Examine source code of Cuba Flags

{
  "theme": {
    "images": {
      "theme_frame": "cubaheader.jpg"
    },
    "colors": {
      "frame": "#0900ff",
      "tab_background_text": "#ff0000"
    }
  },
  "version": "2.0",
  "name": "Cuba Flags",
  "manifest_version": 2,
  "description": "364 days of the year, these flags are black with a white star. On July 26, the celebration of the revolution, they change the flags to the Cuban national flag for a day."
}