https://www.mozilla.org/en-US/firefox/69.0/releasenotes/
Security vulnerabilities fixed in Firefox 69 - Mozilla Foundation Security Advisory 2019-25
Android 版は ESR と同じバージョンとなって 68.1
https://www.mozilla.org/en-US/firefox/android/68.1/releasenotes/
Security vulnerabilities fixed in Firefox ESR 68.1 - Mozilla Foundation Security Advisory 2019-26