[tbb-dev] TBB design doc updated for 4.0

Hello all, I've finally updated the design doc to cover TBB 4.0: https://www.torproject.org/projects/torbrowser/design/ In particular, the fingerprinting section saw substantial updates: https://www.torproject.org/projects/torbrowser/design/#fingerprinting-linkab... I also added a build security section that could probably use more links and more details: https://www.torproject.org/projects/torbrowser/design/#BuildSecurity Feedback welcome! Patches are even more welcomer! ;) The source repo lives at: https://gitweb.torproject.org/tor-browser-spec.git/tree/refs/heads/master:/d... -- Mike Perry