The System Details show you rune a very old Firefox 53 version. *User Agent: Mozilla/5.0 (Windows NT 6.1; rv:53.0) Gecko/20100101 Firefox/53.0 Can't you update via "Help -> About Firefox" as that is best to ensure that your profile keeps working ? Note that you need to update more than once until you reach the current release (94.0.1). *https://support.mozilla.org/en-US/kb/update-firefox-latest-release If updating from 53 isn't working then at least first install Firefox 72 and in that version update to the current release via "Help -> About Firefox". *https://download-installer.cdn.mozilla.net/pub/firefox/releases/72.0.2/ See also: *https://www.mozilla.org/en-US/firefox/all/#product-desktop-release