Examine source code of Mac ExtraLight

{
  "theme": {
    "images": {
      "theme_frame": "g_header_gamma_2.jpg"
    },
    "colors": {
      "frame": "#d9dfdf",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Mac ExtraLight",
  "manifest_version": 2,
  "description": "A much lighter version compared to others in the series\n<a href=\"https://outgoing.prod.mozaws.net/v1/d0e8f1acbdea5a989b3ddc3de9f804ef51d973e51f94fdc9c8b56477edbecc1f/https%3A//www.getpersonas.com/en-US/gallery/Designer/sam8511\" rel=\"nofollow\">https://www.getpersonas.com/en-US/gallery/Designer/sam8511</a>"
}