Examine source code of Oceans and rocks

{
  "theme": {
    "images": {
      "theme_frame": "Ocean-and-Rocks.jpg"
    },
    "colors": {
      "frame": "#211570",
      "tab_background_text": "#bac"
    }
  },
  "version": "2.0",
  "name": "Oceans and rocks",
  "manifest_version": 2,
  "description": "A quiet beach scape at San Francisco"
}