Examine source code of Elf & Dragon

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Elf & Dragon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(196, 224, 194, 0.13)",
      "toolbar_field": "rgba(219, 247, 255, 0)",
      "toolbar_field_text": "rgb(217, 237, 215)",
      "tab_line": "rgb(147, 243, 142)",
      "popup": "rgb(111, 141, 109)",
      "popup_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(147, 243, 142)",
      "bookmark_text": "rgb(255, 255, 255)",
      "frame": "rgb(111, 141, 109)",
      "tab_background_text": "rgb(201, 237, 199)"
    }
  }
}