Examine source code of Kitty Hang On

{
  "theme": {
    "images": {
      "theme_frame": "hangonkittyheaderjpg.JPG"
    },
    "colors": {
      "frame": "#9195ff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Kitty Hang On",
  "manifest_version": 2,
  "description": "2 cats trying to hang on!"
}