Examine source code of Wet Rocks

{
  "theme": {
    "images": {
      "theme_frame": "wet_rocks_200x3000.jpg"
    },
    "colors": {
      "frame": "#eff2d7",
      "tab_background_text": "#fffcf5"
    }
  },
  "version": "2.0",
  "name": "Wet Rocks",
  "manifest_version": 2,
  "description": "Wet rocks - Homer Spit, Alaska"
}