UltraWideo
Remove black bars and zoom any video to fill your screen — Netflix, YouTube & every site. Any monitor. Free forever.
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한국인Overview
Features & Capabilities
User Growth & Download Statistics
Manifest V2 Add-on
- By:
- nnx0r
- Daily users:
- 15,041 -47
- Rating:
- 4.43 (228)
0.02 - Version:
- 4.0.9 Last updated: 2026-07-23
- Version code:
- 6360419
- Creation date:
- 2018-07-21
- Risk:
- High risk impact Moderate risk likelihood
- Permissions:
- alarms
- tabs
- webNavigation
- https://uw.wtf/*
- https://uw.devilos.org/*
- alarms
- Content scripts matches:
- *
- uw.wtf
- *
- Size:
- 395.85KB
- Email:
- co*****@uw.wtf
- URLs:
- Website ,Privacy policy
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-07-30
- Compare stats and ranking:
- UltraWideo vs Ultrawider — 21:9 Video Fill
- UltraWideo vs Ultrawide Video – Zoom Fill & Remove Black Bars
- UltraWideo vs Ultrawidify
Contact the developer
Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Publisher Change History
2026-06-08: n.*****@gmail.com to co*****@uw.wtf
Upgrade to see full email
Permission Change History
2026-07-24: Version 3.5.9 → 4.0.9
Add Permissions: webNavigation https://uw.wtf/* https://uw.devilos.org/*
Remove Permissions: storage https://*/* http://*/*
2024-05-13: Version 3.1.0 → 3.2.0
Add Permissions: alarms tabs
2024-01-30: Version 3.0.4 → 3.0.7
Remove Host permissions: https://*/* http://*/*
Add Permissions: https://*/* http://*/*
2024-01-15: Version 2.5.6 → 3.0.4
Add Host permissions: https://*/* http://*/*
User Reviews
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.
Recent reviews
Newest update broke the extension entirely.
by Fi*****, 2026-07-26
New update broke it for me., Installed new update stopped working completely, checked the preferences, still would not work, went back to previous version worked straight away.
by He*****, 2026-07-25
Is UltraWideo Safe?
Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.
UltraWideo requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk impact analysis details
- Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
- High ****** ********* ** * ****** ******** ******** ********** * ******* ******* *****
- High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
- Low ******* ****** ** *** ********* ******** ******* ***********
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.
UltraWideo is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.
Risk likelihood analysis details
- High This extension has recently changed publisher email (might be a transfer in ownership)
- High **** ********* *** ******** ******* ** *** **** ****** *** ******* *** *** ** ****** ** *****
- Medium **** ********* *** ****** **** ****** ********* ********** *** *** ** ****** ** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
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