Version 129.0.1 has crashed my browser

[AlastairKidd]

When trying to open my Firefox browser from the taskbar this week, I received an error notice saying version 129.0.1 not compatible with min Version>=129.0 max version<=129.0. It then closes. When I opened Firefox from the start menu it opened a completely new version  without any of my passwords, history or favourites. I now appear to have lost all of these. I can't trace any of these in my files. I've attempted to log in to Firefox but don't have my password since I haven't had to use it for years, but when going through the process of getting a new password, it came with a warning that I might lose all my history, password etc. I'm tempted to start over with Microsoft Edge. Any advice? 

[f1r3f0xM0z1lla]

Google how to located your favorites.  That stuff is likely auto- backed up in your computer.  If you have to reinstall firefox you may want to  duplicate  these "preferences" again.  Mine is located on the c drive under the mozilla firefox subdirectory, then under a folder called Defaults. Yours might be different.  I had similar experience to you losing my favorites.  My boyfriend's son remotely talked me through restoring  mine.  So theseis just general directions, you could google it for more clarity.  But I got my favorites, etc back! You likely can too.  Generally it's auto backed up.  Good luck!

[AlastairKidd]

Sorry for delayed response. Thanks for the tip and taking the time to reply. I can't locate them in the same place as yours but I'll google and keep searching.