* OMTC (Off Main Thread Compositing) has been enabled by default on Windows.
* OpenH264 support (sandboxed) has been added.
* A new CSP (Content Security Policy) backend was implemented.
* Support for connecting to HTTP proxies over HTTPS was implemented.
* Improved reliability of the session restoration.
* WebCrypto support has been enhanced: Added RSA-OAEP, PBKDF2 and AES-KW support, implemented wrapKey and unwrapKey, enabled import/export of JWK-formatted keys.
* Fixed several stability issues.