Besides various bug fixes and stability/performance improvements, notable new features of this release include:

• The new ProbingMutator
• An improved lifting algorithm that can inline expression and results in more readable samples
• A new static corpus mode useful for example to search for variants of bugs or when attempting to reproduce flaky crashes
• Full support for object literals and class definitions in FuzzIL
• Detailed statistics about the performance of CodeGenerators and Mutators with --logLevel=verbose
• Misc. new code generators and language features for things like web workers, forcing JIT compilation, global/hoisted variables, or for creating simple arrays
• A refactored code building algorithm and JavaScript environment model

Besides various bug fixes and stability/performance improvements, notable new features of this release include:

• The new ExplorationMutator
• A new and improved splicing algorithm
• The swarm testing mode for distributed fuzzing
• A new argument randomization mode to run the targeted JavaScript engines with randomized arguments
• Various new JavaScript language features in FuzzIL such as support for spreading and destructuring
• Better documentation about how Fuzzilli works
• A new, simple GenerativeEngine used to generate an initial corpus if starting without one
• A new corpus synchronization mode for distributed fuzzing

Besides various stability and performance improvements, notable new features of this release include:

• Support for distributed fuzzing with Docker and on GCE
• Many new JavaScript language features in FuzzIL, such as BigInts and RegExes, thanks to @carl-smith and @amarekano
• Support for the Duktape and JerryScript JavaScript engines (as well as numerous bugs fixed in them) thanks to @WilliamParks and @nszetei respectively
• A new minifying mode for the JavaScriptLifter to reduce the size of scripts during fuzzing thanks to @samo98: c90914d
• The ability to capture stdout and stderr during fuzzing, which is used to include the failure message of a crash (e.g. from a failed assertion or a sanitizer) as comment in the reproducer JS file: a24e205
• Support for fuzzing v8 without additional patches thanks to @peter-ralbovsky: v8/v8@70eb089
• Protobufs as serialization format for FuzzIL and as message format for network synchronization: 8b119db
• A refactored code generation algorithm and CodeGenerator interface: 43d4d9d