Gecko/Touch

Status in Gecko

This table summarizes some of the broad features related to touch input on the web, and their implementation status on different Gecko platforms:

Platform	Touch Events	Pointer Events (bug 960316)	touch-action	async pan/zoom	mobile viewport
Android	yes	no	no (bug 1029631)	Java (bug 776030)	Java (bug 799585)
Firefox OS	yes	no	no (bug 960209)	Gecko APZC	Gecko
Linux	no	mouse only (disabled)	no	disabled (bug 1013364)	no
Mac	no	mouse only (disabled)	no	disabled (bug 1013364)	no
Windows desktop	disabled (bug win-touch-issues)	mouse only (disabled)	no (bug 1001440)	disabled (bug 1013364)	no
Windows metro	yes	yes (disabled)	yes	Gecko APZC	Gecko

This table lists support by other browsers as of December 2014:

Browser	Touch Events	Pointer Events	touch-action
Chrome	✓		✓
IE desktop		✓	✓
IE mobile	✓	✓	✓
Safari	✓

Standards:

W3C Touch Events (shipped by Safari, Chrome, IE Mobile, Firefox for Android, Firefox OS)
W3C Pointer Events (shipped by IE Desktop, IE Mobile)
- touch-action is part of the Pointer Events spec (shipped by Chrome, IE Desktop, IE Mobile)

Current work:

Windows desktop, Mac, Linux: Use async pan/zoom.
- Status: disabled, can be tested in nightly builds with pref: layers.async-pan-zoom.enabled
- Tracking bug
Windows desktop: Fix and enable Touch Events, and implement Pointer Events + touch-action (depends on APZ).
- Status: disabled, can be tested in nightly builds with prefs:
  - dom.w3c_pointer_events.enabled
  - dom.w3c_touch_events.enabled
  - layout.css.touch_action.enabled
- Tracking bug

Possible future work:

Linux desktop: Add support for touch events, pointer events, touch-action.
Firefox OS: Implement and enable pointer events and/or touch-action.
Android: Unify Android and Gecko APZC and viewport code.
Android: Implement Pointer Events and/or touch-action.
Layout: Implement CSS Device Adaptation to rationalize mobile viewport code (bug 747754).