Examine source code of TPRJ

{
  "manifest_version": 2,
  "name": "Radio Javan Link Generator",
  "version": "2.2",
  "description": "Generates a direct download link for web page of a music on radiojavan website.",
  "icons": {
    "48": "icons/RJLG-48.png",
    "96": "icons/RJLG-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.radiojavan.com/mp3s/*"
      ],
      "js": [
        "RjLinkGenerator.js"
      ],
      "css": [
        "RjLinkGenerator.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "rj@techport.ir"
    }
  }
}