Examine source code of Fuecoco

{
  "name": "Fuecoco",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "1200px-Fuecoco.png"
    },
    "colors": {
      "frame": "rgba(214, 0, 11, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6f3e8a93-343a-4b06-9814-dfca5ec3485f}"
    }
  }
}