1713291 - [Proton] Pages shift vertically as well when performing horizontal scroll only

Status: RESOLVED DUPLICATE of bug 1712874

(Core :: Panning and Zooming, defect)

Description

[Andrei Purice]

Affected Versions:
Nightly 90.0a1

Tested On:
MacOS 10.14, 10.15, M1 Macbook Big Sur

Steps to Reproduce:

1. Go to any sites that is scrollable, ex: facebook, reddit, etc
2. Perform a simple horizontal (only) scroll
3. Watch over the elastic animation

Expected Results:
The page is steady and the elastic overscroll effect is triggered only horizontally.

Actual Result:
The page shifts up and down as well instead of only horizontally.

Note:
This issue is more visible when using a touchpad. When using a magic mouse it's more kept in line.

Video:
Link : https://drive.google.com/file/d/1CCps75jj2n8V0yyZ38tUic63Ae68R9Mo/view?usp=sharing

Severity:
Marked it with S2 since the issue is present on any site.

Comment 1

[Botond Ballo [:botond]]

Following user feedback and multiple regression reports, we are going to back out bug 1704080 for now. The backout is happening in bug 1712874.

Comment 2

[Andrei Purice]

Can confirm that after the backout done in Bug 1712874, this is no longer reproducible on the latest Nightly 91.0a1 nor Beta 90.0b4, thus marking it as verified for Fx90.