Examine source code of FUN88

{
  "name": "Lighting Stars",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "1000021511.jpg"
    },
    "colors": {
      "frame": "rgba(21, 35, 66, 1)",
      "tab_background_text": "rgba(235, 230, 230, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bf414235-b774-4e06-af10-0f2dab27376f}"
    }
  }
}