Examine source code of Moon 3

{
  "theme": {
    "images": {
      "theme_frame": "Moon3Persona.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "Moon 3",
  "manifest_version": 2,
  "description": "Moon and Sun photo from NASA.\nPhoto composite created in Photoshop.\nSee more from PeakPixels on our YouTube channel."
}