Examine source code of Purple Watermelon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Purple Watermelon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-031-9570e8d1f7a5f835c92e764693337f43.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(38, 0, 72)",
      "toolbar_text": "rgb(0, 255, 44)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 0, 149)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(179, 89, 255)",
      "popup": "rgb(0, 2, 39)",
      "popup_text": "rgb(0, 255, 44)",
      "button_background_hover": "rgb(0, 0, 0)",
      "tab_text": "rgb(0, 255, 44)",
      "toolbar_bottom_separator": "rgb(0, 0, 0)",
      "toolbar_field_border": "rgb(0, 168, 185)",
      "toolbar_field_highlight_text": "rgb(255, 0, 149)",
      "toolbar_field_highlight": "rgb(52, 52, 52)",
      "toolbar_top_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(179, 89, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a802ddc7-d0d3-44e7-9bd1-b73ee81daeda}"
    }
  }
}