Examine source code of Fox splash

{
  "theme": {
    "images": {
      "theme_frame": "Foxsplash_header.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#002036"
    }
  },
  "version": "2.0",
  "name": "Fox splash",
  "manifest_version": 2,
  "description": "A splash effect for Fire Fox !\n\nmy gallery at :\n<a href=\"https://outgoing.prod.mozaws.net/v1/e70f01902826f277fac126be7e5a4d3f1d21b4216eca100af2e199bb3b478c2e/http%3A//elreviae.deviantart.com\" rel=\"nofollow\">elreviae.deviantart.com</a>"
}