My primary browser is Mozilla Firefox v3.0.1. The reason I champion that particular browser over others is because it has the most plugins available. If there is anything on the internet that can be done in a browser, chances are it will happen in Firefox first.
Plugins, while a blessing, can also be a curse. As cool as it is that you have tons of nifty add-ons to choose from, some of these add-ons may screw up your browser. How the screw-up occurs could be in any number of ways, but you know when you’re browser is screwed up.
Firefox browser problems don’t happen often, but when they do you can fix just about any of them by creating a new profile.
Close the browser first.
Do a run dialog and type firefox -P, then click OK.
This is what you will see by default:
If you want to "start over", delete the profile and all files associated with it. Note: You will lose all your bookmarks and browser settings when you do this. (For bookmarks you can retrieve them if you have Foxmarks installed.) Add-ons will remain installed.
When you create a brand new profile, Firefox will treat it as if you’ve just installed the browser for the first time.
If you’re not sure whether you want to delete the old profile, just create a new one. Firefox allows multiple profiles to be installed. From there you can troubleshoot to see if it fixed any issues you may have present.
For the add-ons present, they will "see" it also as a new installation so you can do additional troubleshooting that way.