Reply To: No “hide viewed” in Firefox Home › Forums › Support › No “hide viewed” in Firefox › Reply To: No “hide viewed” in Firefox January 28, 2022 at 3:15 am #4043 leedixParticipant Hmm. The newest version shows this when I try to load: “smuuvr-1.15.1.zip does not contain a valid manifest” Dl’d twice to make sure it wasn’t just the zip this time. This reply was modified 1 year, 2 months ago by leedix.