From mozilla: https://bugzilla.mozilla.org/show_bug.cgi?id=jsfunfuzz This is hot. Does anyone want to run this and report bugs? Jesse Ruderman already reported these two: http://bugs.webkit.org/show_bug.cgi?id=10878 http://bugs.webkit.org/show_bug.cgi?id=10880 But he said that he found 260 bugs in Mozilla's JS with this. Regards, Maciej