https://www.mozilla.org/en-US/firefox/73.0/releasenotes/
Security Vulnerabilities fixed in Firefox 73 - Mozilla Foundation Security Advisory 2020-05
Android 版 Firefox 68.5.0
https://www.mozilla.org/en-US/firefox/android/68.5.0/releasenotes/
Security Vulnerabilities fixed in Firefox ESR68.5 - Mozilla Foundation Security Advisory 2020-06