- Fixed accidental requests to addons.mozilla.org when an addon recommendation doorhanger is shown (bug 1526387)
- Improved playback of interactive Netflix videos (bug 1524500)
- Fixed color management not working on macOS (bug 1506495)
- Fixed incorrect sizing of the "Clear Recent History" window in some situations (bug 1523696)
- Fixed audio & video delays while making WebRTC calls (bug 1521577 & bug 1523817)
- Fixed video sizing problems during some WebRTC calls (bug 1520200)
- Fixed looping CONNECT requests when using WebSockets over HTTP/2 from behind a proxy server (bug 1523427)
- Fixed the "Enter" key not working on password entry fields for certain Linux distributions (bug 1523635)
- Various stability and security fixes.
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