Hey, I can't shutdown Firefox, it keeps running in the background. Normally I could shut it down using Taskmanager, but the process (firefox.exe) doesn't appear in Taskmanager anymore.
Now when I want to start Firefox I get a message saying "Reboot Firefox: Firefox is already active, but doesn't react. To open a new window first you should close the existing firefox-process, or reboot your system" (translated from Dutch text) .
The problem is that I can't find the running Firefox process and rebooting my system doesn't work either.
I've tried to uninstall and reinstall Firefox, but the problem still remains.

I use Windows XP Home Edition SP2 and Firefox 1.5.0.1



Can anyone help me?

Mod Bump

Try a fresh install of Firefox.

Note: You will have to go back and redo all of your personal settings (Options), as deleting the Profile folder will erase everything Firefox related.
You will be starting with a clean slate.

To completely uninstall Firefox, you will need to delete your Profile folder.
This file is not removed when you uninstall Firefox from Add/Remove.
It will retain all of your previous settings, and re-apply them to your new install, if it's not deleted.
That's why, when you install a new version of Firefox, your previous settings, bookmarks, passwords, etc., all remain the same.
For a Fresh (start from scratch) install, this folder has to be removed.

You might want to make a copy of the Bookmark.html file, before you uninstall, and save it to somewhere you'll be able to find it.
This is where all of your Bookmarks are stored.
Set windows to show hidden files,
How to see hidden files in Windows
Then navigate to:
C:\ Documents and Settings \ user name \ Application Data \ Mozilla \ Firefox \ Profiles \ default.random characters \ Bookmark.html
And make a copy of the Bookmark.html file

Then you can replace, the new one created, with the old one, you copied.
After you install Firefox, delete Bookmark.html, and replace it with your saved copy of Bookmark.html.
That way, you'll have all of your Bookmarks back.

Now for the uninstall.
Uninstall your current version of Firefox from Add/Remove programs.
Then navigate to:
C:\ Documents and Settings \ "your user name" \ Application Data \ Mozilla \ Firefox \ Profiles
Delete the Profiles folder (or send it to the Recycle Bin as a backup).
Then navigate to:
C: \ Program Files \ Mozilla Firefox, and delete that folder.
Then reinstall Firefox.

Don't forget to replace your Bookmark.html file.

I've deleted my old profile and created a new one, now everything is back to normal.
Thanks for the responses

You're welcome, Rabbi314.
Glad to be of help.