Examine source code of The best OS by pp4mnk

{
  "name": "The best OS",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "excal2251252.png"
    },
    "colors": {
      "frame": "rgba(183, 200, 240, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(114, 149, 232, 1)",
      "toolbar_field": "rgba(144, 148, 219, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1f6f8ba0-529b-4c9b-8f60-7814758f4acb}"
    }
  }
}