# Window Fullscreen for YouTube

> Watch YouTube in true windowed fullscreen — fill your browser window without going OS-level fullscreen. Free and open source.

Canonical page: [https://chrome-stats.com/d/window-fullscreen-for-youtube](https://chrome-stats.com/d/window-fullscreen-for-youtube)

## Overview

- **ID:** `window-fullscreen-for-youtube`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Dor Zairi
- **Category:** photos-music-videos
- **Daily users:** 68
- **Weekly downloads:** 14
- **Rating:** 5.00 / 5 (2 ratings)
- **Version:** 0.4.1
- **Last updated:** 2026-09-03
- **First published:** 2026-05-22
- **Size:** 38 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/window-fullscreen-for-youtube/)
- **Website:** [https://github.com/MashdorDev/window-fullscreen-for-youtube/issues](https://github.com/MashdorDev/window-fullscreen-for-youtube/issues)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/window-fullscreen-for-youtube/privacy/](https://addons.mozilla.org/firefox/addon/window-fullscreen-for-youtube/privacy/)

## Description

<strong>Window Fullscreen for YouTube</strong> gives YouTube a real windowed-fullscreen mode. The player fills your browser window without going OS-level fullscreen — perfect for ultrawide monitors, dual-screen setups, or anyone who wants a bigger player while keeping the rest of the browser usable.

<strong>Features</strong>
<ul><li><strong>Native player button</strong> right next to YouTube's own fullscreen icon — not a toolbar popup, not a floating widget</li><li><strong>Configurable hotkey</strong> (default Shift+F), Esc to exit</li><li><strong>Auto-toggle on new videos</strong> (optional)</li><li><strong>Scrollable mode</strong> — keep the player large and still reach comments below</li><li><strong>Hover-to-reveal masthead</strong> so the search bar is always one mouse-flick away</li><li><strong>Live chat side-panel</strong> with a draggable resize handle — choose sticky chat (pinned to right) or scroll-with-the-page</li><li><strong>Granular hide controls</strong> for masthead, sidebar, comments</li><li><strong>Native YouTube integration</strong> — three settings live inside YouTube's gear menu, styled to match</li></ul>
<strong>Why free?</strong>

The most popular extension for windowed-fullscreen moved its core features behind a paywall, and the community wasn't happy. This extension ships every previously-paid feature free, source available for inspection.

No paywall. No subscription. No nag prompts. Open source under MIT.

<strong>Privacy</strong>

This extension only accesses <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/577585700e711c66b2f847e9c2ba66f07706960fe129e88008d23cb2a93a014c/http%3A//youtube.com" rel="nofollow">youtube.com</a>. It stores settings in your browser's sync storage. It does <strong>not</strong> collect, transmit, or sell any data.

<strong>Source code</strong>

<a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/857ff9eb44fc62c68ffcfc167fe0c7797912531571854b16d5a516903140a050/https%3A//github.com/MashdorDev/window-fullscreen-for-youtube" rel="nofollow">Github Repo</a>

## Rankings

- #13,893 — Overall
- #148 — windows
- #156 — screen time
- #163 — screensaver
- #181 — screen
- #227 — pull

## Permissions and access

### Permissions

- `storage`

### Host permissions

- `*://www.youtube.com/*`

### Content script matches

- `www.youtube.com`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Request access to the following domains: youtube.com
- This extension was recently updated in the past month. New updates may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [YouTube Dynamic Web Fullscreen](https://chrome-stats.com/d/youtube-dynamic-web-fullscreen) — 9 users
- [YouTube Windowed FullScreen](https://chrome-stats.com/d/youtube-window-fullscreen) — 4,151 users, 3.63 / 5
- [YouTube Window Fullscreen](https://chrome-stats.com/d/yt-window-fullscreen) — 10 users, 5.00 / 5
- [YouTube Tab-Fullscreen](https://chrome-stats.com/d/youtube-tab-fullscreen) — 18 users, 5.00 / 5
- [YouTube Fullscreen Theater Mode](https://chrome-stats.com/d/yt-fullscreen-theater-mode) — 66 users, 5.00 / 5
- [YouTube Full Windowed](https://chrome-stats.com/d/youtube-full-windowed) — 313 users, 4.50 / 5
- [YouTube Ultrawide Pan & Zoom](https://chrome-stats.com/d/youtube-ultrawide-pan) — 32 users, 5.00 / 5
- [YouTube Browser Fullscreen](https://chrome-stats.com/d/browser-fullscreen) — 1 users
- [Pop-out Youtube](https://chrome-stats.com/d/youtube-pop-out) — 316 users, 3.18 / 5
- [Windowed - floating Youtube/every website](https://chrome-stats.com/d/windowed) — 3,780 users, 4.36 / 5
- [YouFull](https://chrome-stats.com/d/youfull) — 4.00 / 5
- [Anywhere Player for YouTube™](https://chrome-stats.com/d/youtube-anywhere) — 20 users, 1.00 / 5

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Source: [Chrome-Stats](https://chrome-stats.com/d/window-fullscreen-for-youtube)