Examine source code of Dreamcast VMU

{
  "name": "Dreamcast VMU",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Dreamcast VMU.png"
    },
    "colors": {
      "frame": "rgba(136, 204, 168, 1)",
      "tab_background_text": "rgba(8, 20, 128, 1)",
      "toolbar": "rgba(136, 204, 168, 1)",
      "bookmark_text": "rgba(8, 20, 128, 1)",
      "toolbar_field": "rgba(136, 204, 168, 1)",
      "toolbar_field_text": "rgba(8, 20, 128, 1)",
      "tab_line": "rgba(8, 20, 128, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{72a1472b-da51-44a7-8421-db6eb8caf1fa}"
    }
  }
}