Reviews of h264ify

By: erkserkserks Add-on

List of user reviews and ratings for h264ify

Total ratings

4.42 (Rating count: 234)

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Review summary

Users praise h264ify for boosting performance on older machines by reducing CPU/RAM load and enabling hardware-accelerated H.264 on YouTube. It can help counteract AV1 usage by favoring older codecs. However, it can hide higher resolutions (2K/4K) and block VP8/VP9, which some dislike. The add-on may require manual config changes and restarts, and its lack of recent updates poses compatibility questions. Overall, a helpful tool for legacy setups with notable trade-offs.

Pros

Improves playback performance on older GPUs/CPUs, reducing lag and CPU/RAM usage.
Enables hardware-accelerated H.264 (AVC1) decoding for YouTube on older hardware.
Helps avoid YouTube's AV1 dominance by prioritizing older codecs (H.264/VP8/VP9) when possible.
Remains functional on long-ago maintained versions, providing value for legacy setups.

Cons

Disables higher resolutions above 1080p (e.g., 2K/4K) in some cases, reducing video quality options.
Blocks VP8/VP9 codecs, which can degrade quality or limit certain videos that rely on those formats.
Often requires manual tweaks (about:config) or a Firefox restart to apply changes.
Not updated for years (last around 6 years), raising potential compatibility concerns.

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User Reviews

Recent rating average: 4.60

All time rating average: 4.42

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8% (17)

Date	Author	Comment
2026-08-01	xc*****

2026-07-30	Li*****	Thank you ! A use a 12 years old laptop with a Pentium N3530 and 8 GIB of DDR3 ram (and the old and mythic HDD) and before, the laptop was crashing when a play a Youtube video but, with H.264, it don't crash anymore ! It just fine ! Ty ; ) (Operating System, Linux Mint 22.3 xfce)
Thank you ! A use a 12 years old laptop with a Pentium N3530 and 8 GIB of DDR3 ram (and the old and mythic HDD) and before, the laptop was crashing when a play a Youtube video but, with H.264, it don't crash anymore ! It just fine ! Ty ; ) (Operating System, Linux Mint 22.3 xfce)
2026-07-26	Fi*****

2026-05-01	Gr*****

2026-04-12	fl*****

2026-03-24	Te*****

2026-03-07	Fi*****	Działa prawidłowo. Po zmianie ustawień z reguły wymaga wyłączenia i włączenia firefoxa aby załapało. Dla starszych GPU i CPU z iGPU ten dodatek jest świetny. Na Atomie X5 w końcu youtube działa ze sprzętową akceleracją AVC1 (H.264).
Działa prawidłowo. Po zmianie ustawień z reguły wymaga wyłączenia i włączenia firefoxa aby załapało. Dla starszych GPU i CPU z iGPU ten dodatek jest świetny. Na Atomie X5 w końcu youtube działa ze sprzętową akceleracją AVC1 (H.264).
2026-02-16	An*****

2026-02-12	Lu*****	does't work, doesn't do anything
does't work, doesn't do anything
2026-01-22	Ir*****