YouTube High Definition

YouTube High Definition

YouTube High Definition is a powerful tool that automatically plays all YouTube videos in HD, changes video player size, offers auto-stop and mute, and much more.

What is YouTube High Definition?
'YouTube High Definition' is a highly efficient Firefox add-on that automatically plays all YouTube videos in the highest possible resolution. The users have the choice to specify their preferred resolution. Other features include control over the video player size, video volume, auto-mute, and auto-stop functionalities. It also works seamlessly when videos are embedded onto external sites.
Version: 118.0.5 (Last updated: 2023-09-21)
Creation date: 2011-07-15
Weekly download count: 1,414
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood: Very low risk likelihood
Manifest version: 3
  • storage
Host permissions:
  • <all_urls>
Size: 216.45K
URLs: Website
Stats date:

Other platforms

YouTube High Definition
YouTube High Definition (v118.0.3)
3.79 (159) 10,000
Not available on Edge
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YouTube High Definition solves a number of annoying YouTube issues.


Automatically play all YouTube videos in the highest resolution possible

Specify your preferred resolution (4k, 1440p,1080p, 720p, 480p, 360p, 240p, 144p)

Change video player size 

Control auto-mute volume and auto-stop video play 

Supports HD play when videos are embedded in external sites like Facebook, Twitter, Reddit, and others

Set a preferred volume level for all videos
See more
User reviews
User reviews summary
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.
  • It's amazing
  • Very useful extension
  • Stops working after some time
  • Inconsistent video quality
  • Doesn't work on mobile
Most mentioned
  • Stops working after some time
  • Doesn't work on mobile
Recent reviews

by MaxDuke, 2024-04-06
View all user reviews
Risk impact

YouTube High Definition is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install YouTube High Definition if you trust the publisher.

Risk likelihood

YouTube High Definition has earned a good reputation and can be trusted.

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