Examine source code of Leijstra-Creations2

{
  "theme": {
    "images": {
      "theme_frame": "Leijstra_Creations_Firefox_header.png"
    },
    "colors": {
      "frame": "#d4d0d0",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Leijstra-Creations2",
  "manifest_version": 2,
  "description": "Persona for Leijstra-Creations"
}