Examine source code of Timeko Messaging

{
  "manifest_version": 2,
  "name": "Timeko Messaging",
  "description": "This extension allows the user to send messages to selected users.",
  "version": "0.4.8.6",
  "icons": {
    "16": "images/timeko16.png",
    "48": "images/timeko48.png",
    "128": "images/timeko128.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c21d8013-1b5f-4004-bd4e-634090b54f25}"
    }
  },
  "browser_action": {
    "default_icon": "images/timeko48.png"
  },
  "web_accessible_resources": [
    "images/timeko.png",
    "fonts/weblysleekuisb-webfont.eot",
    "fonts/weblysleekuisb-webfont.svg",
    "fonts/weblysleekuisb-webfont.ttf",
    "fonts/weblysleekuisb-webfont.woff",
    "company.html",
    "styles/company.css",
    "scripts/company.js",
    "scripts/vendor/jquery-3.2.1.min.js",
    "images/timeko-logo-black.svg",
    "images/signin-people.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "styles/timeko.css"
      ],
      "js": [
        "scripts/vendor/jquery-3.2.1.min.js",
        "scripts/vendor/js.cookie.js",
        "scripts/timeko.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "storage"
  ]
}