Lovely little add-on as all say. I disagree with some people wanting space inserted between tabs and window though - what a waste, unless a 1p line. What I'd like to see is the ability to configure which URLs use the feature, regardless of whether app tab or not. for instance, you don't always want to keep a Google search tab open and and pinned as an app tab, but it would be great if when doing a search, the nav bar auto-hides, as who needs to see the search URL? Good work though.