Web browsers
With the gallant exception of Opera, the big browsers' security specs are buried deeper than a rootkit. Actually, you'd die digging. This is the best their marketers deign to offer.
Firefox
Internet Explorer
Safari
Safari's two forums are for Windows and everything else. Nice memorable links too:
Browser Security Handbook
... So frankly, that's generally cr@p. Michal Zalewski, on the other hand, maintains an impressive project detailing in minutiae the characteristics of the high five. Top job, Sir: