Examine source code of KDE-Adwaita Mix

{
  "manifest_version": 2,
  "version": "1.2.1",
  "name": "KDE-Adwaita Mix",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(39, 39, 39)",
      "toolbar_text": "rgb(238, 238, 236)",
      "frame": "rgb(53, 53, 53)",
      "tab_background_text": "rgb(238, 238, 236)",
      "toolbar_field": "rgb(65, 65, 65)",
      "toolbar_field_border_focus": "rgb(43, 84, 165)",
      "toolbar_field_text": "rgb(238, 238, 236)",
      "toolbar_field_highlight": "rgb(43, 84, 165)",
      "tab_line": "rgb(43, 84, 165)",
      "tab_selected": "rgb(43, 84, 165)",
      "popup": "rgb(53, 53, 53)",
      "popup_text": "rgb(238, 238, 238)",
      "button_background_active": "rgb(43, 84, 165)",
      "button_background_hover": "rgb(43, 84, 165)",
      "icons_attention": "rgb(255, 143, 23)",
      "icons": "rgb(238, 238, 236)",
      "ntp_background": "rgb(65, 65, 65)",
      "popup_border": "rgb(39, 39, 39)",
      "popup_highlight": "rgb(43, 84, 165)",
      "sidebar_border": "rgb(39, 39, 39)",
      "sidebar_highlight": "rgb(43, 84, 165)",
      "tab_loading": "rgb(43, 84, 165)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b565873a-7f89-419c-a01d-457fbea770ba}"
    }
  }
}