In the address bar, type about:crashes<enter>. Note: If any reports do not have BP- in front of the numbers/letters, click it to submit them.

The crash report is several pages of data. We need the report numbers to see the whole report.

Using your mouse, mark the most recent 7 - 10 Submitted crash reports, and copy them. Now go to the reply box and paste them in.

For more help on crash reports, see; https://support.mozilla.org/en-US/kb/firefox-crashes-asking-support

Look on your desktop. Do you see a folder called; Old Firefox? Look inside. Look for the folder with the latest creation date.

https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible

Thank you for your prompt reply.

Here is the crash report ID: bp-441ce05d-1b30-4ffb-ae6b-a07ab0200814 14/08/2020, 08:29

The last crash report before the one above was way back in February.

I have looked on my Desktop but unfortunately there is no such folder.

Thanks again.

https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible

http://kb.mozillazine.org/Profile_folder_-_Firefox#Navigating_to_the_profile_folder

https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

Type about:profiles<enter> in the address bar. How many profiles are listed? How many should be there? Also, open the profile folder in your file explorer.

bp-441ce05d-1b30-4ffb-ae6b-a07ab0200814 Signature: googledrivesync64.dll | CFSIconOverlayManager::_GetFileOverlayInfo

Crash Reason EXCEPTION_ACCESS_VIOLATION_READ

googledrivesync64.dll = Google Inc

IDMShellExt64.dll = Internet Download Manager

FileSyncShell64.dll = Microsoft OneDrive Shell Extension

Make sure all programs are up to date.

Ahhhhhhhhhhhhhh that's it!

I do actually have 2 profiles. Coincidentally, about 3 days ago, I was reading a magazine that gave a tip on having an extra profile to keep business and pleasure separated. I thought that's a good idea. I can now see this new one was changed to the default one!

I've changed the first one back to default, launched it and hey presto, everything is back.

I think I'll delete the other one because I'll probably forget all this again!

Thank you so much for this, I wouldn't have figured it out at all.

I wonder why there's an issue with Google Drive because I didn't think there was a connection between the two programs as I don't use it via the browser. Internet Download Manager I do use and I know it has a dodgy reputation! Microsoft One Drive I don't use that all and wish I could disable that. Maybe that's why I've recently had a huge memory hog with Firefox?

Could I t trouble you for something else? Do you know if there's an extension or feature in Firefox where I can see how much memory each tab is using and so close them individually without having to restart the app?

Thank you again I really appreciate this.

I do actually have 2 profiles . . . I've changed the first one back to default, launched it and hey presto, everything is back.

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution.

Thank you for contacting Mozilla Support.

Do you know if there's an extension or feature in Firefox where I can see how much memory each tab is using

Type about:memory<enter> in the address bar. But I don't know how to use it.