Examine source code of cyberart

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "cyberart",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.18)",
      "toolbar_text": "rgba(132, 168, 67, 0.62)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(132, 168, 67)",
      "toolbar_field": "rgb(12, 12, 12)",
      "toolbar_field_text": "rgb(132, 168, 67)",
      "tab_line": "rgb(175, 255, 0)",
      "popup": "rgba(13, 14, 13, 0.7)",
      "popup_text": "rgb(87, 120, 33)",
      "button_background_hover": "rgba(146, 59, 39, 0.29)",
      "sidebar_highlight_text": "rgba(146, 59, 39, 0.12)",
      "sidebar_highlight": "rgba(146, 59, 39, 0)",
      "sidebar_text": "rgb(87, 120, 33)",
      "sidebar": "rgb(16, 17, 16)",
      "toolbar_field_border": "rgb(0, 0, 0)",
      "tab_loading": "rgb(175, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{90b9a004-f548-4262-91a0-683f4106a7a9}"
    }
  }
}