# UltraWideo

> Remove black bars and zoom any video to fill your screen — Netflix, YouTube & every site. Any monitor. Free forever.

Canonical page: [https://chrome-stats.com/d/ultrawideo](https://chrome-stats.com/d/ultrawideo)

## Overview

- **ID:** `ultrawideo`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Devilos LLC
- **Category:** appearance,photos-music-videos
- **Daily users:** 15,299
- **Weekly downloads:** 470
- **Rating:** 4.38 / 5 (237 ratings)
- **Version:** 4.2.0
- **Last updated:** 2026-09-08
- **First published:** 2018-07-21
- **Size:** 344 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/ultrawideo/)
- **Website:** [https://uw.wtf](https://uw.wtf/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/ultrawideo/privacy/](https://addons.mozilla.org/firefox/addon/ultrawideo/privacy/)

## Description

**UltraWideo** removes black bars and lets you zoom any online video to fill your display, whether you use an ultrawide monitor, 16:9 screen, TV, or watch older 4:3 content. It works across Netflix, YouTube, and other video sites in both fullscreen and inline modes, with automatic video detection—even for small or nested players.

Choose from Normal, Upscale to fill, Stretch to fit, and Custom zoom modes. Fine-tune the frame with scale and pan controls, gestures, and customizable keyboard shortcuts. UltraWideo also offers light and dark themes, accent colors, auto-hiding controls, reduced motion, and support for 40+ languages. Optional Pro features include per-site and per-video settings, letterbox detection, ambient light, adaptive sharpening, voice control, cloud sync, and a customizable mode manager.

## Rankings

- #600 — Overall
- #89 — Appearance
- #89 — Photos, Music & Videos
- #23 — widget
- #73 — laptop
- #99 — zoom

## Permissions and access

### Permissions

- `alarms`
- `tabs`
- `webNavigation`
- `https://uw.wtf/*`
- `https://uw.devilos.org/*`

### Content script matches

- `*`
- `uw.wtf`

## Safety

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

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- 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).

## Review summary

UltraWideo is praised for removing ultrawide letterboxing by stretching videos to fill the screen across many sites, improving viewing on widescreen monitors. It also has a nicer UI and broad cross-site support. Common concerns center on a free-version watermark, subtitle display issues in fullscreen on some services, and paid features behind a subscription (often requiring a GitHub account) without a clear trial. Occasional cropping or plugin-specific fullscreen glitches are also reported.

### Pros

- Removes black bars on ultrawide displays by stretching videos to fill the screen across many sites.
- UI is nicer and easier to use than some alternatives.
- Works across a broad range of sites (YouTube, VK, Disney+, etc.) and enables true fullscreen aspect ratios.
- Helpful for widescreen content (anime, etc.) and supports stretch mode for the best fit.

### Cons

- Watermark in the free version, which many users find immersion-breaking or distracting.
- Subtitles do not display or are misaligned when stretched or in fullscreen on some streaming sites (Disney+, Apple TV+, etc.).
- Premium features are gated behind a paid subscription and may require a GitHub account, with little or no way to trial features before paying.
- Fullscreen/viewport issues on certain sites (some videos crop or appear as half-screen; Plex fullscreen problems).
- Hotkeys can be unreliable.

## Similar extensions and apps

- [Ultrawider — 21:9 Video Fill](https://chrome-stats.com/d/ultrawider-21-9-video-fill) — 1 users
- [Ultrawide Video – Zoom Fill & Remove Black Bars](https://chrome-stats.com/d/ultrawide-video-zoom-fill) — 5 users, 5.00 / 5
- [Ultrawidify](https://chrome-stats.com/d/ultrawidify) — 6,974 users, 4.15 / 5
- [Universal Video Maximizer](https://chrome-stats.com/d/universal-video-maximizer) — 435 users, 5.00 / 5
- [Video Plus](https://chrome-stats.com/d/video-plus) — 82 users, 3.90 / 5
- [Video Aspect Ratio Resizer 🎥](https://chrome-stats.com/d/video-aspect-ratio-resizer) — 277 users, 3.33 / 5
- [Ultrawidey](https://chrome-stats.com/d/ultrawidey) — 165 users, 3.67 / 5
- [Ultrafill — Zoom Video to Fill](https://chrome-stats.com/d/ultrafill-zoom-video-to-fill) — 86 users, 4.67 / 5
- [Zoom to Fill](https://chrome-stats.com/d/zoom-to-fill) — 769 users, 4.33 / 5
- [YouTube Dynamic Web Fullscreen](https://chrome-stats.com/d/youtube-dynamic-web-fullscreen) — 9 users
- [SuperWideZoom](https://chrome-stats.com/d/super-wide-zoom) — 63 users, 3.50 / 5
- [Big Video](https://chrome-stats.com/d/big-video) — 1 users

---

Source: [Chrome-Stats](https://chrome-stats.com/d/ultrawideo)