Click to go fullscreen (+ HD); click again to exit fullscreen.
YouTube Toggle Fullscreen Extension
Adds an extension button that expands YouTube videos to the full window and activates HD quality (optional, see options page).
The functionality can also be activated with a keyboard shortcut (see options page).
The extension is efficient, does not require unnecessary permissions and works directly on YouTube with minimal changes (so no surprises!).
Source Manifest.json
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User reviews
Disciple de Jésus-Christ (ID: 0000005493478680) Voted 3 ★ - Updated 06/20/2019
G T (ID: 00000015ef5af822) Voted 5 ★ - Updated 09/25/2016
Mike Blackbird #2 (ID: 0000000723f7993b) Voted 5 ★ - Updated 06/27/2016
Benoît Quenaudon (ID: 0000004eebba7107) Voted 5 ★ - Updated 06/25/2016