Examine source code of Gmail Alias Generator

{
  "manifest_version": 3,
  "name": "Gmail Alias Generator",
  "version": "1.2",
  "description": "Alias Gmail basés sur le site courant.",
  "browser_specific_settings": {
    "gecko": {
      "id": "elblanco.alias.generator@addons.mozilla.org",
      "data_collection_permissions": {
        "collects_data": false,
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon-48.png",
      "96": "icon-96.png"
    }
  },
  "icons": {
    "48": "icon-48.png",
    "96": "icon-96.png"
  },
  "permissions": [
    "storage",
    "clipboardWrite",
    "tabs"
  ]
}