Hi This does not sound like an issue with Firefox but is something that the Facebook support team should be able to help you with.

You could try deleting Cookies. If that doesn't work, try 'forgetting' the website. Right-click it in history and select "Forget about this site". ''Before doing either of those, make sure you have a record of your user name and password as you will have to log in again.'' https://support.mozilla.org/en-US/kb/clear-cookies-and-site-data-firefox https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox#w_remove-a-single-website-from-your-history ---- If neither of those fixes the issue, try restarting in troubleshoot mode. 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