1425481 - when in youtube video in fullscreen move and move back browser stays in fullscreen mode but scrollbars are missing

Status: UNCONFIRMED

(Core :: DOM: Core & HTML, defect, P3)

Description

[pquiring]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36

Steps to reproduce:

go to youtube.com
play a video
make video fullscreen by click on [ ] full screen button in video
move back to prev webpage using ALT + LEFT_ARROW
youtube is still in fullscreen mode but can't scroll (no scrollbars)



Actual results:

after procedure youtube is left in corrupt fullscreen mode
(this happens in Chrome too which is odd)
(Edge just shows an empty page - really bad bug there)
(IE11 exits fullscreen mode - only browser that works -- VERY odd)


Expected results:

exit fullscreen mode or show scrollbars if you choose to make Firefox remain in fullscreen mode.

Comment 1

[traitor57]

I confirm this, going back in history after fullscreening a youtube video causes tab and address bar to disappear, disables scrolling.

Comment 2

[Adam Stevenson [:adamopenweb]]

I can reproduce this in Firefox 59 for OSX, but it also happens in Chrome.

Comment 3

[Ralph Giles (:rillian)]

I can reproduce in Firefox Nightly 60 on Linux, so it's a general issue. If it happens in Chrome it may be a site issue. It's not just the missing scrollbars; scrolling with the mouse wheel doesn't work either.

Redirecting to Pan/Zoom in case there's a spec implementation issue here.

Comment 4

[Botond Ballo [:botond]]

The issue hapens with APZ disabled as well.

Note also that exiting fullscreen mode via F11 resolves the issue.

I'm not really sure what is the appropriate component for issues related to fullscreen mode, but I'm going to guess DOM.