Examine source code of Lighthouse and sea

{
  "theme": {
    "images": {
      "theme_frame": "Lighthouse0.jpg"
    },
    "colors": {
      "frame": "#646f91",
      "tab_background_text": "#fcc78a"
    }
  },
  "version": "2.0",
  "name": "Lighthouse and sea",
  "manifest_version": 2,
  "description": "Lighthouse, sea, beach, and sky with clouds at dusk. Long exposure photography."
}