Swipe

Turn on with:
#gu.prefs.switchOn=swipe-nav

Additionally, for clicks to cause a swipe:
#gu.prefs.switchOn=swipe-nav-on-click

Default is off. There's also a master switch for both behaviours.

Swipe is only enabled only on iOS and Chrome/Firefox on Android. To enable it on desktop borwsers (with arrow key triggers), do:
#gu.prefs.switchOn=swipe-nav-force