Examine source code of My Simple dExtension

{
  "manifest_version": 2,
  "name": "My Simple Extension",
  "version": "1.0",
  "description": "A very simple Firefox extension (Manifest V2).",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [],
  "browser_action": {
    "default_title": "Simple Extension"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a002ca5f-c368-4001-ab64-1c5bbf3aacb9}"
    }
  }
}