John Hrvatin talked about Web Development Tools for Internet Explorer at Microsoft TechEd 2007 in Orlando. There, he introduced a tool called Ajax View, developed by Microsoft Research.
Ajax View is able to profile a site’s JavaScript. It acts as a HTTP proxy that instruments JavaScript as it’s served to the client based on a set of rules defined by plug-ins. More information and first release download here, a good introduction here.
... and ... don't bother me - I know, there is (at least) a smarter browser out there, with an immense and open ecosystem of dev-plugins... :-)
