Nice this is exactly what I needed, I used to use "youtube enhancer" filters to do this, but that extension was removed and I can't find the source. This is even better because its not limited to youtube. I also stared it on github, thanks for creating this!

Finally found an addon with gamma adjustment! Thank you! :)

Спасибо за помощ

Works great for Udemy videos that have bright powerpoint presentations. Eyes are not strained due to the brightness.

best video color tuner, add an option to save settings as a profile if possible and easily restore from saved settings.

Please add a sharpness filter!

Can you add please a sharpness slider too? i like the extension by the way :)

Where have you been all this time? Works exactly like something that should have been included in the first place. And its so easy. man U deserve an award.

I use it since years... The best one available on firefox... Thanks a lot dude !!
It miss only one feature which is Sharpness !!

Perfect extension to make videos darker at night. Thanks to developers. Mozilla should recommend this extension to reach more people suffering from eye strain like me.

Идеальное расширения для регулировки яркости в онлайн видео. Наконец-то я нашел такое.

Can you add a sharpen filter?

Use this for watching netflix on my external monitor which isn't bright enough. Works perfectly.