Works on all videos.
The panel is slow to open.
Thanks.

Checked c.net for a literal hour not finding what I was looking for with many different quarries to no avail...
Typed one word in the search bar for fire fox extensions, and found this, what I was looking for, with in seconds.
Then created an account for fire fox, verified said account, so I could actually rate this, and give it a good review.
(spent more time creating/activating and reviewing this than I did finding it PLUS! installing it) So long story short? Ty!

works very decent:-)

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!!

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