Examine source code of Applied Epic Extension

{
  "name": "__MSG_extName__",
  "default_locale": "en",
  "author": "Applied Systems",
  "description": "__MSG_extDescription__",
  "version": "3.17.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "AppliedEpicExtension@gmail.com"
    }
  },
  "manifest_version": 2,
  "permissions": [
    "nativeMessaging",
    "management",
    "cookies",
    "*://*.appliedepic.com/*"
  ],
  "background": {
    "page": "background.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.appliedepic.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}