BTW I've since changed my mind on this. Setting the proposed environment variable makes toupad scrolling mysteriously slow down after a notification arrives until you switch focus away from Firefox and back (See https://bugzilla.mozilla.org/show_bug.cgi?id=1182700). This problem is particularly severe for mouse scroll wheel users, where wheel scrolling breaks entirely until you switch away and back again.
I grudgingly live with the issue when I'm using a touchpad, but I unset the envar when I'm using a mouse because of how bad it is. I think https://bugzilla.mozilla.org/show_bug.cgi?id=1182700 needs to be fixed upstream before this can be considered. Unfortunately, it's blocked on a GTK issue (https://gitlab.gnome.org/GNOME/gtk/issues/558) that the GTK developers have declared unfixable on X11. ** Bug watch added: gitlab.gnome.org/GNOME/gtk/issues #558 https://gitlab.gnome.org/GNOME/gtk/issues/558 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1697122 Title: Package Firefox with MOZ_USE_XINPUT2=1 in environment to enable pixel scrolling with touchpad and touch gestures Status in firefox package in Ubuntu: Confirmed Bug description: Ubuntu version: Kubuntu 17.04 Firefox version: 53.0.3+build1-0ubuntu0.17.04.2 In Firefox, two-finger scroll gestures on a touchpad are interpreted as scroll wheel rotations, and the content scrolls three lines at a time. This is inappropriate behavior for touchpad scrolling; it should scroll pixel-by-pixel. Firefox already has the ability to do this, you just need to turn it on by running the program with MOZ_USE_XINPUT2=1 in the environment: for example, by running `MOZ_USE_XINPUT2=1 firefox`, or adding it to /etc/environment or something like that. Turning on this behavior yields a large usability improvement for laptop users. Therefore, I am proposing that MOZ_USE_XINPUT2=1 be permanently added to the packaging such that it's always present when Firefox runs. This is what Fedora does, and it results in a much improved experience for the laptop user. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1697122/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
