Gmail always signs me out of every account
Gmail has, everytime, for 3 straight months, constantly and semi-quickly, signs me out of every gmail account with and without presenting error code #2005. This issue can’t be caused by Google alone, because every Gmail account works perfectly on my roommate’s computer, on my smart phone and on my computer if I use Internet Explorer (which I haven't used for years). Yahoo mail, does interestingly, as will all other non-Gmail accounts, work flawlessly with Firefox. Perhaps the flaw is solely with Firefox when it handshakes with gmail's security protocol, because error code #2005 is what always pops up. Another error message says that Hangouts has not been signed in. And while I do have 2 phone numbers for two Gmail accounts, Gmail also signs me out of 4 other accounts that have no phone numbers.
Here's the list of troubleshooting steps attempted recently. If at all possible, I'd like to avoid resetting Firefox, unless I can see from your provision of the entire list of settings, what will be lost. Thank you, for your expert advice.
1. UPDATED BROWSER – DIDN’T WORK 2. REMOVED 25 VIRUSES – DIDN’T WORK 3. DISABLED ALL RECENTLY ADDED ADD-ONS – DIDN’T WORK 4. I’VE BEEN CLEARING HISTORY, COOKIES AND CACHE USING FIREFOX AND CC CLEANER DAILY AND FOR YEARS – DIDN’T WORK 5. USED CC CLEANER TO CLEAN UP REGISTRY – (EVERY COUPLE WEEKS FOR YEARS) – DIDN’T WORK 6. I REMOVED OVER 22 WINDOWS AND 1000 TABS – DIDN’T WORK 7. FIREFOX SETTINGS WAS JUST ALTERED TO CLOSE WITH CACHE AND COOKIES CLEANED OUT 8. I HAVE ALWAYS HAD WINDOWS SECURITY TURNED OFF – SO THAT’S NOT IT 9. I SIGNED INTO HANGOUTS FOR EACH OF 2 ACCOUNTS- STILL FAILS 10. It’s not the Windows software because Internet Explorer (which I hate using) works perfectly for days on end even after numerous sleep modes. 11. i Had this problem previously, but it mysteriously went away without troubleshooting anything that I can remember.