Or, getting rid of tabs and going back to individual browser windows, but with some mechanism to visualise and navigate between them better on the desktop (e.g. window shrinks to 30% of full size on loss focus and stays to a side of the desk top until restored). I remember managing a fairly large number of Internet Explorer windows on Windows 98.
I thought about that too, the ability to group windows into tabs*, regardless of application is better managed by the desktop environment, rather than application.