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.
YouTube High Definition - Enhance Your YouTube Experience
'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.
Add-on stats
Weekly download count: 1,471
Firefox on Android: Yes
Risk impact: High risk impact 
Risk likelihood:
Manifest version: 3
Permissions:
- storage
Host permissions:
- <all_urls>
Size: 216.79K
URLs: Website
Ranking
# 113 ▼ 1
Other platforms
Not available on Android
Not available on Edge
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Add-on summary
YouTube High Definition solves a number of annoying YouTube issues.
Features
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
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spammy, or outdated.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
- Lightweight and does not freeze videos while multitasking.
- Satisfies basic needs like applying preferred settings without complications.
Cons
- Frequently fails to apply preferred resolution settings (videos stuck at lower resolutions).
- Inconsistent functionality across different platforms (especially mobile).
- Overall ineffectiveness reported by multiple users (doesn't work as intended).
Most mentioned
- Does not change videos to high resolution as set by users.
- Extension fails to apply settings reliably for autoplay and video quality.
- Had issues on mobile versions of Firefox.
User reviews
by Hemmat Ammar, 2025-02-05
by Ulph, 2025-02-04
I've tried other highly Youtube improvement extensions here on add-on store. While this has less stuff you can do this does have what I mostly wanted. A big reason why I prefer this over others is while you can't customize the site. This extension hasn't once frozen my videos or randomly stop playing them while I multitask on other tabs witch frustrated me about them. I applied the same settings I was allowed to this extension and still no problems. If I could ask for 1 thing I would wish for a Sound Booster. Overall i will continue to use this and hope updates do continue.
by frax'ies, 2025-01-29
Add-on safety
Risk impact
YouTube High Definition requires some sensitive permissions that could impact your browser and data security. 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
YouTube High Definition has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- Low This extension was updated more than 6 months ago. Older versions are more likely to be stable and safe.
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