This is little more than an extension that puts the hangouts.google.com page in its own minimal window without any of the normal task buttons. Not nearly as good as the chrome plugin, but better than nothing. Considering what it is, i'd give it 4 stars, except that it's always on top with seemingly no way to change this. This "feature" makes the plugin completely unusable for any one-screen setup. Your'e better off just going directly to the google hangouts page.