Please be patient, as BC staff are normally busy, and you will normally not get a quick response.
This happens to me all the time. And when it does say Mozilla is still running, it's because Firefox will only use one profile at a time. It does this by putting a lock file in your profile folder when it starts. When you exit Firefox, the lock file is removed. If the lock file already exists when you start Firefox, or in a few other cases where the profile cannot be opened, Firefox displays an error message: "Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system."
1) Empty the CacheTools
Also delete all History
You can also try forcing the page to reload from the Web by holding down <Shift> and clicking the reload button. This is not a fix, however.
If that does not work, you'll probably have to create a new profile.
Try the workarounds suggest on the Mozilla KB page here
Edited by KonamiYoto, 29 July 2009 - 06:34 PM.