https://docs.microsoft.com/en-us/deployedge/microsoft-edge-relnote-stable-channel Chrome/86.0.4240.193 おしい 本日 Google Chrome 86.0.4240.198 に更新されて周回遅れ

Stable Channel Update for Desktop This update includes 2 security fixes.

https://www.thunderbird.net/en-US/thunderbird/78.4.3/releasenotes/