Examine source code of Mastoshare

{
  "name": "Mastoshare",
  "description": "Mastoshareは、Masotodon向けの共有をサポートする拡張機能です。",
  "version": "2.0",
  "manifest_version": 3,
  "icons": {
    "16": "mastoshare-16.png",
    "48": "mastoshare-48.png",
    "128": "mastoshare-128.png"
  },
  "action": {
    "default_popup": "index.html"
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b6109c56-6092-4200-96bb-fbd9930deb77}"
    }
  }
}