The bad news for you is that Mozilla Firefox plugins cannot be developed in .NET managed code, but the good news is that they can be easily developed using XML, Javascript, and CSS. There is a comprehensive tutorial on creating a FireFox panel here:
http://www.borngeek.com/firefox/toolbar-tutorial/
Chrome plugins are created using the same combination of XML / HTML, Javascript, and CSS, but may require browser APIs that do not guarantee compatibility with FrieFox APIs. I would suggest starting with the documentation for Chrome Labs .
source
share