The same thing every other sane gesture extension does. A. Use normal gestures. Right click and mouse drag right-left depending. Also, for back, 90% of users have a back button on mouse. And also, 90% times people use back instead of forward while browsing. So I'd say, making life easier to navigate between tabs is much more essential than going back or forward, since you are already able to do that.
Posts made by jastonas
RE: Add next-previous tab to rocker gestures.Suggestions and feature requests
Add next-previous tab to rocker gestures.Suggestions and feature requests
Most gestures extensions on the most popular browsers (Chrome/Firefox) have this by default. Left-Click followed by right-click switches to next tab, and right-click followed by left-click switches to previous tab. Very precious feature!