Get Windows username in a legacy (not WebExtensions) Firefox add-on

Question

I am working a Firefox add-on (which is written in JavaScript) and need to determine the Windows user currently logged on. Is there a way to do this?

Answer 1

Firefox already has Integrated Authentication built-in (many people don't know that).
See: https://developer.mozilla.org/en-US/docs/Integrated_Authentication

Here is a Popular Firefox addon that eases the configuration: https://addons.mozilla.org/nl/firefox/addon/integrated-auth-for-firefox/

Here is some extra explanation:
http://justgeeks.blogspot.nl/2011/01/firefox-supports-integrated-windows.html

Good luck!