Examine source code of Oldgents 2011

{
  "theme": {
    "images": {
      "theme_frame": "OG_Persona_T_2011.jpg"
    },
    "colors": {
      "frame": "#666666",
      "tab_background_text": "#cccccc"
    }
  },
  "version": "2.0",
  "name": "Oldgents 2011",
  "manifest_version": 2,
  "description": "Celebrating <a href=\"https://outgoing.prod.mozaws.net/v1/83625305522dfc194bf5cd12c65fb3f060c7deaaf665aff59d2ebc3f48b1c4b5/http%3A//www.oldgents.com\" rel=\"nofollow\">www.oldgents.com</a> 10 years of gaming"
}