 // ----------
 function newWindowWithState(state, callback) {
   let opts = "chrome,all,dialog=no,height=800,width=800";
@@ -108,10 +100,10 @@ function newWindowWithState(state, callback) {
 
   registerCleanupFunction(function () win.close());
 
-  whenWindowLoaded(win, function () {
-    TabsProgressListener.init(win);
+  whenWindowLoaded(win, function onWindowLoaded(aWin) {
+    TabsProgressListener.init(aWin);
     TabsProgressListener.setCallback(callback);
 
-    ss.setWindowState(win, JSON.stringify(state), true);
+    ss.setWindowState(aWin, JSON.stringify(state), true);
   });
 }
diff --git a/browser/components/sessionstore/test/browser_701377.js b/browser/components/sessionstore/test/browser_701377.js
index e0c363dada4..e526b7eb745 100644
--- a/browser/components/sessionstore/test/browser_701377.js
+++ b/browser/components/sessionstore/test/browser_701377.js
@@ -27,14 +27,6 @@ function test() {
   });
 }
 
-// ----------
-function whenWindowLoaded(aWindow, aCallback) {
-  aWindow.addEventListener("load", function onLoad() {
-    aWindow.removeEventListener("load", onLoad, false);
-    executeSoon(aCallback);
-  }, false);
-}
-
 // ----------
 function newWindowWithState(aState, aCallback) {
   let opts = "chrome,all,dialog=no,height=800,width=800";
@@ -42,8 +34,8 @@ function newWindowWithState(aState, aCallback) {
 
   registerCleanupFunction(function () win.close());
 
-  whenWindowLoaded(win, function () {
-    ss.setWindowState(win, JSON.stringify(aState), true);
-    executeSoon(function () aCallback(win));
+  whenWindowLoaded(win, function onWindowLoaded(aWin) {
+    ss.setWindowState(aWin, JSON.stringify(aState), true);
+    executeSoon(function () aCallback(aWin));
   });
 }
diff --git a/browser/components/sessionstore/test/head.js b/browser/components/sessionstore/test/head.js
index a5f451d52c1..45715bbc10d 100644
--- a/browser/components/sessionstore/test/head.js
+++ b/browser/components/sessionstore/test/head.js
@@ -49,6 +49,28 @@ registerCleanupFunction(function () {
 // session restore tests to be run standalone without triggering errors.
 Cc["@mozilla.org/browser/clh;1"].getService(Ci.nsIBrowserHandler).defaultArgs;
 
+function provideWindow(aCallback, aURL, aFeatures) {
+  function callbackSoon(aWindow) {
+    executeSoon(function executeCallbackSoon() {
+      aCallback(aWindow);
+    });
+  }
+
+  let win = openDialog(getBrowserURL(), "", aFeatures || "chrome,all,dialog=no", aURL);
+  whenWindowLoaded(win, function onWindowLoaded(aWin) {
+    if (!aURL) {
+      info("Loaded a blank window.");
+      callbackSoon(aWin);
+      return;
+    }
+
+    aWin.gBrowser.selectedBrowser.addEventListener("load", function selectedBrowserLoadListener() {
+      aWin.gBrowser.selectedBrowser.removeEventListener("load", selectedBrowserLoadListener, true);
+      callbackSoon(aWin);
+    }, true);
+  });
+}
+
 // This assumes that tests will at least have some state/entries
 function waitForBrowserState(aState, aSetStateCallback) {
   let windows = [window];
@@ -198,6 +220,15 @@ function whenBrowserLoaded(aBrowser, aCallback) {
   }, true);
 }
 
+function whenWindowLoaded(aWindow, aCallback) {
+  aWindow.addEventListener("load", function windowLoadListener() {
+    aWindow.removeEventListener("load", windowLoadListener, false);
+    executeSoon(function executeWhenWindowLoaded() {
+      aCallback(aWindow);
+    });
+  }, false);
+}
+
 var gUniqueCounter = 0;
 function r() {
   return Date.now() + "-" + (++gUniqueCounter);