Windows 7, 6.0.2, http://i.imgur.com/qBmF9.jpg shows addons installed. issue has existed 2-3 weeks now. Firefox "stalls" (not a crash, just blue-circle, screen goes white, not responding) for approx 20 seconds, every 5-20 minutes. Sometimes random, sometimes seems to be triggered by opening new tabs, especially many new tabs. Does not happen in chrome, haven't tried IE. I had upload ping issues with my router, fixed them, problem persists. I can switch to other programs during the stalls, only firefox slows down. Any help? Sorry for the terse writing, I wrote this in the question box before realizing there was a details box I would be given later on.