Examine source code of 3DTriangles

{
  "manifest_version": 2,
  "version": "5",
  "name": "3DTriangles",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(2, 7, 10, 0.4)",
      "toolbar_text": "rgb(247, 243, 244)",
      "frame": "rgb(41, 128, 185)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(253, 253, 253, 0.2)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(0, 0, 0, 0)",
      "popup": "rgba(255, 255, 255, 0.95)",
      "popup_text": "rgb(0, 0, 0)",
      "ntp_text": "rgb(2, 7, 10)",
      "popup_border": "rgb(14, 1, 1)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgba(2, 7, 10, 0.4)",
      "sidebar_text": "rgb(0, 0, 0)",
      "tab_loading": "rgb(255, 255, 255)",
      "toolbar_field_border_focus": "rgb(0, 0, 0)",
      "toolbar_field_focus": "rgba(255, 255, 255, 0.94)",
      "toolbar_field_highlight": "rgba(12, 194, 205, 0.4)",
      "toolbar_field_text_focus": "rgb(0, 0, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{020f75df-ad0d-4318-8eab-2f25206a254d}"
    }
  }
}