@pootmonkeySafari on iOS does work that way, depending on case:- if a link would automatically opens in a separate tab (target="_blank"), then the back gesture or the back button does close the tab that just got opened (this seems to happen either by...
With trackpad gestures now available in Firefox for Windows, I think this becomes more prominent for everyone using more than one type of device (especially Windows and Apple's products together) - because in the Mac/iOS ecosystem, the three-finger-s...