Examine source code of Quote Pop-up

{
  "manifest_version": 2,
  "name": "Quote Pop-up",
  "version": "1.0",
  "description": "Displays quotes about hard work and passive income",
  "icons": {
    "48": "logo.png"
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ff2c9fdc-5e6c-4410-9f01-0e7b993be3e2}"
    }
  }
}