1497375 - Page repeatedly jumping toward the end of the page when scrolling

Status: RESOLVED INVALID

(Core :: General, defect, P3)

Description

[Karl Dubost💡 :karlcow]

This is a spinoff of https://webcompat.com/issues/19332
I'm not sure if it's DOM related or painting.


Here the description.
    1. Navigate to https://newint.org/features/2014/03/01/middle-east-personal-politics/ 
    2. Scroll down toward the end of the page.
    3. Reach the section "3 ways to support us"
    4. Scroll slowly.
        
**Expected Behavior:**
Page has a smooth scrolling like in Edge and Chrome.

**Actual Behavior:**
The page jumps up and down. Once at the bottom, “Social media” icons are no longer fully visible and jump back a bit.

**Note:**
    1. Reproducible on Firefox Release 62.0.2 and Nightly 64. 
    2. Not reproducible on Chrome 69.0.3497.100, Edge 42.0.0.2549.
    3. Screenshot attached.
    4. Affected area:


See the animated GIF 
https://user-images.githubusercontent.com/12184325/46335490-51ecbf80-c630-11e8-83ac-542ef5d5b80d.gif

Comment 1

[Karl Dubost💡 :karlcow]

https://perfht.ml/2ILafUS

Comment 2

[Olli Pettay [:smaug][[e-mail]]]

I don't see anything performance related here. Removing qf.

Comment 3

[Firefox Bug Husbandry Bot]

Migrating Webcompat whiteboard priorities to project flags. See bug 1547409.

Comment 4

[Firefox Bug Husbandry Bot]

See bug 1547409. Migrating whiteboard priority tags to program flags.

Comment 5

[Mike Taylor [:miketaylr]]

It seems like the site has been redesigned, there's no longer a "3 ways to support us" section of the page.