- Updated the Python client (2.53.1‑2.53.6) with IPv6 address handling, corrected Firefox options/capabilities logic, and refined Marionette test behavior.
- Fixed a range of bugs across languages, including PhantomJS cookie handle leaks, selector escaping, capability serialization, and temporary file handling.
- Added minor enhancements and deprecations in the JavaScript bindings (file‑detector path handling, HTTPS request usage, and updated documentation links).
Selenium 2.53.1
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Added a new transport layer for generated BiDi modules and improved BiDi schema fidelity, including extensible types and validation of primitives.