Was unable to save custom preferences, and while the presets worked fine, I disliked having to reload a video if I decided during play to equalize the sound. Finally uninstalled the app, as it was also keeping sound from playing on a non-YouTube site (I narrowed it down by reopening Firefox in safe mode to make sure that was the cause). Good app but seems to need work.

Exactly what I needed, working on firefox 66.0.3 and only requires a refresh of the youtube page if you already had a video playing at the time of installation. PERFECT!!

Whenever I try to watch steaming videos on cytu.be, this addon made it so no videos load.

Great functionality and beautiful design. Exactly what I need.

One thing: the lowest two bands (32Hz and 64Hz) work strangely. The 32Hz band seems to change higher-frequency component than 32Hz and the 64Hz band does not change anything.

Have to disable on some sites like viki.com
This is really annoying.2 years without update. Is this addon abandoned?
Still 5 stars but would be nice if this could be fixed.

Finally my headphones received some kick. High5! Hoping for 4,5,6,8 channels (upmix is fine) for firefox. Keep it up! Best regards!

Das ist sehr gut! Perfect! Каращо! )

This is just what I needed. Higher pitched tones really disturb me. Thank you very much \(0.0)/

Guter Klang und leichte Einstellungen

Just about perfect

l'extention équalizer est super pratique, on peut tout gérer le top!

It's not a bad little audio tool. I like the pre-sets.

I use this to fine-tune music on YouTube (bass specifically). It does that job perfectly, hence the score. However this Add-on breaks a lot of other video related services like twitch.tv and certain file/flash types (.webm) for me. You will have to turn it off manually in the Add-on menu and hard refresh the page to get everything working properly again. @Dev: A quick on/off button when clicking the icon would be great for this reason. Happy holidays.