Examine source code of Heartstopper Leaves

{
  "manifest_version": 2,
  "version": "2.0.0",
  "name": "Heartstopper Leaves",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(225, 234, 239, 0)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(255, 245, 190)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgba(255, 115, 48, 0.39)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgba(225, 234, 239, 0)",
      "popup": "rgba(255, 210, 89, 0.96)",
      "popup_text": "rgb(0, 0, 0)",
      "icons_attention": "rgb(85, 204, 158)",
      "icons": "rgb(0, 0, 0)",
      "ntp_background": "rgb(219, 230, 168)",
      "ntp_text": "rgb(0, 0, 0)",
      "sidebar_highlight_text": "rgb(0, 0, 0)",
      "sidebar_highlight": "rgb(0, 0, 0)",
      "sidebar_text": "rgb(0, 0, 0)",
      "sidebar": "rgb(255, 210, 89)",
      "tab_loading": "rgb(0, 0, 0)",
      "tab_selected": "rgba(182, 208, 61, 0.53)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_bottom_separator": "rgba(225, 234, 239, 0)",
      "toolbar_field_focus": "rgb(255, 253, 241)",
      "toolbar_field_highlight_text": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgb(85, 204, 158)",
      "toolbar_top_separator": "rgba(225, 234, 239, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{caf56315-a08f-4572-ac5a-f668fc9bfbf9}"
    }
  }
}