Can't log-in to credit union after 9-3-2026 update?

Can I switch back to the prior Firefox version? Thanks! You can uninstall and install an older version, but then you have to be careful How did you get the current version, if you have Windows to do it for you, it will update again unless you change that option Fx updates are frequent due to security issues. What you credit union didn't say, is if they use any third party cookies, which most sites do. In which case . . . Fx now automatically blocks third party/cross site cookies for safety. You can either get more info from the union to allow specific third parties or [Allow all cookies]