Here you’ll have all the information you need to be able develop the with the extension Firstly you’ll need to download ChromeDocumentation Index
Fetch the complete documentation index at: https://docs.teamsbutactuallygood.dev/llms.txt
Use this file to discover all available pages before exploring further.
Any other Chrome based browser will work, Firefox is not supported for dev (only for dev, normal user can use it normally) at this time
Settings and Extension like the screenshot under

Developer mod

Load unpacked extension, navigate to the extension path and open it, it should look like that

Developer Mode

Plugins
Create your own plugins to extend Teams’ functionality
Themes
Create custom CSS themes for Teams
