Examine source code of Light Pink Collage

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Light Pink Collage",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "left bottom"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(245, 210, 231, 0.67)",
      "toolbar_text": "rgb(170, 67, 132)",
      "frame": "rgb(243, 223, 223)",
      "tab_background_text": "rgb(115, 45, 88)",
      "toolbar_field": "rgba(255, 233, 243, 0.68)",
      "toolbar_field_text": "rgb(198, 85, 155)",
      "tab_line": "rgb(198, 85, 155)",
      "popup": "rgba(245, 210, 231, 0.92)",
      "popup_text": "rgb(159, 79, 130)",
      "button_background_hover": "rgba(255, 233, 243, 0.94)",
      "icons_attention": "rgb(159, 46, 116)",
      "icons": "rgb(221, 53, 155)",
      "ntp_background": "rgba(253, 230, 240, 0.94)",
      "popup_border": "rgba(222, 131, 172, 0.94)",
      "tab_selected": "rgba(189, 32, 103, 0.43)",
      "tab_text": "rgba(255, 201, 226, 0.94)",
      "toolbar_bottom_separator": "rgba(202, 145, 172, 0.94)",
      "toolbar_field_border_focus": "rgba(255, 139, 191, 0.94)",
      "toolbar_field_border": "rgba(202, 145, 172, 0.94)",
      "toolbar_field_focus": "rgba(255, 219, 236, 0.94)",
      "toolbar_field_highlight": "rgba(202, 145, 172, 0.94)",
      "toolbar_top_separator": "rgba(255, 0, 111, 0.02)",
      "tab_loading": "rgb(198, 85, 155)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{30630f2a-fd59-4c57-bf6a-53a886e18e5a}"
    }
  }
}