Examine source code of Flag Emoji Tooltip

{
  "manifest_version": 3,
  "name": "Flag Emoji Tooltip",
  "version": "1.0.1",
  "description": "Adds hover tooltips to flag emojis showing the country or flag name.",
  "developer": {
    "name": "Joe Cline",
    "url": "https://github.com/joewelds/flag-decoder"
  },
  "homepage_url": "https://github.com/joewelds/flag-decoder",
  "icons": {
    "48": "icons/flag-tooltip-48.svg",
    "96": "icons/flag-tooltip-96.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/flag-tooltip.js"
      ],
      "css": [
        "content/flag-tooltip.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "flag-emoji-tooltip@joecline-personal-tools",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}