Examine source code of Scarlet Macaw

{
  "theme": {
    "images": {
      "theme_frame": "macawfirefoxheader.jpg"
    },
    "colors": {
      "frame": "#ffcccc",
      "tab_background_text": "#002601"
    }
  },
  "version": "2.0",
  "name": "Scarlet Macaw",
  "manifest_version": 2,
  "description": "stock images from <a href=\"https://outgoing.prod.mozaws.net/v1/14fbbd5db9622a4aa933b8cf02737954e4e90a4073a65f488cddba6c1cc2ecc2/http%3A//www.sxc.hu\" rel=\"nofollow\">www.sxc.hu</a>\nPhotographer: Fernando Weberich \"papaleguas\""
}