Examine source code of MD Notes Saver

{
  "manifest_version": 2,
  "name": "MD Notes Saver",
  "version": "1.0",
  "description": "A simple extension to save and retrieve notes.",
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.png",
      "48": "icon.png",
      "128": "icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5333179a-3fad-467a-bedf-8dcc53984b11}"
    }
  }
}