The extension should:
1) Be cross browser (chrome, firefox, IE, and safari) and easy to install (with the minimum amount of prompts)
2) Not require a browser restart, if possible
3) Be based on some established open source framework (Kango?)
4) Open a specific 'thank you' page upon successful installation
5) Provide a branded icon
6) When clicked, the branded icon should open a (second) web page
The deliverable will be full source code, build instructions, and any other necessary parts for building.