Examine source code of Coven Nami

{
  "manifest_version": 2,
  "version": "3.0",
  "name": "Coven Nami",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg",
        "images/1.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center",
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(26, 24, 45, 0)",
      "toolbar_text": "rgb(248, 119, 146)",
      "frame": "rgb(142, 179, 201)",
      "tab_background_text": "rgb(253, 180, 195)",
      "toolbar_field": "rgba(68, 66, 120, 0.29)",
      "toolbar_field_text": "rgba(112, 113, 174, 0.61)",
      "tab_line": "rgb(248, 119, 146)",
      "popup": "rgba(84, 85, 125, 0.84)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgba(49, 50, 109, 0.84)",
      "icons_attention": "rgb(253, 180, 195)",
      "icons": "rgb(253, 180, 195)",
      "ntp_background": "rgba(65, 66, 100, 0.66)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgba(112, 113, 174, 0.61)",
      "popup_highlight_text": "rgb(248, 119, 146)",
      "popup_highlight": "rgba(45, 45, 60, 0.83)",
      "sidebar_border": "rgb(253, 180, 195)",
      "sidebar_highlight_text": "rgb(248, 119, 146)",
      "sidebar_highlight": "rgba(45, 45, 60, 0.83)",
      "sidebar_text": "rgb(248, 119, 146)",
      "sidebar": "rgb(156, 156, 226)",
      "tab_background_separator": "rgb(253, 180, 195)",
      "tab_loading": "rgb(253, 180, 195)",
      "tab_selected": "rgba(88, 88, 147, 0.59)",
      "tab_text": "rgb(248, 119, 146)",
      "toolbar_bottom_separator": "rgb(156, 156, 226)",
      "toolbar_field_border_focus": "rgba(156, 156, 226, 0.7)",
      "toolbar_field_border": "rgba(156, 156, 226, 0.7)",
      "toolbar_field_focus": "rgba(49, 50, 109, 0.84)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(253, 180, 195)",
      "toolbar_field_separator": "rgb(253, 180, 195)",
      "toolbar_field_text_focus": "rgb(253, 180, 195)",
      "toolbar_top_separator": "rgba(112, 113, 174, 0.53)",
      "toolbar_vertical_separator": "rgba(112, 113, 174, 0.53)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f4c26d69-e5c8-48a1-9ee5-85efce0981be}"
    }
  }
}