Examine source code of Dark Floyd

{
  "manifest_version": 2,
  "version": "2.1resigned1",
  "name": "Dark Floyd",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "frame": "rgb(42, 42, 42)",
      "ntp_background": "rgb(42,42,42)",
      "ntp_text": "rgba(202,202,202,1)",
      "popup": "rgb(42, 42, 42)",
      "popup_highlight": "#21252B",
      "popup_highlight_text": "rgba(202,202,202,1)",
      "popup_text": "rgb(202, 202, 202)",
      "tab_line": "rgb(35, 205, 179)",
      "tab_loading": "rgb(35, 205, 179)",
      "tab_text": "rgba(202,202,202,1)",
      "tab_background_text": "rgb(202, 202, 202)",
      "toolbar": "rgba(42, 42, 42, 0)",
      "toolbar_field": "rgba(42, 42, 42, 0.67)",
      "toolbar_field_text": "rgb(202, 202, 202)",
      "bookmark_text": "rgb(202, 202, 202)",
      "sidebar": "rgba(42,42,42,1)",
      "sidebar_highlight": "#21252B",
      "sidebar_highlight_text": "rgba(202,202,202,1)",
      "sidebar_text": "rgba(202,202,202,1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2d8f8e3f-e48d-4796-895e-5bd708bf99bb}"
    }
  }
}