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I'm running Ubuntu 14.04, Mozilla Firefox 29.0 for Ubuntu Canonical 1.0.

After installation I've watched some YouTube videos and clicked fullscreen, and the popup 'allow full screen?' appeared. By misclick I've clicked 'Don't allow' and 'never ask again'.

Where is this information stored? How can I reverse it? It's very annoying since I can't view embedded YouTube videos in fullscreen until I repair it.

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1 Answer 1

up vote 11 down vote accepted

If you were using YouTube's HTML 5 player (as the "never ask again" in the popup suggests), the fullscreen setting is managed by Firefox (and therefore has nothing to do with Ubuntu or Gnome).

Go to about:permissions (just copy it into your address bar), select www.youtube.com from the list and change the setting in the Fullscreen box.

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Thanks, I'll try it as soon as I get home –  fetta May 12 '14 at 8:25
still works, great, thx. –  mondjunge Jun 25 at 14:37

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