Firefox 15 keeps crashing under OpenSuse 12.1, solution for some
Was very much annoyed when upgraded Firefox 12 to 15 from the OpenSuse 12.1 repository, it kept crashing every time I closed the browser....
Fortunately found a simple work around, go to Edit > Preferences > Advanced > Network > Settings > set to "No Proxy". Then close. It will (likely) crash after you save and close the browser that time, but when you start it back up, it should no longer crash when closing. Will see if makes any difference with the Flash crashing issues. Hope that helps some. Enjoy!