I just made the switch from Chrome to Firefox and have found this extension to be really good, although I only gave it 4/5 stars simply because it doesn't have a pre-amp slider.
I don't specifically need the slider as I have a DAC with volume control, but anyone that already has low sound could really benefit from it.

excellent

no premap

Not working on dailymail.co.uk

This one does it for me, for example , my subwoofer only has a bass knob on the back side of the sub , so instead of killing my back with always trying to find the right level of bass I only have to use this, and its pretty useful , I would recommend this one instead of the other higher rated ones because its simpler and it shows you how much u modified exactly.

THE ADDITIVE IS SUPER BUT IT WORKS ONLY WITH VIDEO SITES. MAKE IT WORK WITH RADIO SITES ...

Clean look! Works awesome! Now I can take a lot of the heavy bass out of my music so it doesn't wake My neighbors! A lot of people don`t know how much adjusting the tone, or frequency amplitude of a broadcast can improve the experience! H5EQ is doing a great job of this for Me so far. Thanks!

Nice, but prevents Video Speed Controller from working, even when its not on but just actively installed.

Doesn't work...

De todos losque heprobado ha sido el más liviano, rápido y excelente calidad !

Cet equalizer me sert à mettre plus de basse avec mes intras de haute qualité. :p
Sous windows, c'est le mieux que j'ai testé et sous Fedora, c'est le seul qui fonctionne. Le son est nickel, le must pour écouter ou simplement regarder des clips.

A really nice helper to quickly improve sound on poor quality videos, or to reduce annoying frequencies, or to adjust bad acoustics or tune speakers. Thanks loads!

Just 2 "wishes" left over ;-)

1) On my studio speakers it sounds like the labeling is at least one octave wrong (the 1k sounds more like 500 hz or even lower)
2) I d appreciate it if the window itself would be quite a bit smaller so IF you'd leave it open it would NOT block so much of the video window.

both no big deals, just meant as my 2 cents.

big thanks again!

Claus

A good plugin but it does not allow the user to save and backup customized presets. There should be an import and export feature to backup all presets, so that settings can be restored (when needed) and shared between other systems/users.

Dieses Add-on macht www.save.tv unbrauchbar: Schaltet den Streaming-Ton unveränderbar und dauerhaft komplett aus !!!

BIG BOY TOY

I like the simplicity of it. Was able to set the enhancement I wanted and save it as preset right off. I also appreciate not having to restart video to engage EQ, as I did with another add-on which was otherwise pretty good. An easy five stars so far! Thanks so much.

The best equalizer with exact regulation of a given frequency. 5 stars from me. Good job! :)
PS: The amplifier bar would be aslo useful. You can consider adding it - Cheers. ;)