UPDATE 2: Disregard update 1: The problem's still there: If the computer goes into sleep or hibernate, Firefox hangs when I wake it up and the problem proceeds as describ… (read more)
UPDATE 2: Disregard update 1: The problem's still there: If the computer goes into sleep or hibernate, Firefox hangs when I wake it up and the problem proceeds as described. I think it's something to do with Firefox sync and/or various add-ons. I suppose I should now try the long process of gradually allowing sync permissions and add-ons until I find the particular one(s) that are causing the problem but I'd prefer not to! Any other sugestions?
UPDATE: This problem now seems to be fixed. I tried a clean install and it seems to be working, so far. The only difference is I'm no longer using AdBlock plus (coincidentally and unrelatedly), so it's possible that's what was causing the problem.
I'm running the latest vesion of Firefox on Windos 7 (32bit). It always works fine for the first few webpages but then hangs forever. Specifically, it appears to be loading the webpage, but nothing happens, not even the 'failed to load page'.
If at this point I close Firefox, it gives me the 'Firefox is running but not responding' message. If I try and close Firefox from task manager (which continues to show it using a big chunk of memory -- bigger than when it's actually running!), nothing happens.
At this point I'd tried all the obvious things: Refreshing Firefox, disabling add ons, etc. (there's no reason this should've been the problem since I use sync to run Firefox on Android and on another Windows 7 computer (64bit)). So I tried to uninstall Firefox, then reinstall it. When I went to run my newly-installed browser... Firefox was STILL running! I tried this again, from scratch, and found that it really was still open according to Task Manager, despite not appearing in the list of installed programs in the Control Panel!
So to summarise:
1) Firefox stops working after a while and hangs
2) It refuses to close even if it isn't actually on the PC anymore
3) The only way for me to fix this, so far, is to reboot my computer every time Firefox hangs... Which is all the time.