Ubuntu – How to get Firefox to recognize multitouch gestures on a touch screen


Multitouch seems to be working fine on Chromium out of the box, but not on Firefox. On Chromium, dragging a finger up or down the screen scrolls the screen as expected, but on Firefox, that gesture seems to be highlighting text. How can I get Firefox to play nice with multitouch gestures?

I'm running Ubuntu 14.04 on a Lenovo Yoga 2 11" convertible laptop.

Edit: I read the page here which says that touch capability is present but disabled in FF. But enabling them and restarting doesn't seem to have any effect–dragging one's finger across the screen still only selects text.

Best Answer

On Xubuntu 16.04 with Firefox 50, I got it working by enabling e10s and setting the env-var MOZ_USE_XINPUT2=1. In detail:

  1. Enable e10s/Multiprocess. If you're running Firefox 57 or higher, it should be enabled already. Otherwise, you may have to disable a bunch of addons, and possibly force enable it.

    • Use https://addons.mozilla.org/en-US/firefox/addon/add-on-compatibility-reporter/ to check which addons are incompatible with e10s, although simply having only-marked-as-compatible addons is not enough in FF50 to get e10s switched on, you may have to force-enable it anyway (in FF50, only certain whitelisted addons are allowed with e10s by default – later versions will enable e10s as long as all addons are compatible).
    • You can check in about:support if Multiprocess is on. If you need to force-enable, just open about:config, right-click and enter a new boolean value with the name browser.tabs.remote.force-enable; then restart FF and check about:support again.
  2. Exit FF, and start it from the command-line with MOZ_USE_XINPUT2=1 /usr/bin/firefox.

Now you can test https://www.paulirish.com/demo/multi and scroll with one finger.

Source: https://support.mozilla.org/en-US/questions/1091627

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