Examine source code of Blue Gray Plastic

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blue Gray Plastic",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(231, 237, 240)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(34, 59, 72)",
      "tab_background_text": "rgb(248, 248, 248)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(94, 115, 125)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(201, 216, 222)",
      "icons_attention": "rgb(94, 115, 125)",
      "ntp_background": "rgb(94, 115, 125)",
      "popup_border": "rgba(138, 138, 138, 0)",
      "tab_selected": "rgb(94, 115, 125)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgb(201, 216, 222)",
      "toolbar_field_border_focus": "rgb(94, 115, 125)",
      "toolbar_field_border": "rgb(201, 216, 222)",
      "tab_loading": "rgb(94, 115, 125)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f01137d0-f5dd-4131-bc76-c112af4c6dc7}"
    }
  }
}