loading indicator in browser tab

Many web apps show some kind of indicator in the browser tab while things are loading. This is handy when you are going between multiple websites and you want to leave website 1 while it is loading data and look at something in website 2. Is there anyway to do that with Vaadin 7?

If I should be asking this someplace else, just tell me. Thought I would start in the Framework section. Thanks.

what is the solution?