Examine source code of TaskSyncExtension

{
  "manifest_version": 3,
  "name": "TaskSyncExtension",
  "version": "1.4.14",
  "description": "Extension to sync tasks between users",
  "permissions": [
    "storage",
    "cookies",
    "notifications",
    "alarms",
    "scripting",
    "tabs"
  ],
  "host_permissions": [
    "https://app.studeo.fi/*",
    "https://node3.b1tti.fi/*",
    "https://kampus.sanomapro.fi/*",
    "https://ville.utu.fi/*",
    "http://127.0.0.1:5000/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://app.studeo.fi/*",
        "https://kampus.sanomapro.fi/*",
        "https://ville.utu.fi/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": []
      },
      "id": "tasksync@collectseal120.com"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "styles.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "48": "icon48.png"
  }
}