Examine source code of Kit (Light)

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Kit (Light)",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(247, 210, 244, 0.85)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(244, 221, 242)",
      "tab_background_text": "rgb(90, 72, 89)",
      "toolbar_field": "rgb(245, 225, 243)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(244, 119, 37)",
      "popup": "rgb(244, 221, 242)",
      "popup_text": "rgb(0, 0, 0)",
      "popup_border": "rgb(244, 119, 37)",
      "tab_loading": "rgb(244, 119, 37)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7919aab6-db42-4965-91b8-8dddc1b2b2af}"
    }
  }
}