Stipefoarum foar Firefox

After updating to v120 my Firefox started behaving strangely. With v119 I was able to fire up my Linux and Firefox and had immediate access to both Gmail and Calendar. Now I am requested to sign in every time, are offered a Shareable Calendar (for which I have no use) and get a notification in my cell phone reporting a new login. It would appear that the problem lies in syncing as WhatsApp Web is also requesting scanning its QR code every time too. This is most annoying. No settings were changed after the update. As a temporary solution I grabbed a v119 tar.gz from my wife's laptop and installed it in mine. Now all is behaving normally as before. Am I doing something wrong? Will appreciate any help you can provide.

Reinstalled Firefox after a computer upgrade and now I'm stuck with a disconnected account and a sync loop. I login and it shows login confirmed but I look in the top right corner where you access your account and it shows that it's disconnected. On top of that, I backed up all of my tabs, favorites and passwords but I don't have the ability to import it from the back up. I'm only given the options to import from another browser. Any help in this matter is greatly appreciated.