Examine source code of LeaderTask

{
  "manifest_version": 2,
  "name": "LeaderTask",
  "short_name": "Создание задач в ЛидерТаске из Google Chrome",
  "description": "Создание задач в ЛидерТаске из Google Chrome",
  "version": "1.0.3",
  "author": "LeaderTask",
  "homepage_url": "https://www.leadertask.ru/",
  "icons": {
    "16": "images/icon16.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content/content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "jquery.js",
      "background/background.js"
    ]
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_title": "LeaderTask",
    "default_icon": "images/logo.png",
    "default_popup": "popup/popup.html"
  }
}