Chrome Web Store
47Versions
1Code reviewed

No malware found

In code review (v3.5.9)

Our reviewer read version 3.5.9 — the most recent version we have reviewed — and found no malicious behaviour. The version shown here has not been individually reviewed yet.

What our analysis found

UltraWideo, used by 50,000 people, showed no malicious code in Extension Auditor's review. It comes from a trusted publisher and was last updated in September 2026.

Analyst notes

The extension's code is entirely consistent with its stated purpose: adjusting video display across websites. All network requests (license validation, deactivation) go to the publisher's own domain (uw.wtf), which is also the privacy policy URL, and are necessary for the paid license feature. There is no obfuscation, no suspicious third-party communication, and no data exfiltration. The ML model likely overfit on the broad host permissions and the fetch calls to the first-party domain.

UltraWideo

UltraWideo Chrome extension security report

ID: bfbnagnphiehemkdgmmficmjfddgfhpl

Supported Languages

🇨🇳Chinese (Simplified)
🇺🇸English
🇫🇷French
🇩🇪German
🇬🇷Greek
🇮🇹Italian
🇵🇹Portuguese
🇷🇺Russian
🇷🇸Serbian
🇪🇸Spanish

Extension Info & Metadata

Status
Active
Version
4.2.0
Size
0.33 MB
Rating
4.4/5
Reviews
455
Users
50,000
Type
Extension
Updated
Sep 9, 2026
Category
Functionality & ui
Price
Paid
Featured
Yes
Visibility
Listed
Mature
No
By Google
No
Trusted
Yes
This publisherTrack record
4extensions
All still listed
Scanned by Extension Auditor — Low RiskDevelopers: embed this badge to link to this report.

Publisher Contextual Analysis

Trusted
Author
Devilos LLC
MX records exist
Yes
Domain exists
Yes
Is disposable
No
Is role-based
No
Mailbox exists
Yes
Extensions
4
Active
1
Obsolete
0
Listed
4
Unlisted
0
Users
65,933

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Screenshots & videos

Screenshot 2
Screenshot 3
Screenshot 4
Screenshot 5

Install growth

Item
Type
Severity
Description
webNavigation
Permission
High
This permission enables monitoring of all browser navigation events and transitions. Rated High because it can track every page visit, navigation method, and browsing pattern, potentially exposing sensitive browsing behavior and user activities.
tabs
Permission
Medium
This permission enables tab management and monitoring. Rated Medium because it can track open tabs, access tab metadata, and monitor user browsing patterns.
https://uw.wtf/*
Host
Medium
Host permission — access limited to this URL pattern.
https://uw.devilos.org/*
Host
Medium
Host permission — access limited to this URL pattern.
alarms
Permission
Low
This permission schedules periodic tasks. Rated Low because it can only trigger events at specified times without access to sensitive data.

About this extension

The cross-browser extension that manipulates video aspect ratio to fit your entire screen.

