Examine source code of Sky And Grass

{
  "theme": {
    "images": {
      "theme_frame": "Header.jpg"
    },
    "colors": {
      "frame": "#242424",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Sky And Grass",
  "manifest_version": 2,
  "description": "Brushes used :\nVector Foliage by Obsidian Dawn\n<a href=\"https://outgoing.prod.mozaws.net/v1/0632a4eafd88149df46b57a087fc6eb4b9a0ea7f49ab9b18642d9308f04c867b/http%3A//www.obsidiandawn.com/vector-foliage-photoshop-gimp-brushes\" rel=\"nofollow\">http://www.obsidiandawn.com/vector-foliage-photoshop-gimp-brushes</a>"
}