1403701 - Youtube Fullscreen Video has Transparent bar where Dock is

Status: RESOLVED DUPLICATE of bug 1390125

(Firefox :: Untriaged, defect)

Description

[maxcfost]

Attachment: A screenshot of the issue

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36

Steps to reproduce:

On Firefox Nightly 58 or 57 on macOS 10.13, open a YouTube video and click the YouTube fullscreen button. This does not occur when the browser window is in native fullscreen when the YouTube fullscreen button is pressed.


Actual results:

A bar of the desktop background is shown on the left side. A screenshot is attached.


Expected results:

The video should function normally, as in Chrome.