Immersive Fullscreen

Fills your entire screen in YouTube fullscreen mode. No black bars, just the video.

Immersive Fullscreen makes YouTube videos fill your entire display when you go fullscreen. No black bars on the sides, no wasted pixels. Just the video, edge to edge. Perfect for ultrawide monitors, tall screens, or any display whose aspect ratio doesn’t match the video. FEATURES Automatic: works the moment you enter fullscreen, no setup needed Edge-to-edge video: fills your entire screen, eliminating black bars Floating toggle: a discreet on-screen button lets you switch the effect on or off without leaving fullscreen Restores instantly: the original layout comes back as soon as you exit fullscreen Lightweight: a single small script, no frameworks, no bloat HOW TO USE Install the extension Open any video on YouTube Press F or click the fullscreen button Enjoy the video filling your whole screen PRIVACY Immersive Fullscreen does not collect, store, or transmit any data. It runs entirely on your browser, only on youtube.com, and makes no network requests. The source code is minimal and fully inspectable.