Examine source code of Abstract Black Inverted

{
  "theme": {
    "images": {
      "theme_frame": "Abstract2inverted.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Abstract Black Inverted",
  "manifest_version": 2,
  "description": "only inverted the colors for a dark theme, all credit goes to the original artist, <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/cf09d560277d26a72d8797d3a48d08e7bd3629435beb17eda60658861cb4bafd/http%3A//www.getpersonas.com/gallery/Designer/Protoss4898\">http://www.getpersonas.com/gallery/Designer/Protoss4898</a>"
}