Examine source code of Just Cats

{
  "theme": {
    "images": {
      "theme_frame": "catsh2.jpg"
    },
    "colors": {
      "frame": "#ebd0c7",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Just Cats",
  "manifest_version": 2,
  "description": "silhouettes, cats, kittens, border, feline, black, simple"
}