Checker Plus for Gmail™ ਵਲੋਂ Jason Savard

5 ਵਿੱਚੋਂ 4.4 ਤਾਰੇ

srouquette ਵਲੋਂ ਪੜਤਾਲ

the extension doesn't sign in anymore, maybe due to the new firefox feature to prevent tracking (in the top-right menu)

Yes enabling that specific feature has been known to cause issues with the auto-detect, try the manual add method instead.