|The reset sounds like a really good start.|
They offer the reset with an option to keep bookmarks, home page, and similar 'whenever possible' which means that it will save these unless the install is really badly damaged.
I also recommend running Malwarebytes after the reset to make sure that there is not malware that might have caused the issue in the first place.
Firefox has been my browser choice for many years and I see no reason to abandon it, I still prefer it. My daughters happen to like Chrome, and that is OK too (for them).
You have to be a little bit crazy to keep you from going insane.