Today I logged in after the new update. (Oct 4th). Firefox was stuck in a loop for looking for updates. I went round and round, couldn't solve it, finally decided to reinstall. When I reinstalled it said I already had an installation and asked if I wanted to open the existing application and keep all my settings etc., or not. I tried opening the exiting application, but it kept looping back with the same question, not opening the existing application. I ultimately told it to start fresh, even though I knew I would lose all my configurations, addons, etc. I then spent quite a bit of time reconfiguring everything. I turned on synch and kept the synch key. I closed the application, reopened it, and it put me back to the original screen for installing afresh, asking if I want to open the existing application or start again and lose all my configurations and data. It wouldn't let me open the existing so I reinstalled and had to begin again. I don't know what to do.

I'm on OS 15.6.1 (24G90) lapbook pro, I think it's called