Interesting to see a lot of Google contributors to the WebKit memory corruption issue. Does Google or Apple push more commits to WebKit these days, or is it about even?
http://neugierig.org/software/chromium/notes/2010/02/webkit-...
Which shows that Google overtook Apple in late 2009. I don't know if that's still current, but the blog author did post the python source code he wrote to make that graph. Perhaps some enterprising HN reader can update us for 2013?
Also apparently there's a guy at Google who fuzzes Mozilla code using Google servers and collects a lot of Mozilla bounties (like $100k/yr) personally, which is kind of an interesting ethical thing :)