Welcome to Thunderbird Add-ons.
Add extra features and styles to make Thunderbird your own.
Titz'apïx
Show in Mail URL for macOS Calendar 1.0
ruma z-aki
Copies the 'Show in Mail' URL to be pasted in an iOS/macOS Calendar event referering to the message ID. Can also be customized for gmail URLs using the custom URL format in the extension preferences.