Examine source code of Spider-Man/Deadpool

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Spider-Man/Deadpool",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "left bottom",
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(4, 43, 109)",
      "toolbar_field_text": "rgb(225, 234, 239)",
      "tab_line": "rgb(4, 43, 109)",
      "popup": "rgb(4, 43, 109)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgb(255, 255, 255)",
      "icons_attention": "rgb(4, 43, 109)",
      "icons": "rgb(4, 43, 109)",
      "tab_selected": "rgb(4, 43, 109)",
      "toolbar_top_separator": "rgba(4, 43, 109, 0)",
      "tab_loading": "rgb(4, 43, 109)"
    }
  }
}