[Bug 1228250]

[Masayuki]

I realized that due to e10s mochitests disabled, we won't test the
default actions of wheel events without APZ. I manually ran the test
without non-e10s mochitests.  Then, I confirmed that it's all green.

On the other hand, there is a known bug in the patch. The multiplier
pref for X axis is applied to deltaY if the wheel event should be
treated as horizontal scroll.  So, WheelEvent.deltaY may see odd delta
value with it especially when the multiplier X is negative (meaning
scroll direction is reversed) but multiplier Y is positive. With more
complicated code, I can fix it, but I don't know if it's enough
worthwhile...

-- 
You received this bug notification because you are a member of Mozilla
Bugs, which is subscribed to Mozilla Firefox.
https://bugs.launchpad.net/bugs/1228250

Title:
  [Shift + Mouse-Scroll-Wheel] Does NOT Scroll Horizontally

To manage notifications about this bug go to:
https://bugs.launchpad.net/firefox/+bug/1228250/+subscriptions