Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

The fullscreen button on Youtube videos will not work.

  • 8 replies
  • 4 have this problem
  • 13 views
  • Last reply by portie

more options

For some reason the full screen button on Youtube videos not on the Youtube site will not work. A pop up message appears, but the information that is linked is outdated. It references the about permissions page which was removed.

For some reason the full screen button on Youtube videos not on the Youtube site will not work. A pop up message appears, but the information that is linked is outdated. It references the about permissions page which was removed.

Modified by user1345387

All Replies (8)

more options

The about:permissions page is gone, but "permissions" is still in Firefox, reached via Page Info for the page that is being viewed.

https://support.mozilla.org/en-US/kb/page-info-window-view-technical-details-about-page#w_permissions

more options

I know, but I do not see an option for full screen.

P.S. Let me make it very clear that on Youtube the full screen button works fine, but not on other sites.

Also this just started yesterday.

Modified by user1345387

more options

The full screen permission has been removed from "Tools > Page Info" and has been replaced by the full screen API that displays a notification to make you aware of the switch to full screen mode.

Do you mean that the full screen button doesn't work with embedded Yahoo videos on other Web Developer.

It is possible that the video is embedded in an iframe and that the outermost iframe is missing the allowfullscreen="true" attribute that Firefox needs. You can set dom.event.contextmenu.enabled to false as a workaround. Then you have a Full Screen item in the right-click context menu.

more options

Is it possible to post a video here so you can see what I am referring to?

more options

For example I posted (Using the Youtube button in the editor) this video on my forum: https://www.youtube.com/watch?v=CwxGDdsI_bU

[youtube] CwxGDdsI_bU /youtube

When I press the fullscreen button, it does not work. Also it is greyed out.

Modified by user1345387

more options

Exactly I believe my issue is not with Firefox, but with my forum provider.

more options

Can you post a link to that forum page that includes this link?

Then we can check the page code.

See also:

more options

So why can't I use full screen on youtube. This just started. Using the menu does nothing, still won't open in full screen. So how do I fix this?