Examine source code of Threads Helper

{
  "name": "Threads Helper",
  "version": "0.0.2",
  "manifest_version": 2,
  "description": "Force defaulting to following feed",
  "permissions": [],
  "icons": {
    "128": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.threads.net/*",
        "*://threads.net/*"
      ],
      "js": [
        "background.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{792d4ed2-297f-4680-b70a-3b3be059322e}"
    }
  }
}