hello, please enter about:crashes into the address bar, copy the latest few crash report ids & paste them here as a reply. this will probably help us better understand what's going wrong in your case. thank you...

Please do the following:

Update to Firefox 18.0.2

Disable Hardware Acceleration Turning off hardware acceleration

Scan for Viruses Troubleshoot Firefox issues caused by malware

And let us know if that works.

Also do provide the crash ID's requested above :)

bp-c2e7237d-639f-499d-8c74-6113d2121118 18/11/2012 16:45 bp-d7568455-2c24-45a8-96b8-ff0212120928 28/09/2012 23:19 7c5a77fc-d5e0-4261-a030-94ba2ef43903 15/05/2012 20:04 e5fb63fe-ac0d-4301-9c24-a0afd2c22072 17/01/2012 11:33 9d49a068-26f9-49a4-a5a7-3a5e9e6b822a 05/11/2011 20:32

The latest ones are too old I think. The problem's only been in the last couple of weeks at most.

So Firefox hasn't crashed, just been freezing?

Then update back to Firefox 18, try the steps above, and add another, Reset Firefox. Refresh Firefox - reset add-ons and settings

Yes it was crashing, just no reports. On starting up, there would be the mouse "busy" sign for a couple of seconds then nothing, or FF would come up as a window for a second then disappear and not be a running process in the background. Third time generally it would come up normally, but sometimes missing all the previously open tabs - when I'd close it and start again, and 2nd or third time the tabs would reappear.

OK did the virus check (hence the delay!) No problems. Upgraded to 18.02 with hardware acceleration OFF. It now seems to work fine after hibernation, standby and restarting FF several times. So it looks like you gave me the solution. I'll post again if it does show up the problem again, but it seemed to be a consistent behaviour after standby. Thanks!

Tried it with hardware acceleration ON again. Crashed twice on starting up. Turned it off again and it came up normally. Just to be sure to be sure!