Firefox very very slow starting
Every version higher than 3.6 takes a very long time to start. I have checked my anti-virus and firewall settings and they are all good. This problem does not occur with 3.6.
Alla svar (1)
Hi BCmorganti,
Have you looked at our performance troubleshooting section? There is a lot of good information in there that should help.
I'd try starting Firefox in Diagnose Firefox issues using Troubleshoot Mode too. If you don't have the issue while all of your add-ons, extensions, and themes are disabled, you can try adding them back in one by one until you find the culprit. You should look at the Extensions and Themes troubleshooting guide and the Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems article as well.
You could also try Creating a new profile.
Hopefully this helps!