Long-standing bug that messes with the headers of media HTTP responses renders this extension nearly unusable with the different sites it affects, including but not limited to Bandcamp streaming. Seems to be no intention of updating the extension--let alone fixing it--anytime soon either.

Doesn't work in Mozilla Firefox. You guys may need some better developers. It's been 2 months. There's probably a bug or bugs somewhere within the coding.

It does not work

This shit not even works anywhere!

ещё лучше было бы, если на каждую вкладку можно делать свои настройки звука. или же например на одной вкладке он работает (активирован) , но на другой вкладке он был бы отключен, до тех пор пока я сам не включу )

Legit just breaks the site i try use it on. Videos turn black and completely stop working. Deleted within 2min.

This extension caused a critical issue with video playback on certain websites that use CDNs and HTTP Range streaming. After installing it, videos would not load in Firefox in normal mode, showing the error “The media could not be loaded…”, while ads and other content played normally.

In DevTools, media requests returned status 206 (Partial Content), but were marked as “blocked”, indicating that the data stream was being interrupted on the client side. Interestingly, videos worked correctly in Firefox’s private mode, which made the issue harder to diagnose initially.

This behavior suggests that the extension interferes directly with the media playback pipeline (MediaElement/WebAudio), causing conflicts with browser security policies (CORS/ORB) or segmented streaming. After removing the extension, the problem was completely resolved without any changes to browser settings.

Use with caution, as this extension may break video playback on sites that rely on CDN-based streaming or cross-subdomain media delivery.

does not include a voice/speech/podcast equalizer set. no way to import equalizers nor sync them to my firefox account - so re-entering a preset visually on 5 firefoxes after each major firefox upgrade is not sustainable

fine

funciona mal, se escucha más despacio con esto icluso subiendolo al máximo

I'm sorry but... it does not work.
I mean, the control panel is ok, but I have no effect on the audio.

Extra star for always being a reliable option.

breaks websites. i have been looking everywhere for months, been blaming it on the websites themselves, but it had been this extension all along. i do not recommend this, and will never install it again.

Doesn't work on Youtube anymore. Please fix if possible so I can give 5stars rate again.

Audio not in sync with video when used with airplay v1 devices. Bugreport filed.

Works well - when it works. Can reduce frequencies to improve spoken word audio on bad speakers, but does not work with some websites (Discord) and seems to lose the audio device sometimes.

Great little add-on, works flawlessly. Highly recommended!
EDIT: It's working nicely on its own, however, it blocks "Audio Output Selector" from AgentOink. That's really a pity when you want to listen to music or watch videos on a second device, because you'd have to disable the equalizer to do so.
Maybe there's a workaround or an update that could fix this.