Examine source code of Tufted Damask

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Tufted Damask",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_text": "rgb(209, 215, 228)",
      "frame": "rgb(8, 11, 33)",
      "tab_background_text": "rgb(140, 144, 153)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(140, 144, 153)",
      "tab_line": "rgba(255, 0, 225, 0.37)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(140, 144, 153)",
      "icons": "rgba(255, 0, 252, 0.7)",
      "popup_border": "rgba(0, 0, 0, 0)",
      "popup_highlight": "rgba(152, 152, 152, 0.23)",
      "tab_loading": "rgba(255, 0, 225, 0.37)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cf21cacf-3c5a-4a6b-9ced-dc5135f1cc13}"
    }
  }
}