https://www.qnap.com/ja-jp/release-notes/qts/4.4.1.1146/20191206
Microsoft Edge Beta 79.0.309.43
Beta Channel Update for Desktop
https://chromereleases.googleblog.com/2019/12/beta-channel-update-for-desktop.html
Wednesday, December 4, 2019
The beta channel has been updated to 79.0.3945.74 for Windows, Mac, and Linux.
Firefox Browser 71.0
https://www.mozilla.org/en-US/firefox/71.0/releasenotes/
Security Vulnerabilities fixed in - Firefox 71 - Mozilla Foundation Security Advisory 2019-36
追記
「Firefox 71」が正式リリース ~Windows版で動画のピクチャーインピクチャー再生が可能に - 窓の杜
追記終わり
Android 版も Firefox 68.3.0
https://www.mozilla.org/en-US/firefox/android/68.3.0/releasenotes/
Security Vulnerabilities fixed in - Firefox ESR 68.3 - Mozilla Foundation Security Advisory 2019-37