I had similar problems and a Refresh fixed it for me: https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings https://support.mozilla.o

I had similar problems and a Refresh fixed it for me: https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings https://support.mozilla.org/en-US/kb/refresh-firefox-reset-a... (note this will wipe out some settings)