Examine source code of Plaid Hearts

{
  "theme": {
    "images": {
      "theme_frame": "plaid.jpg"
    },
    "colors": {
      "frame": "#949494",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Plaid Hearts",
  "manifest_version": 2,
  "description": "Plaid background with hearts.\n\nBrushes from: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/f3f4843395b7530404146535f327959d7b3e91bf2f8fc1179413bc350580b089/http%3A//www.obsidiandawn.com/\">http://www.obsidiandawn.com/</a>\nPattern from: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/ede70ec812e92e9a5d59ba4bd696ff7826faa156927ad360493d07f7624a408c/http%3A//eleanormorgan.deviantart.com/\">http://eleanormorgan.deviantart.com/</a>"
}