Hello,

Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

• On Windows you can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
• On Mac you can open Firefox 4.0+ in Safe Mode by holding the option key while starting Firefox.
• On Linux you can open Firefox 4.0+ in Safe Mode by quitting Firefox and then going to your Terminal and running: firefox -safe-mode (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
• Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

Once you get the pop-up, just select "'Start in Safe Mode"

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.

Thank you.

Please see the http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit article at mozillazine for fixing this.

Hi tried all that it just seems to be an intermittent problem as sometimes it does close down fully sometimes not.

Thanks for taking the time though its much appreciated.

Thanks for taking the time to reply this was useful although it has not solved the problem fully.

It seems to be intermittent issue sometimes it closes fully sometimes not. Will put up with it until the next upgrade, FF does seem to like to hog resources though, sometime I.E. is better for all its Microsoft and people don't like it.

Cheers

You may also wish to see if creating a new profile helps.

• Profile Manager - Create, remove or switch Firefox profiles