I've tried logging off and on HN, and logon is fine (Linux, version 91). May be you can try: 1. Check the clock on your machine. Make sure it's not running a

I've tried logging off and on HN, and logon is fine (Linux, version 91). May be you can try: 1. Check the clock on your machine. Make sure it's not running at a time beyond 2038. 2. Check the disk space on your machine, especially where the profile is stored. Out of space error can be causing other errors. 3. Check the file system read/write permission on the profile folder. 4. Make sure there's not another instance of Firefox running. In fact, reboot just to be sure. 5. Try older versions of Firefox, with the portable versions. There's a command line argument to use an existing profile or a new one. Try those. This would narrow the problem down to whether it's caused by your machine or versions of Firefox. https://mozilla-firefox-portable.en.uptodown.com/windows/versions https://mozilla-firefox-portable.en.uptodown.com/windows/ver... Good luck.