I-Firefox Isithangami Sokwesekwa

All my bookmarks and passwords just vanished last night. No update installed, no new programs. I was watching a film from a legal subscription service and firefox crashed and when it restarted, they were gone. I have tried re importing them to no avail. I have uninstalled and reinstalled firefox and no difference. Chrome (which i had never used) imported the bookmarks and passwords I can't see from firefox so they are still there somewhere but firefox just shows a "cannot access bookmarks" warning at the top of the screen.

I need idiot proof instructions that actually work as I have always used firefox and can't get used to a new browser but need my tabs and bookmarks and passwords back.

As the title states. My PC turned off suddenly because of the breaker. When I turned it back on firefox didn't recognize my profile anymore, and nothing I tried worked. As far as I can see, the folder is completely fine and all the data is there.

I installed multiple language dictionaries for spellchecking from the "add dictionaries" menu. Despite this, after restarting the browser (and the computer) multiple times, no matter what I do, they don't show up in the spellcheck menu, the only option is still default "Polish" (language of my operating system). This is really annoying as I practically don't use Polish internet, so I would like to get English spellchecking. I even changed the Firefox interface language to English, but it didn't do anything.

I intend to upgrade my desktop PC from Win 8.1 to Win 10 soon due to Microsoft discontinuing support for 8.1 next January and I want to know how to preserve all my current settings in Firefox (including saved Pocket articles). Also, does anyone know for certain whether or not Firefox will be automatically migrated to Win 10 in the upgrade? (If it does, maybe that will answer my first question?)

An automatic update of Firefox which resulted in a "quit/create new profile" choice has removed all my bookmarks

Of the four profiles stored in "about:profile" three are identical (ie. have only the default bookmarks stored) and one, generates a "quit/create new profile" message.

The "bookmarksbackup" folder (in /home/user/.Mozilla/Firefox/zs1jki8t.default) is empty.

The "import/backup" option (in Manage Bookmarks) offers nothing to choose. There is no 'list of dated automatic backups.'

Firefox did not create an "Old Firefox Data" folder on the desktop.

Browser privacy "strict". "Never remember history" was selected.

Running Firefox in Manjaro (Linux)

Help.

Copy history is saved after closing firefox and reopening. Reboot windows pc is the only way to purge cached content.

Dell PC windows 10 64 bit

Firefox 96.0.3 (64-bit)

Any information copied is saved after manually "clearing Data" Close firefox and reopen "Ctrl V" in search bar and information reappears.

The browser was working fine up to a few months ago but I didn't start looking into the issue until now

Youtube works fine but twitter, facebook and netflix don't load with error messages like "The media could not be played" and "Sorry, we're having trouble with playing this video."

I've tried different browsers and they work fine on chrome but not on Opera GX

I'm on windows 10 pro, so I don't have the issue with the N versions

Things I've looked at:

• My internet connection is fine;
• Firefox is up to date;
• Cache and cookies have been cleared;
• Add ons/extensions have been disabled;
• Autoplay has been disabled and then also tested with it enabled;
• Hardware acceleration was disabled;
• Firefox was restarted;
• I even downgraded to an older version