Examine source code of Bili SyncPlay

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "version": "1.1.2",
  "description": "__MSG_extensionDescription__",
  "default_locale": "zh_CN",
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://www.bilibili.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "__MSG_extensionName__",
    "default_icon": {
      "16": "icon-16.png",
      "48": "icon-48.png",
      "128": "icon-128.png"
    }
  },
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "page-bridge.js"
      ],
      "matches": [
        "https://www.bilibili.com/*"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.bilibili.com/video/*",
        "https://www.bilibili.com/bangumi/play/*",
        "https://www.bilibili.com/festival/*",
        "https://www.bilibili.com/list/watchlater*",
        "https://www.bilibili.com/medialist/play/watchlater*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "bili-syncplay@bilibili-tools.local",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity",
          "websiteActivity"
        ]
      }
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}