Examine source code of Cat feet

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Cat feet",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(23, 23, 25)",
      "toolbar_text": "rgb(126, 6, 30)",
      "frame": "rgb(32, 41, 46)",
      "tab_background_text": "rgb(142, 14, 16)",
      "toolbar_field": "rgb(127, 10, 12)",
      "toolbar_field_text": "rgb(22, 171, 240)",
      "tab_line": "rgb(248, 112, 140)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(58, 64, 188)",
      "tab_loading": "rgb(248, 112, 140)"
    }
  }
}