Business Profile
jsfunfuzz and DOMFuzz provides testing tools for JavaScript engines and DOM/layout APIs by generating candidate test cases, reducing them to small reproductions, and helping Firefox developers identify and fix bugs, including security vulnerabilities.
{"Mozilla Firefox developers","JavaScript engine teams","Security researchers","Fuzzing and browser testing communities"}
Produces reliable, reduced testcases and supports differential testing within the JavaScript engine and DOM/layout testing workflow; emphasizes creating small, reproducible test cases that accelerate bug diagnosis and patching.
Released jsfunfuzz and DOMFuzz on July 28, 2015; described as evolving over approximately 11 years of fuzzing activity with ongoing improvements and community uptake
Bug found through fuzzing interactions between modules; demonstrated the ability to uncover cross-module issues; contributed patch alongside Firefox developers
Illustrates complex module interaction detection via fuzzing; contributed fixes and demonstrated collaborative debugging across modules
Two fuzzers: one for testing JavaScript engines (jsfunfuzz) and one for testing layout and DOM APIs (DOMFuzz). They generate test cases, reduce them, and help reproduce and report bugs to Firefox developers.
Browser/JavaScript engine teams, security researchers, and fuzzing communities focused on browser reliability and security
Delivers small, reproducible test cases for complex browser bugs and security vulnerabilities, fostering efficient debugging and collaboration with developers through long-term fuzzing engagement
Requires a JavaScript engine/Firefox testing environment; supports options such as --fuzzing-safe; uses differential testing and test harness controls; emphasizes reduced testcases and reproducibility
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