Gesturefy: Navigate, operate, and browse faster with mouse gestures! A customizable Firefox mouse gesture add-on with a variety of different commands.

Why does the repo have a different icon than the addon? Very confusing.

I've been using Gesturefy for many years. I'm making heavy use of next, prev, close, reload tab actions. Sometimes I use primarily keyboard, and sometimes primarily the mouse. Left or right hand, combined, or just one of the two. I love Gesturefy.