Bug 707321 - Intermittent browser_581593.js | an unexpected uncaught JS exception reported through window.onerror - Script error. at :0 [r=dietrich]

This ignores the "attempt to run compile-and-go script on a cleared scope" exceptions.

browser/components/sessionstore/test/browser_581593.js

@@ -40,6 +40,7 @@ let stateBackup = ss.getBrowserState();
 function test() {
   /** Test for bug 581593 **/
   waitForExplicitFinish();
+  ignoreAllUncaughtExceptions();
 
   let oldState = { windows: [{ tabs: [{ entries: [{ url: "example.com" }] }] }]};
   let pageData = {