Hi, I wish to test my website using httpd.js. Now when I am trying create a add-on and use sdk/test/httpd by adding following line var { nsHttpServer } = require("sdk/test/httpd"); I am getting following error: Message: Error: This file was removed. A copy can be obtained from: https://github.com/mozilla/addon-sdk/blob/master/test/lib/httpd.js As new to Add on development I am unable to resolve this issue. Thanks in advance.