We're still nearly half a year away from Firefox 57's release, so many add-ons, like Foxy Gestures, are still going to be a bit rough. There's no harm in sticki

We're still nearly half a year away from Firefox 57's release, so many add-ons, like Foxy Gestures, are still going to be a bit rough. There's no harm in sticking with FireGestures for now, knowing that replacements are in the works. (Though it's probably worth letting the Foxy Gestures author know what bits seem to be missing as a FireGestures user.)