Examine source code of black & white lines

{
  "theme": {
    "images": {
      "theme_frame": "bwbubbles.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "black & white lines",
  "manifest_version": 2,
  "description": "Brushes by nuarted\n<a href=\"https://outgoing.prod.mozaws.net/v1/29806402a24d021f0edb1307008d9383dca6ae1fc6cc551d4f477704aa8c6a54/http%3A//nuarted.deviantart.com/art/bokeh-new-brushes-90944545\" rel=\"nofollow\">http://nuarted.deviantart.com/art/bokeh-new-brushes-90944545</a>"
}