No such problem here. Try deleting cookies (you'll have to log in again) and, if that doesn't work, try troubleshooting. There is also the option to 'forget' the site by right-clicking it in history and selecting Forget about this site. https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox#w_remove-a-single-website-from-your-history ---- https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems (also deals with hardware acceleration) https://support.mozilla.org/en-US/kb/troubleshoot-issues-related-to-add-ons