Works great.

This causes YouTube to load low-res version of videos though :/

Pablito Alfredo salvador favre
0910326081
Cédula de ciudadanía de sudamericanos
Guayaquil ecuador sudamericano

работает, но.. весь контент уж давно в новом кодеке вп89, а мп4 уже и не видно, максимум увидите авц
¯\_(ツ)_/¯

Not work anymore. Only sound loudness normalization disabling work.

Flawless. Works perfectly on the current Youtube version. It disable 60fps keeping 2k 4k resolution. Thank you!

It works perfectly on my system!
Thank you so much!!!
h264ify was working fine but the options (e.g. block h264) didn't work until I restarted the browser which was quite annoying.

how to make it work outside of youtube? i need it for other sites too! verypoor!

Firefox 70 x64.... doesnot work. still AVC1

Allows you to disable Audio Normalization. Now you can listen to music on youtube again!