Examine source code of trueno neon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "trueno neon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center",
        "left center",
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "no-repeat",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(67, 240, 255, 0.06)",
      "toolbar_text": "rgb(99, 217, 231)",
      "frame": "rgb(9, 12, 9)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 51, 95)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(33, 139, 160)",
      "tab_loading": "rgb(255, 51, 95)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9f5b29fb-7396-4c25-bbb8-3b72753fda5e}"
    }
  }
}