Examine source code of smooth voilet

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "purple smooth",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-024-8de86d890779309c9a66423c64daa480.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(173, 138, 248)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(235, 236, 243)",
      "tab_background_text": "rgb(124, 127, 127)",
      "toolbar_field": "rgba(255, 255, 255, 0.9)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgba(255, 66, 205, 0)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(84, 84, 84)",
      "button_background_active": "rgba(193, 25, 25, 0)",
      "frame_inactive": "rgba(167, 34, 34, 0)",
      "tab_loading": "rgba(255, 66, 205, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{59caf76e-e89e-4a87-aff9-63741d21cd1d}"
    }
  }
}