1464925 - Visual glitch: graphic layers around menu displaced, linked to scroll position.

Status: NEW

(Core :: Graphics, defect, P3)

Description

[Karl Dubost💡 :karlcow]

This is a spinoff of https://webcompat.com/issues/17016


- visit https://coolbackgrounds.io/
- open the ▲ menu (scroll down if out of the viewport)
- scroll down more

Video: https://imgur.com/a/T7qqXfH

Notes:  150%  DPI factor, Intel graphic
OK in current stable Fx.
https://webcompat.com/uploads/2018/5/f258ba50-0980-4568-94b2-d3b43c943fcb.jpg

<details>
<summary>Browser Configuration</summary>
<ul>
  <li>mixed active content blocked: false</li><li>buildID: 20180525005138</li><li>tracking content blocked: false</li><li>gfx.webrender.blob-images: true</li><li>gfx.webrender.all: false</li><li>mixed passive content blocked: false</li><li>gfx.webrender.enabled: false</li><li>image.mem.shared: true</li><li>channel: nightly</li>
</ul>
</details>


More testing and details on https://webcompat.com/issues/17016

Not happening in Chrome
Happening only with scroll
more acute with scrollbar
reproducible with 100% dpi.

Comment 1

[Emilio Cobos Álvarez (:emilio)]

Cannot repro on linux with or without WR enabled, but from the description looks way more like a Graphics bug.

Comment 2

[Michal Čaplygin [:myf]]

For record, on WIN 10 Dell Latitude with Intel I5 (corresponding HD graphic card, latest drivers) I'm getting those glitches in current stable Fx (60.0.1), Developer Edition (61.0b9 (64-bit)), Nightly 62.0a1 (2018-05-30) (64-bit), even small glitches in Waterfox 56.2.0 (64-bit). No glitches in Pale Moon  27.9.2 (64-bit).

Comment 3

[Michal Čaplygin [:myf]]

Issue still persists in Nightly with "Direct3D 11 (Advanced Layers)" Compositing (default).
Issue is not present in Nightly with "WebRender" Compositing (forced with pref atm).

Comment 4

[Firefox Bug Husbandry Bot]

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

Comment 5

[Firefox Bug Husbandry Bot]

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