If you have an old Firefox profile hanging around, please reset it first: https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems https://su

If you have an old Firefox profile hanging around, please reset it first: https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems https://support.mozilla.org/en-US/kb/reset-firefox-easily-fi...