I tried a fresh install and get "Firefox is already running" error
Win XP SP3. Links in web pages opened in Firefox were not working. I tried reinstalling latest Firefox version over existing version. Didn't help. Uninstalled Firefox, reinstalled; didn't help. Did a total uninstall including manually removing all Firefox files and folders. Rebooted in-between. Now I keep getting the error message "Firefox is already running ..." Tried the steps in the article in your database but no longer have a profile. Bottom line: can no longer install a working version of Firefox.
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You probably did delete the Firefox profile folder, but didn't remove the profiles.ini file, so Firefox isn't able to find the old profile and displays misleading and confusing error message.
- http://kb.mozillazine.org/profiles.ini_file
- https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding
You can delete profiles.ini to make Firefox create a new default profile or use the profile manager to create a new profile.
See "Basic Troubleshooting: Make a new profile":
I deleted the profiles.ini file and was then able successfully to install Firefox. I had lost all my bookmarks, but they had been exported to a different browser and I was able to restore them. Thanks very much!
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Modified by cor-el