Read the publisher’s full description

Introduction Proven to be working on all major video streaming platforms. If it doesn't work for you, it could be a OS related bug. I am using macOS and before I make claims, I thoroughly test it through all major browsers. Features The only extension on the market with functionalities that no other extension in this category possess.
 ▸ Blazingly fast — injection script that manipulates the video is written in plain JavaScript, has tiny footprint and is very fast. ▸ Limitless platforms — not limited to any specific video streaming platform. Aims to work everywhere, including embeddable videos. ▸ Minimal interface — thoughtful design that doesn't get in your way, but provides you with all the necessary options to get the experience you deserve. ▸ Appearance — automatically applies the appearance that you are using as your system preference. If your system is in dark mode, the extension will be too. Can be modified manually as well. ▸ Cross-browser — available for all major browsers and tested on Chrome & Firefox. It works in all Chromium and Gecko based browsers as well. ▸ Internationalization — supports handful of languages, but aiming to support all major languages. ▸ Keyboard shortcuts — customizable within the browser to avoid conflicts with other extensions. ▸ Magic touch — Toggle between the modes with built-in pinch inwards/outwards on touch screens, trackpads with multi-touch gestures and mouse wheel while holding CTRL key. Pro Features By upgrading to UltraWideo Pro, you are supporting future development and unlocking additional features is just a bonus! You will also receive a Pro badge within the extension's interface and your requests on GitHub repository will have high priority. ▸ Magnetic Helper – Want the extension to work outside of the fullscreen? You can now attach an instance of UltraWideo to the video player that you select with this feature. If it can find the video player within the bounds that you selected, it will just work immediately. ▸ Accent Color – Personalize your UltraWideo interface with a custom color scheme. Choose from 8 carefully selected accent colors or stick with the original theme. The selected color will be applied throughout the extension's interface, giving it a unique look that matches your style. ▸ Disabled Mode – Streamline your workflow by disabling a mode you rarely use. This optimization allows for faster switching between your preferred modes using keyboard shortcuts or touch gestures. Perfect for users who have specific viewing preferences and want a more efficient way to access their favorite features. ▸ Consents – Take control of your notification preferences with granular consent settings. Choose which system messages you want to receive, from changelog updates to review reminders. This ensures you stay informed about important updates while avoiding unnecessary interruptions during your video watching sessions. ▸ Ambient Light – Enhance your viewing experience with a sophisticated ambient light effect that creates a more immersive atmosphere. This feature adds a premium feel to your video playback, particularly beneficial for videos where you may choose to keep the original aspect ratio. The blur effect also helps protect OLED displays from uneven burn-in issues. Purpose Gain power over the video in fullscreen mode. Primarily developed for 34" ultra-wide screens, but powerful for other smaller or larger screens too. I am currently using it on my Macbook Pro 14" to get rid of all black bars (horizontally and vertically), previously I used it on ultra-wide monitor. Usage Relatively easy to use, but powerful at its core. Comes with handful of options within small interface and keyboard shortcuts. ▸ Interface – Popup interface that you usually open by clicking on the extension icon, has built-in shortcut to toggle it for an easy access at your fingertips. ▸ Activity – This option will be enabled by default. To deactivate the features that it applies to the video element, toggle the switch. ▸ Mode – Upscale mode will be enabled by default and only one mode can be active at a time. ▸ Scale – It works simultaneously with the active mode and can scale the video up or down. The default value is 1 and it means that no scaling will be applied. Claims It is working on all globally popular video streaming platforms. Including all embeddable videos. If it doesn't work somewhere, open up a ticket on the support link that's provided (Github Issues) and I'll try to fix it for you and everybody else.

User reviews

Extension files

Browse and explore files within this extension package

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No network indicators were extracted from this version.

Version
Size
Verdict
Findings
Permhash
4.2.0
Latest
0.33 MBNot scanned—
eeea1c5b6d18828590737d44ee081de2c436660a4ec582e462e1c8c14dd72ac1
4.1.1
0.38 MBNot scanned—
eeea1c5b6d18828590737d44ee081de2c436660a4ec582e462e1c8c14dd72ac1
4.1.0
0.38 MBNot scanned—
eeea1c5b6d18828590737d44ee081de2c436660a4ec582e462e1c8c14dd72ac1
4.0.7
0.38 MBNot scanned—
eeea1c5b6d18828590737d44ee081de2c436660a4ec582e462e1c8c14dd72ac1
4.0.6
0.38 MBNot scanned—
eeea1c5b6d18828590737d44ee081de2c436660a4ec582e462e1c8c14dd72ac1
4.0.5
0.38 MBNot scanned—
eeea1c5b6d18828590737d44ee081de2c436660a4ec582e462e1c8c14dd72ac1
4.0.4
0.36 MBNot scanned—
eeea1c5b6d18828590737d44ee081de2c436660a4ec582e462e1c8c14dd72ac1
3.5.9
0.29 MBNo malware found0
956b0acb43d95b5225f7038541d192048b1c83230eec27fef2e75bd952c816ee
3.5.8
0.29 MBNot scanned—
956b0acb43d95b5225f7038541d192048b1c83230eec27fef2e75bd952c816ee
3.5.7
0.29 MBNot scanned—
956b0acb43d95b5225f7038541d192048b1c83230eec27fef2e75bd952c816ee
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