1713931 - Box shadow isn't rendering properly on Firefox for Android

Status: NEW

(Core :: Graphics, defect, P3)

Description

[Kevin Brosnan [Ex-Mozilla]]

From github: https://github.com/mozilla-mobile/fenix/issues/19724.

Steps to reproduce

Any boxshadow, when moving or even still
https://pcxx-9eeb0.web.app/

Expected behavior

Chrome properly opera webview all except firefox

Actual behavior

Flickering and weird behaviour newest firefox 88

Device information

Mi 9 lite

Change performed by the Move to Bugzilla add-on.

Comment 1

[Kevin Brosnan [Ex-Mozilla]]

Now I tested on Firefox Beta & Nightly, same issue, not only on this site, on other sites as well, when box-shadow is moving...
Chrome Mobile✓ Mi 9 Lite
Opera Mobile✓ Mi 9 Lite
Safari Mobile✓ iPhone, MacOS✓
Firefox on Windows ✓
Chrome Mobile ✓ Samsung SM-500
Firefox Beta & Nightly & Focus ✗ => Same Issue ✗ Mi 9 Lite ✗
Firefox Mobile > Samsung Sm 500 ✓ Works

Mi 9 Lite:

• Firefox Lite 2.1.12(19131) > Mi 9 Lite ✓ Actually works
• Firefox Beta 68.7 -> Mi 9 Lite Works
• Firefox 80 -> Mi 9 Lite > doesn't work ✗
• Firefox Beta 75.0.0-beta.6 -> Works ✓
• Firefox Beta 78.0.1-beta.1 -> Works ✓
• Firefox 79.0.5 -> Works ✓

It seems the breaking point is between Firefox 79 and 80

Comment 2

[Sotaro Ikeda [:sotaro]]

(In reply to Kevin Brosnan [:kbrosnan] from comment #0)

Device information

Mi 9 lite

https://www.gsmarena.com/xiaomi_mi_9_lite-9862.php

Comment 3

[Sotaro Ikeda [:sotaro]]

I could not reproduce the problem on Pixel3a(Adreno 615). The problem seems device specific.

Comment 4

[Sotaro Ikeda [:sotaro]]

:jnicol, is it a known problem?

Comment 5

[Jamie Nicol [:jnicol] out of office until 6th Jan]

Not a known problem, no. I cannot reproduce on my Adreno 650, so yes I agree this is likely device specific.

I have asked the reporter on github if they can use mozregression, as they said it started with version 80.