Examine source code of Transparent wall

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Transparent wall",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(61, 30, 45)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(50, 14, 62)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(69, 24, 45)",
      "popup": "rgb(50, 14, 62)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight_text": "rgb(236, 237, 241)",
      "sidebar_text": "rgb(255, 255, 255)",
      "tab_selected": "rgb(52, 106, 163)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(35, 82, 131)",
      "toolbar_field_text_focus": "rgb(255, 255, 255)",
      "tab_loading": "rgb(69, 24, 45)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4d738171-8bee-4ebf-b76f-7a4440133e3e}"
    }
  }
}