# YouTube Dynamic Web Fullscreen

> Resize YouTube video to fill browser window while preserving aspect ratio.

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

## Overview

- **ID:** `youtube-dynamic-web-fullscreen`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** DYNAMIC BLINK
- **Category:** appearance,photos-music-videos,tabs
- **Daily users:** 10
- **Weekly downloads:** 1
- **Version:** 1.6
- **Last updated:** 2026-01-21
- **First published:** 2026-01-17
- **Size:** 9.53 KB
- **Data as of:** 2026-09-14
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/youtube-dynamic-web-fullscreen/)

## Description

<strong>Maximize your viewing experience on YouTube with a single click.</strong>

YouTube Dynamic Web Fullscreen allows you to force the video player to fill the entire browser window without entering the traditional full-screen mode. This is perfect for multitasking with "picture-in-picture" style viewing or maximizing screen real estate on ultra-wide monitors.

<strong>Key Features:</strong>
* <strong>True Window Fill:</strong> The video resizes to fit your browser window exactly (100% width and height).
* <strong>Aspect Ratio Safe:</strong> Automatically adds black bars (letterboxing) so the video never stretches or distorts.
* <strong>Distraction Free:</strong> Instantly hides the comments, sidebar, title, and top gradient for a clean, cinema-like view.
* <strong>Smart "Always-On-Top":</strong> Uses advanced layering to ensure the video stays above all other YouTube elements.
* <strong>Zero Data Collection:</strong> This extension runs locally and collects absolutely no user data.

<strong>How to use:</strong>
1.  Open any YouTube video.
2.  Click the extension icon.
3.  The video will expand to fill the window.
4.  Click again to return to normal view.

## Rankings

- #34,074 — Overall
- #189 — resize

## Permissions and access

### Permissions

- `scripting`
- `activeTab`

### Host permissions

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

## Safety

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

### Analysis details

- Request access to the following domains: youtube.com
- This extension has low user count. Unpopular extensions 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

- [Window Fullscreen for YouTube](https://chrome-stats.com/d/window-fullscreen-for-youtube) — 71 users, 5.00 / 5
- [YouTube Window Fullscreen](https://chrome-stats.com/d/yt-window-fullscreen) — 10 users, 5.00 / 5
- [YouTube Windowed FullScreen](https://chrome-stats.com/d/youtube-window-fullscreen) — 4,188 users, 3.63 / 5
- [Large Preview for YT](https://chrome-stats.com/d/large-preview-for-yt) — 1 users
- [YouTube Tab-Fullscreen](https://chrome-stats.com/d/youtube-tab-fullscreen) — 19 users, 5.00 / 5
- [YouTube Fullscreen Theater Mode](https://chrome-stats.com/d/yt-fullscreen-theater-mode) — 67 users, 5.00 / 5
- [YouTube Browser Fullscreen](https://chrome-stats.com/d/browser-fullscreen) — 1 users
- [YouTube Fullscreen Fit](https://chrome-stats.com/d/youtube-fullscreen-fit) — 1,469 users, 4.22 / 5
- [Enhanced Video Filler](https://chrome-stats.com/d/enhanced-video-filler) — 1 users
- [YouFull](https://chrome-stats.com/d/youfull) — 4.00 / 5
- [Pop-out Youtube](https://chrome-stats.com/d/youtube-pop-out) — 321 users, 3.18 / 5
- [Video Aspect Ratio Resizer 🎥](https://chrome-stats.com/d/video-aspect-ratio-resizer) — 280 users, 3.33 / 5

---

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