Hi Peter, > Another issue I have is about atlassian: When I open a link, usually a > login page is shown. Instead, FF crashes completely. Have you tried creating a second Firefox profile that doesn't have all of your customisations and seeing if this problem still occurs? https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles It might help isolate the cause. Firefox is my main browser and I've had no problems since upgrading to 65 on 2019-02-01. -- Cheers, Ralph.