Ultrawidify

Aspect ratio fixer for Youtube. Allows improperly encoded videos to properly fit ultrawide and superwide displays (e.g. 21:9) — and it attempts to do so automatically.

Ultrawidify: Aspect Ratio Fixer for Firefox

Ultrawidify is a Firefox add-on that greatly improves video viewing on ultra and super-wide displays. Capable of auto-detecting and fixing aspect ratios for a smoother viewing experience, it supports a wide range of video platforms from Youtube to Twitch, Vimeo to Streamable, and more. In cases where auto-detection isn't possible due to site restrictions, this handy tool provides manual adjustment options. Further features include video alignment, player detection override and stretch video capabilities for improved versatility.

Add-on stats

Daily users: 5,952
3
Version: 5.1.7 (Last updated: 2024-01-28)
Version code: 5683713
Creation date: 2016-10-16
Weekly download count: 211
Firefox on Android: No
Manifest version: 2
Permissions:
  • storage
  • activeTab
  • <all_urls>
Size: 3.05M
URLs: Website

Other platforms

Ultrawidify (v6.2.4)
3.39 (303) 50,000
Not available on Android
Ultrawidify (v5.1.7)
3.40 (55) 25,779
Want to check extension ranking and stats more quickly for other Firefox add-ons? Install Chrome-Stats extension to view Firefox-Stats data as you browse the Firefox Browser Add-ons.

Add-on summary

Need to remove unnecessary black bars from this youtube video you're watching? Ultrawidify is here for you. It should work on Youtube, Netflix, Twitch, Vimeo, Streamable (and on embedded videos that are hosted on these sites). It may work elsewhere as well, but no guarantees.

Important note: This addon is only tested and intended to work with Google Chrome specifically. If you're using a different browser, you're on your own. No, Edge is not Google Chrome (and neither is any other chromium-based browser).

FEATURES

1. AUTOMATIC ASPECT RATIO DETECTION Ensures that video will be cropped without you having to lift a finger. It even re-adjusts crop if aspect ratio changes mid-video. Autodetection is not 100% accurate and has some limitations, but it's accurate enough for most cases.

Autodetection is not supported on all sites. Some sites (e.g. Netflix, Disney+, Hulu) use DRM in order to prevent video piracy, and such protection measures interfere with automatic aspect ratio detection.

2. MANUAL ASPECT RATIO CORRECTION

See more

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Effectively stretches videos to 16:9 without cropping, particularly useful for YouTube and Twitch
  • Resolves the black bar issue in streaming videos
  • Offers flexible settings for various aspect ratios like 18:9 and 21:9
  • User-friendly for ultrawide monitor owners, enhancing video viewing experience
Cons
  • Performance issues leading to lag during video playback or unresponsiveness of the tab
  • Inconsistent functionality across different streaming platforms, requiring frequent adjustments
  • Some users report that it worked better in earlier versions
  • The add-on can become unusable after a period of time without adjustment
Most mentioned
  • Laggy performance or unresponsiveness after some time
  • Success in fixing black bar issues
  • Need for frequent readjustment of settings across different platforms
  • Effectiveness for users with ultrawide screens, especially for specific aspect ratios
User reviews

by must0, 2025-01-20

Worked great until recently. After watching videos for a while (not using fullscreen) the whole window turns grey and the audio keeps playing but the tab becomes completely unresponsive and can only be fixed by closing the browser
by vandim, 2024-11-23
View all user reviews

Add-on safety

Risk impact

Ultrawidify requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

We don't have sufficient data to confidently determine the risk likelihood of Ultrawidify. Use it at your own risk.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
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