I have already developed a C# win form application and a chrome extension with native messaging (another C# console app) to fetch user's active tab url. I have also developed an msi setup in WiX to write under the registry (HKLM/SOFTWARE/Wow6432Node/Google/Chrome/Extensions and HKLM\SOFTWARE\Wow6432Node\Google\Chrome\NativeMessagingHosts) programmatically and tested the installation of the chrome extension by running the setup on different Windows 7 machines. I am publishing this extension on chrome web store and then I shall install the extension on several client computers. I want to accomplish the same with Mozilla Firefox. I am newbie in this field and going through some Firefox developers guides (XPCOM, js-ctypes etc.) and getting little confused with multiple links. It would be of great help if anyone can guide me towards the exact solution. Please note that, 1) I have to install the extension programmatically through the same msi package which already contains my own C# app and the chrome extension with native app and 2) the client machines will be Windows only but any version (XP (optional), 7, 8, Server anything).