Examine source code of Toggle GitHub Details

{
  "manifest_version": 3,
  "name": "Toggle GitHub Details in Comments",
  "version": "1.0.0",
  "description": "Toggle all <details> within GitHub PR/issue comments by clicking the toolbar button.",
  "browser_specific_settings": {
    "gecko": {
      "id": "github-toggle-all-details@geiserx",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Toggle details in comments",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png"
    }
  },
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*",
        "https://*.github.com/*"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_idle"
    }
  ]
}