Examine source code of PocketHub

{
  "name": "PocketHub",
  "version": "1.0.6",
  "description": "PocketHub｜书签管理、网址导航",
  "icons": {
    "16": "images/icon.png",
    "48": "images/icon.png",
    "128": "images/icon.png"
  },
  "chrome_url_overrides": {
    "newtab": "newtab/index.html"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": "images/icon.png",
    "default_title": "PocketHub｜书签管理、网址导航",
    "default_popup": "index.html"
  },
  "background": {
    "scripts": [
      "static/js/background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "http://qaq.cn/*",
        "https://qaq.com/*"
      ],
      "css": [
        "static/css/content.css"
      ],
      "js": [
        "static/js/content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "tabs",
    "activeTab",
    "declarativeContent",
    "storage",
    "notifications",
    "cookies",
    "http://*/*",
    "https://*/*"
  ],
  "web_accessible_resources": [
    "insert.js"
  ],
  "content_security_policy": "script-src 'self' 'sha256-KAxoezpWQLstcxoLMDyg/ldu4FUKkX//2quL1ZG//UY=' 'unsafe-eval' https://g.alicdn.com  https://cf.aliyun.com  'unsafe-inline'; object-src 'self",
  "browser_specific_settings": {
    "gecko": {
      "id": "{a228a0a1-1491-4e41-bdac-35567fc88bc8}"
    }
  }
}