Hi, currently working on making it lighter, the methods used to intercept YT code are heavy and need to be improved, though this is mostly limited to logged in users and when the comment section loads. Volume boost was never a feature present in Iridium, but controlling the mini player is a matter of moving it with the right mouse button. Resizing it was not re-implemented though, I need to find an easier way to do it that is not as complex as it was before.

Hi, I simply stopped updating the extension a few years ago due to other priorities, and resumed work a few months ago. In that time that I was absent YT changed significantly and the extension was no longer working correctly, which lead to the very deserving lower ratings.

Sure, sounds like a simple enough feature, I will add that to the next version. You can follow the progress here if you want: https://github.com/ParticleCore/Iridium/issues/961

Glad to hear you got the issue resolved. Sorry for the confusion, the autoplay button is simply a shortcut that toggles the feature so users don't have to go into the extension settings and do it there, it is simply a convenience feature that can also be disabled if you don't want another button on the page.