Browser Tab name to reflect filename that is being viewed.

Currently, when viewing code on web browser, the tab name shows "group_name / repo name / filename", and most of the time filename is not shown because tab width is not wide enough.

When I have multiple tabs open to browse multiple files, often I have to clicked through each tab to find the right tab I'm looking for.

I think it would be much easier to navigate if tab name is just the filename.

Hope that made sense.