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

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

How do I manage Firefox fullscreen permissions on HTML5 videos?

  • 3 fhreagra
  • 3 leis an bhfadhb seo
  • 55240 views
  • Freagra is déanaí ó cor-el

more options

I accidentally set youtube's HTML5 player to disable full screen - how do I re-enable it or manage my permissions for HTML 5 full screen video?

Réiteach roghnaithe

That appears to be stored as a permission.

You can open the about:permissions page via the location bar and select www.youtube.com in the left pane.
You will notice a full screen select with three choices and with Block currently selected.
You can set it to Allow or to Always Ask as you like.

Also accessible via Tools > Page Info > Permissions


Read this answer in context 👍 3

All Replies (3)

more options

Try to clear the YouTube cookies

  • Tools > Options > Privacy > Cookies: "Show Cookies"

YouTube may also be using local storage to store data.

I have this 'cookie' in local storage to set the volume level:

yt-player-volume: {"volume":100,"nonNormalized":null,"muted":false}

You can delete the webappsstore.sqlite file in the Firefox Profile Folder to clear all data in local (DOM) storage.

See also "Storage location and clearing the data":

more options

Neither option works, unfortunately. Have already tried clearing cookies before resorting to the forum.

more options

Réiteach Roghnaithe

That appears to be stored as a permission.

You can open the about:permissions page via the location bar and select www.youtube.com in the left pane.
You will notice a full screen select with three choices and with Block currently selected.
You can set it to Allow or to Always Ask as you like.

Also accessible via Tools > Page Info > Permissions


Athraithe ag cor-el ar