I can't even get it to download from the FireFox for Andriod Add-on page. For 4 years I've tried to get this add-on & others downloaded, but, nothing, no error msgs - nothing happens. . . Likely a FireFox & maybe even and/or issue with Samsung.. But, have people really looked at the dysfunctional maze to try & contact Firefox or posts requesting info on the forum that go unanswered... O well, someone finally needs to get a 1 star after 4 yrs.... Sorry