Is anyone building a simple web browser UI (also known as "chrome") that implements WebView API? It would be great to have UI with all the core necessities, lik

Is anyone building a simple web browser UI (also known as "chrome") that implements WebView API? It would be great to have UI with all the core necessities, like navigation buttons, address bar, bookmarks, download management and few simple settings. User must be able to choose their preferred browser engine and switch it at will, even run one tab using webkit, another with servo. This way browser engine developers can concentrate on building the engine, and UI developers could easily experiment with various layouts and new features in forked projects.