Mozilla and BlackBerry are collaborating on advanced automated security testing techniques known as fuzzing. Fault injection is a testing technique where specially designed software is created to inject a variety of unexpected or malformed data into a specific application, program or area of code. Mozilla has successfully used Peach to perform fuzz testing against HTML5 features such as: image formats, audio/video formats, fonts, fonts and multimedia APIs like WebGL and WebAudio. BlackBerry regularly uses third-party fuzzers, in addition to its own proprietary fuzzing tools, static analysis and vulnerability research, to identify and address potential security concerns.”]
Source: https://blog.mozilla.org/en/mozilla/mozilla-continues-to-build-the-web-as-a-platform-for-security/