Examine source code of Favimoji

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "version": "1.0.0",
  "description": "__MSG_extDescription__",
  "default_locale": "en",
  "homepage_url": "https://github.com/nx-alejandrolacasa/favimoji",
  "developer": {
    "name": "Alejandro Lacasa",
    "url": "https://github.com/nx-alejandrolacasa"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg",
    "128": "icons/icon.svg"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "favimoji@nx-alejandrolacasa.github.io",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}