Examine source code of Amber CRT

{
  "name": "Amber CRT",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(49, 54, 66, 1)",
      "tab_background_text": "rgba(255, 176, 0, 1)",
      "toolbar": "rgba(85, 85, 85, 1)",
      "bookmark_text": "rgba(255, 119, 0, 1)",
      "toolbar_field": "rgba(18, 18, 18, 1)",
      "toolbar_field_text": "rgba(255, 176, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{87270bb1-24dd-4d0d-9041-cfc264c1b464}"
    }
  }
}