Examine source code of Advanced Java Launch

{
  "description": "Advanced Java Launcher",
  "manifest_version": 2,
  "name": "Advanced Java Launch",
  "version": "1.8resigned1",
  "applications": {
    "gecko": {
      "id": "advjavalaunch@oneadvanced.com",
      "strict_min_version": "50.0"
    }
  },
  "background": {
    "scripts": [
      "optionsdb.js",
      "launch.js"
    ]
  },
  "permissions": [
    "nativeMessaging",
    "downloads",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/cp/*.do"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "16": "adv_icon_16.png",
    "32": "adv_icon_32.png",
    "48": "adv_icon_48.png",
    "128": "adv_icon_128.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}