Reproduced on Firefox-cocoa, trunk 20061008. Steps to reproduce: 1. Crash Firefox somehow 2. Start up Firefox, and the Session Restore dialog pops up 3. Press Cmd-Q (Quit) Result: These errors are spewn to the console: ###!!! ASSERTION: Oops! You're asking for a weak reference to an object that doesn't support that.: 'factoryPtr', file nsWeakReference.cpp, line 109 JavaScript error: , line 0: uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIObserverService.removeObserver]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: chrome://browser/content/browser.js :: BrowserShutdown :: line 1048" data: no] JavaScript error: , line 0: uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIObserverService.removeObserver]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: chrome://browser/content/search/search.xml :: :: line 110" data: no]

This should be fixed once the Session Restore dialog is shown somewhat later in the game (as planned to happen in bug 354894).

Resolving as INVALID since the Session Restore prompt was removed in bug 448976.