Window title change hook?

["Suraj Kumar" <suraj sunson in>]

Hi,

I'm writing an extension whereby I need to be notified when the title of a window changes (ex: when user switches between tabs inside a GDI window, say, emacs or Firefox). Is there any way I can get notified of such a change?

Context, if you are interested: I'm writing a productivity-checker extension which would warn me when I've been browsing the web for a longer time than I should be :)

cheers,

  -Suraj