Firefox 2.0.0.12 was released earlier today. Must users will get the automatic update notification in the next 24-48 hours. However you can manually download and install the new version by going to getfirefox.com or simply selecting “Check for Updates…” from the Help menu. Several bug and security fixes are included in this version, see the complete Firefox 2.0.0.12 Release Notes
Attention Firefox 1.5 Users: In case you haven’t noticed Mozilla has ended support for this version of Firefox back in May 2007 and you really should be using the newer Firefox 2.0 builds.
News Source: Mozilla Developers News
The Firefox Extension Guru's Blog 
To say I’m not pleased with the latest release (2.0.0.12) would be an enormous understatement. I read the warning about some add-ons not working, and I understand why they might present a problem, but it seems that I can no longer manage them at all – I can go to Tools/Add-ons and find my list, but clicking on anything at all locks the window and necessitates a Firefox restart. This applied to both extensions and themes. I hope this all gets sorted out before I’m forced to revert to the dreaded MSIE!
Same here. Exactly as you described. Hope it gets ironed out soon.
Strange, I have no problem with the addons window and 2.0.0.12.
The problem I did have was I got the Afrikaans version, then the French version, and finally the English version after clicking the download button a few times…
[…] , CyberNet , Firefox 2.0 (Bon Echo) , Mozilla Firefox I noticed a couple comments on the Firefox 2.0.0.12 Released post about issues with add-ons when upgrading to this new release. I did upgrade to the released […]
I am having no problems whatsoever with the Add-ons and 2.0.0.12.
Maybe my Extensions just aren’t as complicated as other peoples. *shrugs*
with frioefox preloader all you have to do is hit the restart button where its’s the one in addon manager window or one put in the start menu by extension. if i had a few more tech skills i’d use the firefox preloader to integrate firefox into the os like ie.