What you propose there reminds me of Atlantis: http://research.microsoft.com/apps/pubs/default.aspx?id=154698 http://research.microsoft.com/apps/pubs/default.as

What you propose there reminds me of Atlantis: http://research.microsoft.com/apps/pubs/default.aspx?id=154698 http://research.microsoft.com/apps/pubs/default.aspx?id=1546... – James Mickens did a talk as well: http://www.youtube.com/watch?v=4c0DdOvH6lg http://www.youtube.com/watch?v=4c0DdOvH6lg Basically they reduce the browser to a VM where everything except a few core things run in the page's context (including the protocol implementations, layout and scripting) which enables a few nice things.