• Update license to MPL 2.0
• Make string concatenation with + fast
• Java class generation updates and fixes
• Faster number to string conversion
• Several RegExp fixes
• RegExp performance improvements
• ES5 compliance fixes
• Improved interpreter performance
• Improved CommonJS module implementation
• JavaScript 1.8 generator expressions
• Many Parser and AST fixes
• Use JavaScript 1.7 as default version in Rhino shell
• JavaAdapter improvements
• Fixes in JS to Java access
• Include Mozilla test suite

A list of bugs that were fixed since the previous release.