Also good to start with a fresh profile[1], lots of times you may have some cruft built up in an old profile. 1: https://support.mozilla.org/en-US/kb/profile-m

Also good to start with a fresh profile[1], lots of times you may have some cruft built up in an old profile. 1: https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles https://support.mozilla.org/en-US/kb/profile-manager-create-...