My Firefox browser has been running ok on my laptop with Win10. Tried to load Firefox on to my Android phone and pair. Phone pair is successful from the point of view of the phone, but fails at the laptop due to Error 500. I have tried this several times, including disconnecting VPN. I don't want to go back to Chrome bloatware. I also note from searches that this is a long running problem that appears not to have been fixed! I am not tech savvy! Any advice please is welcome before I ditch Mozilla entirely