Examine source code of bilibili helper

{
  "manifest_version": 2,
  "name": "B学习站助手",
  "version": "3.7.0",
  "description": "B站笔记导出，导出备份收藏、历史记录",
  "icons": {
    "16": "img/icon.png",
    "48": "img/icon.png",
    "128": "img/icon.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": "img/icon.png",
    "default_title": "B学习站助手",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/jquery-3.6.0.min.js",
        "js/content-script.js"
      ],
      "css": [
        "css/custom.css"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "tabs",
    "cookies",
    "*://*.bilibili.com/*",
    "notifications"
  ],
  "homepage_url": "http://vnote.littlefly.fun/#/",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "{f63fccf4-dc2d-44e9-906f-34e3ea2c7a59}"
    }
  }
}