Examine source code of retro yellow pattern

{
  "theme": {
    "images": {
      "theme_frame": "FRONT32.JPG"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "retro yellow pattern",
  "manifest_version": 2,
  "description": "pattern by <a href=\"https://outgoing.prod.mozaws.net/v1/0c832ac52f9ef3208ab875c5071d18121f228399494854b572df22784c2d2298/http%3A//zebiii.deviantart.com/\" rel=\"nofollow\">http://zebiii.deviantart.com/</a>"
}