Examine source code of Foxy Like Colors

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Foxy Like Colors",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-008-60d2718f8c915b5ba09f31df5555b459.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(29, 16, 62, 0.8)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(82, 16, 16)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(43, 59, 89)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(0, 0, 0)",
      "popup": "rgba(0, 0, 0, 0.81)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(255, 213, 0)",
      "button_background_hover": "rgba(255, 216, 0, 0.9)",
      "icons_attention": "rgb(205, 108, 35)",
      "ntp_background": "rgb(0, 0, 0)",
      "popup_border": "rgb(61, 91, 135)",
      "tab_loading": "rgb(125, 0, 255)",
      "tab_selected": "rgb(164, 76, 10)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_focus": "rgba(16, 41, 78, 0.57)",
      "toolbar_field_highlight": "rgb(161, 84, 30)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{148bfdcb-9e49-4041-858a-ebe9f850f051}"
    }
  }
}