Examine source code of ZeeKey

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDesc__",
  "short_name": "__MSG_extShortName__",
  "version": "1.0.22resigned1",
  "default_locale": "en",
  "browser_action": {
    "default_icon": {
      "19": "img/Zee-key-19.png",
      "38": "img/Zee-key-38.png"
    },
    "default_title": "__MSG_extShortName__",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "img/Zee-key-16.png",
    "48": "img/Zee-key-48.png",
    "128": "img/Zee-key-128.png"
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self';",
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "js/jquery-3.3.1.min.js",
        "js/bootstrap.min.js",
        "js/bootbox.min.js",
        "fillPage.js"
      ],
      "css": [
        "css/bootstrap.min.css"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "js/underscore-min.js",
      "commonMethods.js",
      "background.js",
      "fillPage.js"
    ]
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "webNavigation",
    "nativeMessaging"
  ],
  "applications": {
    "gecko": {
      "id": "zeekey@zeetim.com"
    }
  }
}