Examine source code of Leopard Soft

{
  "theme": {
    "images": {
      "theme_frame": "leopardsoftheader.jpg"
    },
    "colors": {
      "frame": "#260f0f",
      "tab_background_text": "#2b1313"
    }
  },
  "version": "2.0",
  "name": "Leopard Soft",
  "manifest_version": 2,
  "description": "Still another natural leopard print, but this one is blurred and softened down, so it will not interfere with the main stuff on your browser, plus it will dress it up a bit. Nice!"
}