Examine source code of Light Pixels

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#d4d4d4",
      "tab_background_text": "#5c5c5c"
    }
  },
  "version": "2.0",
  "name": "Light Pixels",
  "manifest_version": 2,
  "description": "Light Pixel pattern.\n\nPattern file provided by:\n<a href=\"https://outgoing.prod.mozaws.net/v1/21ad4863ba5cbe05883a9f77941f256deac0f5de1c48bec412f646de9c224bc0/http%3A//subtlepatterns.com/\" rel=\"nofollow\">http://subtlepatterns.com/</a>"
}