Examine source code of Cat tired

{
  "theme": {
    "images": {
      "theme_frame": "rect2819.png"
    },
    "colors": {
      "frame": "#260d0d",
      "tab_background_text": "#3d0c0c"
    }
  },
  "version": "2.0",
  "name": "Cat tired",
  "manifest_version": 2,
  "description": "Cat's Life is so hard"
}