enhanced-h264ify

Choose what video codec YouTube should play for you

Enhanced-H264ify: Optimize YouTube Playback on Firefox

Enhanced-h264ify is a Firefox extension specifically designed to optimize YouTube playback. This add-on is a fork of the well-known h264ify, designed to block VP8/VP9 codecs on YouTube and prioritize H264, a codec supported by many devices for hardware decoding. Users can manually block or allow various codecs including H264, VP8, VP9, AV1, and manage other features such as 60fps video. Works solely on YouTube platform.
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Add-on stats

By: Alex
Users: 8,443
277
Rating: 4.39
(94)
Version: 2.2.1 (Last updated: 2024-05-30)
Creation date: 2019-04-07
Weekly download count: 457
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood:
Moderate risk likelihood
Manifest version: 3
Permissions:
  • storage
Size: 25.57K

Ranking

# 863 ▼ 11
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Other platforms

enhanced-h264ify (v2.2.1)
4.78 (156) 80,000
Not available on Android
Not available on Edge
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Add-on summary

Analyze keywords

enhanced-h264ify is a fork of well-known h264ify extension for Firefox/Chrome which blocks VP8/VP9 codecs on YouTube, so that you can use H264 only. This may be useful because there are lots of devices on the market which support H264 hardware decoding and do not support VP8/VP9.

This extension has new features such as manual blocking of H264, VP8, VP9, AV1 codecs and 60fps video. By default it blocks everything but H264 and 60fps video. It works only on YouTube. GitHub: https://github.com/alextrv/enhanced-h264ify

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
  • Helps improve performance on older hardware
  • Can resolve iGPU heating issues on certain MacBook Pro models
  • Works as intended for blocking h264 to fix playback issues
Cons
  • Does not work reliably on YouTube
  • Frequent audio issues, such as sound dropping every few seconds
  • Initial setup may require checking Firefox settings to avoid blocklisting
Most mentioned
  • Does not work on YouTube
  • Audio issues during playback
  • Improves performance for older CPUs
User reviews
I have no idea what the other reviewers are talking about. Before blaming the app, perhaps you might want to take a look at your firefox's about:support settings and make sure that your settings/OS/drivers aren't blocklisting the h264 functionality. This project has made my old Sandy Bridge i5-2435M, Ivy Bridge i5-3320M and Haswell i7-4960HQ fully USABLE in the year of our lord 2025. Of course certain iGPUs aren't powerful enough even with AVC decode (thinking about my first gen Arrandale i7-640M) on 1080p, but hell, this thing just works! Thank you for continuing this project Alex.
by beepboop, 2025-01-09
Flat out does nothing on youtube, codec is still AV1.
by Niloss, 2025-01-05
Not only would videos not load, but it continuously tried to play an ad for a specific adblocker when enabled
by Firefox user 18342948, 2024-12-30
View all user reviews

Add-on safety

Risk impact

enhanced-h264ify requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk likelihood

enhanced-h264ify is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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