[RonanTheGrey]

> This doesn't happen for me on any of my Android browsers.

They're talking about a feature built into Safari on iOS that allows you to swipe between pages from the left and right edges of the screen. Since all browsers on iOS use Safari as the base, they will inherit this behavior unless they take specific steps to disable it, which most don't.

AMP breaks that behavior and although I don't use it, many many people on iOS do and are accustomed to it.