Examine source code of Stylized Waterfall

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Waterfall ",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-036-40a272fe657f748396e017c7a64ee2dc.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 15, 15, 0.17)",
      "toolbar_text": "rgb(246, 255, 0)",
      "frame": "rgb(9, 137, 192)",
      "tab_background_text": "rgb(245, 247, 176)",
      "toolbar_field": "rgb(199, 245, 245)",
      "toolbar_field_text": "rgb(0, 12, 254)",
      "tab_line": "rgb(23, 66, 81)",
      "popup": "rgb(227, 247, 249)",
      "popup_text": "rgb(64, 69, 200)",
      "tab_loading": "rgb(23, 66, 81)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{36f42787-bede-440c-8e35-201ef7f710d0}"
    }
  }
}