Delete and Reinstall FFox
Asked earlier about deleting and doing a reinstall. Would that mean losing bookmarks, profile etc.? I have backed those up and would like to know if anything else might be required.
YoutubeTV is suddenly not working on Firefox, fine elsewhere ... they suggest doing complete reinstall.
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I suggest backing up the entire Mozilla folder containing the profile folder(s). The remedy seems extreme for an issue on one site. Try removing cookies or forgetting the site, otherwise troubleshooting.
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
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
Your Bookmarks and other stuff are not in the Firefox program folder but rather in a separate place.
https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data