Works great with Firefox, but not Chrome or Edge. But Firefox has other deficiencies. I wish I could find one browser that does everything, but at present I have to run atleast two simultaneously.

Enabling this extension completely disables sound in some websites (like factorio.com). The sound only works when I open the video in a new tab. I have tried the 'none' preset too, but the sound only works when I disable the extension (either using the checkbox or using firefox). EDIT: Github issues shows that this is a Firefox problem, not an extension one. This problem can easily be fixed by disabling it for troublesome sites.

It helps for sure, I needed it to listen to a round table with 4 participants who each have a different level varying from 10 to 15 DB (impression that the velocity is twice as strong or half as weak).
What is difficult is the setting without a VU meter, in order to "see" the lowest level to use it as an "uncompressed" reference, and to be able to "align" the compression of the strongest signals with the weakest. This would avoid "compressing" the signal too much, which would avoid increasing the background noise with the reverberations.
One thing that's missing is the signage and it's hard to understand, for example, if the ratio is 2:1-3:1 or 4:1 or if the attack is in milliseconds or whatever.
I managed to adjust it by ear and I don't need it often so it's fine for me, but for those who aren't too used to it, by reading the comments it seem it's not very easy for many.
It was a good idea to make this plugin, so thanks to the developer. Good job.

Does what it says. The UI could be cleaned up a bit and a shortcut to enable/disable would be really good to have.

I agree it would be much better if we could limit the effect to only one tab, while disabling it on other tabs.

EDIT:
Ah yeah. It's was just a bit odd, saving on one page, then having to go to a different tab to turn it off for all the other tabs. I think that was because the default was set to on though, I've made the default off, so hopefully it will stay off now, unless I save.