According to Mozilla Blog, today Mozilla Teams with BlackBerry for Browser Security. The BlackBerry Mozilla collaboration is know as fuzzing and Mozilla introduced Minion. Minion is an open source security testing platform for developers and security professionals.
BlackBerry and Mozilla both use fuzzers extensively. Mozilla used Peach Fuzzer to test against various HTML5 features: Image formats, audio/video formats, fonts, multimedia, API, ect. and also to secure Firefox and Firefox OS users. BlackBerry used large scale automated testing to identify security issues via third-party fuzzers.