Examine source code of Simple Note Popup

{
  "manifest_version": 2,
  "name": "Simple Note Popup",
  "version": "1.0",
  "description": "A minimal popup to write and save quick notes.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png",
    "default_title": "Simple Note Popup"
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dde6b97f-bac3-4f6a-9e4d-ae4db3c75a46}"
    }
  }
}