Mozilla was working on a solution to this some time ago (back when Aza was still with Mozilla, early 2010 is the latest date in the linked design doc): http://w

Mozilla was working on a solution to this some time ago (back when Aza was still with Mozilla, early 2010 is the latest date in the linked design doc): http://www.azarask.in/blog/post/identity-in-the-browser-firefox/ http://www.azarask.in/blog/post/identity-in-the-browser-fire... From the document he links to it seems more like a fancy password manager that handles session cookies too with the idea of standardizing account management. Not necessarily a lofty vision but certainly something helpful and interesting (albeit seemingly dead now).