Examine source code of FirstCall

{
  "theme": {
    "images": {
      "theme_frame": "firstcall_Header2.png"
    },
    "colors": {
      "frame": "#080808",
      "tab_background_text": "#fcf9f9"
    }
  },
  "version": "2.0",
  "name": "FirstCall",
  "manifest_version": 2,
  "description": "FirstCall Network provides high-speed emergency notifications to Municipalities, State Agencies, Federal Agencies, institutions of Higher Education, Schools, Industries, and Corporations.\n\nThe FirstCall Emergency Notification System is a fast, effective, and efficient method for delivering real-time alerts. We are a focused interactive multi-media emergency communications solution.\n\nfor more information please visit <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/184967b28bbd8f377915dd9eb2d8c482cdd10cb54e1cb57b7e0b48d60d8664a8/http%3A//firstcall.net/main/\">http://firstcall.net/main/</a>"
}