1383945 - Scrolling on a specific site causes vertical distortion

Status: UNCONFIRMED

(Core :: Graphics, defect, P5)

Description

[angus]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0
Build ID: 20170630112252

Steps to reproduce:

- Use Firefox 54.0.1 on Archlinux (4.11.9-1-ARCH) with Zotero enabled (can't seem to reproduce with it disabled)

- Visit https://blog.marai.me/2017/07/24/18-year-old-arrested-bkk-tsystems-e-ticket/ (or a locally saved copy)

- Scroll (scroll wheel, arrow keys, spacebar, etc.)



Actual results:

The top of the page moves up, but the bottom of the page remains pinned where it was. This causes all the page content to stretch vertically, until it suddenly "snaps" to the next screenful of content.

Video here: https://gfycat.com/HandyRapidJabiru (my experience) and https://gfycat.com/ApprehensiveRepulsiveComet (from a user on reddit, not sure of their Firefox/addon configuration)



Expected results:

The page should have scrolled as normal.

Comment 1

[Michael Leu[:Lenzak](UTC+8)]

Hi angus

Could you please attach the about:support page?

I cannot reproduce it on Ubuntu 16.04, so maybe this problem only happen on specific hardware or Linux distribution.

Comment 2

[angus]

Attachment: about:support

I didn't realise that starting in safe mode wouldn't reset about:config changes, I noticed that I have layers.acceleration.force-enabled = true -- I don't seem to be able reproduce the bug with this set to false either.