Had worked very reliably until very recently, where it's now blocking the reactions button from appearing in youtube live chat in both chrome and firefox. leaving it at a four for now since it worked very well before, but will change to five if fixed. I've tracked it down to this extension as far as I know, as the button will appear when the extension is disabled.

disabling unwanted (live) channels doesnt work anymore in firefox

no I don't mistake a feature of BetterTTV. There is an option in the Tab "Sidebar" where I could mark/unmark the feature "Featured Channels", "Recommended Friends" and so on and it is unnecassary if it is marked or not in the sidebar there are no changes. In older versions it worked, that I can unmark these two categories and the channels were invisible in the sidebar.

It's a very good addon, and I would give this 5 stars, however there has been a bug plaguing this addon on Firefox.

BTTV Emotes will show on streams that are live, but they won't work on VODs on firefox.

Opera however seems to show emotes on VODs, so I've resorted to using that browser for watching VODs instead.