Examine source code of STS-131

{
  "theme": {
    "images": {
      "theme_frame": "Firefox_131_top_jpeg.jpg"
    },
    "colors": {
      "frame": "#575573",
      "tab_background_text": "#c2c2c2"
    }
  },
  "version": "2.0",
  "name": "STS-131",
  "manifest_version": 2,
  "description": "A persona for fans of the STS-131 shuttle flight"
}