Examine source code of SDR Web Radio

{
  "name": "SDR Web Radio",
  "version": "0.6.0",
  "manifest_version": 2,
  "description": "SDR Web Radio extension, a WebSDR companion",
  "icons": {
    "128": "images/icono128.png"
  },
  "browser_action": {
    "default_icon": "images/icono.png",
    "default_title": "SDR Web Radio"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "include_globs": [
        "*:8901*",
        "*:8902*",
        "*:8903*",
        "*websdr*"
      ],
      "exclude_globs": [
        "https://sdrwebradio.000webhostapp.com/",
        "http://*websdr.org/*",
        "https://ve3sun.com/*",
        "http://www.dxsummit.fi/*",
        "https://sdr.hu/"
      ],
      "js": [
        "content_scripts/jquery.js",
        "content_scripts/injector.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "images/*.jpeg",
    "images/*.png"
  ]
}