Examine source code of Imagination pix

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#d4d4d4",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Imagination pix",
  "manifest_version": 2,
  "description": "Before you can use your new account you must activate it - this ensures the e-mail address you used is valid and belongs to you.  To activate your account, click the link below or copy and paste the whole thing into your browser's location bar:"
}