Changes/fixes: Updated the wording and inclusion of more select license blocks in about:license. Updated some site-specific user-agent overrides for web compatibility. Updated the lz4 library for performance and security updates. Improved performance of JSON stringify. Further improved support for building on FreeBSD. Fixed a regression where changes to useragent compatibility required a restart to take effect. Fixed a regression where AES-GCM in WebCrypto ("subtle" crypto API) wasn't working. This could make certain login procedures fail to work. Fixed a full browser deadlock when page scripting would flood browsing history with rapid location state changes. Disabled AV1 codec use by default again since our implementation has significant streaming issues (particularly audio) that needs further work.