Examine source code of Custom_Script_1

{
  "manifest_version": 3,
  "name": "Custom_Script_1",
  "version": "1.0",
  "description": "Adds a red border to all webpages matching mozilla.org.",
  "browser_specific_settings": {
    "gecko": {
      "id": "mmk1717@zohomail.inmyid",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/border-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}