Examine source code of Gemius

{
  "theme": {
    "images": {
      "theme_frame": "top4.png"
    },
    "colors": {
      "frame": "#374b73",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Gemius",
  "manifest_version": 2,
  "description": "Gemius SA\n\nThis persona have been created especially for Gemius company members. Feel free to use it and I'm sure that clients would like it as well if the presentation requires the usage of Firefox."
}