1610504 - Hittesting difference when using touch in Chrome vs Gecko

Status: NEW

(Core :: Layout, enhancement)

Description

[Bas Schouten (:bas.schouten)]

There seems to be a difference in the grace area around an element with a click handler between Gecko and Chrome. This means that for example on a site like https://tickets.vangoghmuseum.com/?promo_creative=button&promo_pos=www-vgm&promo_name=tickets&promo_id=www-vgm-tickets-button, the month changing arrows are very small clickable elements. When trying to use them when zoomed out, it may appear unresponding on Gecko when you're not very accurately tapping. Chrome seems to give a much better experience in this scenario.

Comment 1

[Daniel Holbert [:dholbert]]

TYLin might know something about this, or might know who does, since he worked on mobile touch-input layout-related code (in particular, the accessible caret [which isn't involved here but is kinda similar])

Comment 2

[Ting-Yu Lin [:TYLin] (PST, UTC-8)]

This looks like bug 1542381. You might want to set ui.mouse.radius.enabled=true (provided by kats in bug 1542381 comment 1) as a workaround and see if it helps.