此版本的新增功能

Full release notes: https://github.com/servo/servo/wiki/Firefox-Reality-release-notes Documentation: https://github.com/servo/servo/blob/master/docs/hololens.md New features: - added an in-app web console (press the developer tools button next to the URL bar) - added a panel to enable experimental/incomplete features that are disabled by default - launching the app via a fxrmin:// URL instead of http:// brings up a kiosk mode with no browser UI (eg. fxrmin://www.servoexperiments.com/webxr-particles/) - remote developer tools now supports Firefox 79 & 80 New web content features: - Unity WebXR content is supported - dynamic imports are now supported for JS modules - added WebAudio support for MediaStreamAudioSourceNode and MediaStreamAudioDestinationNode - added support for ReadableStream Fixes: - The most recent page contents will now be fetched when reloading a page - The remote devtools port now remains constant between browser sessions - self-signed SSL certificate errors can now be bypassed - Focusing a text input now causes the on-screen keyboard to appear - SSL websocket connections can now be opened - Launching the app from a fxr:// URL now shows the full browser UI - Network requests now include the Referer (sic) header - Blank and srcdoc iframes can now perform network requests