- Added W3C capabilities support in session payload and forwarded metadata; introduced new Firefox Options methods (addExtensions, setPreference) while removing legacy profile handling and requiredCapabilities.
- Updated language bindings and tooling: Python syntax highlighting, bumped Node to 8.9 LTS, Java to 3.7, fixed .NET build issues, and resolved IEDriverServer compile warnings.
- Cleaned up APIs and docs: removed unsupported browsers from the standard list, simplified proxy handling, fixed documentation examples, and added option to skip driver shutdown commands.