Note that e10s is now enabled by default in some configurations in Firefox 48. If you have e10s enabled and are running a GTK3 build of Firefox, adding MOZ_USE_XINPUT2=1 to your environment (until bug 1207700 is fixed) should be all that's necessary for touch-scrolling to work.
Note that e10s is now enabled by default in some configurations in Firefox 48. If you have e10s enabled and are running a GTK3 build of Firefox, adding MOZ_USE_XINPUT2=1 to your environment (until bug 1207700 is fixed) should be all that's necessary for touch-scrolling to work.