''locking this thread as duplicate, please continue at [https://support.mozilla.org/en-US/questions/1027905 /questions/1027905]'' I've had the occasional episode in which, after getting a "Shockwave Flash has crashed" message my FireFox is frozen. Aftet Task Manager to close the unresponsive program, and reopening FF, what comes up is an entirely blank white page, no task bars, no nothing other than a blue border. Upon closing that & restarting FF, I get my usual FF homepage (a blank page in my case), but on checking, all my group tabs are gone (my history is preserved). This time, after shutting down and restarting I got 2 FF pages, one without any tabs saved, the other with all the tabs I'd saved prior to the Shockwave crash. Can anyone give me any insight into what's happening here and how to prevent it since, on a prior occasion, the tab s didn't come back and I lost boucoup of tabs I really wanted. Thanks all...