Examine source code of Unit Converter

{
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  "version": "1.0",
  "manifest_version": 3,
  "description": "__MSG_ExtensionDescription__",
  "default_locale": "en",
  "icons": {
    "32": "Icon.svg",
    "64": "Icon.svg"
  },
  "action": {
    "default_popup": "Popup.html",
    "default_icon": "Icon.svg"
  },
  "developer": {
    "name": "Mechanic Petux",
    "url": "https://github.com/MechanicPetux/Unit_Converter"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "Unit_Converter@Mechanic_Petux.lol",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}