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.