I have never created any kind of extension and I would like to create one for Thunderbird that can password protect the Thunderbird client. Similar to something like Master Password+
https://addons.thunderbird.net/en-US/thunderbird/addon/master-password/
I have been reading the documentation and have learned how to create and extension but I am lost as for where to start. Could someone give me an idea of how I might implement this and what APIs I will be needing to use?