Examine source code of Hazel Gundam

{
  "name": "Hazel Gundam",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#030000",
      "tab_background_text": "#ffffff",
      "toolbar": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{22de1bf8-6629-4e84-ab1a-23f97c99b81b}"
    }
  }
}