1396572 - The animation video from the background stops when zooming in.

Status: NEW

(Core :: Layout, defect, P3)

Description

[Valentina Claudia Ona]

Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0
Build ID:  20170831165232

[Affected versions]: Firefox  56.0b8

[Affected platforms]:
Windows 10 x 64 Surface Pro 4, Ubuntu 16.04 x64, Mac OS X 10.12

[Steps to reproduce]:
1.Launch Firefox 56.0b8 with a new profile 
2.Go to www.vimeo.com
3.Zoom in the page until 240% or more.

[Expected result]:
The animation video from the background continues to run.

[Actual result]:
The animation video from the background is stopped.

[Notes]:
1.The issue is reproducible on Mac OS X 10.12 but only at zoom level 300%(normal  and full screen mode too).
2.On Ubuntu 16.04 but at the zoom in 240% or more(only in normal mode).

Comment 1

[Milan Sreckovic [:milan] (needinfo for best results)]

Do we know if this is a regression from 55?

Comment 2

[Botond Ballo [:botond] [back on May 21]]

I cannot reproduce this on Debian with the latest m-c. The animation video does pause briefly while the page repaints at the higher zoom level, but then continues playing.

In any case, since this concerns full-zoom it's not an APZ issue.

Comment 3

[roxleitan]

Tested on Ubuntu 16.04 x64 and could not reproduce it on Beta 56.0b9.

Reproducible on Beta 50.0b9 and Beta 56.0b9 on Mac OS x 10.12. (please note that is reproducible only with ski video)