Examine source code of Dark Tropical Rainforest

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Dark Tropical Rainforest",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(8, 15, 0)",
      "toolbar_text": "rgb(255, 215, 126)",
      "frame": "rgb(3, 3, 1)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 246, 224)",
      "tab_line": "rgb(174, 174, 174)",
      "popup": "rgb(33, 33, 33)",
      "popup_text": "rgb(255, 255, 255)",
      "frame_inactive": "rgb(19, 45, 12)",
      "ntp_background": "rgb(0, 0, 0)",
      "tab_loading": "rgb(174, 174, 174)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e3cc8b1c-2771-4673-bf6b-0bbca3ac7296}"
    }
  }
}