1250420 - Mousewheel scrolling with "alt" key modifier is broken with APZ enabled

Status: UNCONFIRMED

(Core :: Panning and Zooming, defect, P3)

Description

[avada]

I have these settings:

general.smoothScroll.mouseWheel.durationMaxMS;1500
mousewheel.default.delta_multiplier_x;150
mousewheel.default.delta_multiplier_y;150
mousewheel.with_alt.delta_multiplier_x;300
mousewheel.with_alt.delta_multiplier_y;300
mousewheel.withcontrolkey.action;3

When I scroll continously with the alt key pressed the scrolling either starts fast then slows down to a crawl, or its slow from the get go.
Normal scrolling doesn't seem to be affected. Setting the same values for mousewheel.default.* will result in the expected faster scrolling.

Comment 1

[Kartikaya Gupta (email:[e-mail])]

I can reproduce a difference in scroll distance between APZ and non-APZ scrolling with these prefs. However I'm not seeing the "slow down to a crawl" issue - at least not more so in APZ than non-APZ.