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.
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.