FireFox

Try this: https://support.mozilla.org/en-US/kb...sing-safe-mode
and this: https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings?redirectlocale=en-US&redirectslug=reset-firefox-easily-fix-most-problems

Hi:

In addition to the great advice already offered....

...Most problems with Firefox originate in the user's profile, not in the program itself.

A specific suggestion for the issue you report:

Firefox - Profile in Use

Then, there is a logical sequence for Firefox diagnostics, which (as already suggested) generally starts with Mozilla Safe Mode (not to be confused with Windows Safe Mode):

Firefox - Standard Diagnostic
or
Fix slowness, crashing, error messages and other problems

Resetting Firefox (as already suggested) is certainly a reasonable option, but there are other, less "destructive" steps one might consider first.
There are also more drastic steps, such as creating a new profile. This is sometimes the best way to get back up and running, if the existing profile is highly corrupted.

Please let us know if you need more help.

Thanks,
MM

To do suggested options I need to run Firefox which I can't.

rudolfo2 said:

To do suggested options I need to run Firefox which I can't.

That's why I suggested this for starters, for the issue you report::)

Firefox - Profile in Use

Scroll down on that page to the "Solutions" section.
The easiest way is to open the Windows Task Manager and to kill the Firefox process from there.
If that does not work, then proceed to the next steps in that tutorial: remove the "profile lock" file, etc.

Please let us know how that goes.

Thanks,
MM

MoxieMomma said:

That's why I suggested this for starters, for the issue you report::)

Firefox - Profile in Use

Scroll down on that page to the "Solutions" section.
The easiest way is to open the Windows Task Manager and to kill the Firefox process from there.
If that does not work, then proceed to the next steps in that tutorial: remove the "profile lock" file, etc.

Please let us know how that goes.

Thanks,
MM

Task Manager don't show Firefox running.

BunnyJ said:

Just a quick thought.. I found that restarting the PC is a fast way to get this issue to resolve.

My 2c on it.. Good luck...

Jeff

My bad!
I guess I assumed that the OP had already done that.
One should never assume anything!
------------------
Most problems originate in the user's profile, not in the program itself. But...

If restarting the computer does not fix the issue, and if it is not running in the background in Task Manager to kill, AND if you cannot run Firefox (to conduct routine troubleshooting)...

...then you might need to do something more drastic (e.g. rip out Firefox AND your user profile data).

I would definitely start by backing up at least your bookmarks, using the procedure described by @topguncdp.

Then, I might try the steps here:

Profile cannot be loaded

If that does not work, then you *might* need to reinstall Firefox completely (including starting a new profile).
This is pretty unusual and a bit of a last resort, but sometimes it's best, if one cannot do other steps, such as creating a new profile, etc.

Be sure you backup important data, such as bookmarks, before you do this.
(I do not recommend importing anything other than bookmarks from your "old" profile into your new one, as it may just carry over the corruption. If the profile is really messed up, it's best to start fresh.)

Uninstall Firefox

Let us know how it goes,
MM