How do I manage Firefox fullscreen permissions on HTML5 videos?
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?
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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
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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":
Neither option works, unfortunately. Have already tried clearing cookies before resorting to the forum.
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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
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