Examine source code of Feu d'artifice

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#13f0f0",
      "tab_background_text": "#511f7d"
    }
  },
  "version": "2.0",
  "name": "Feu d'artifice",
  "manifest_version": 2
}