Examine source code of doost

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#9fe098",
      "tab_background_text": "#203c63"
    }
  },
  "version": "2.0",
  "name": "doost",
  "manifest_version": 2,
  "description": "designing by \"mimteam\", \"<a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/c4af1bbed0993c677aa4daa825f5e8629a3ab5c3b646c4c11dd6624e612ed998/http%3A//mimteam.com\">mimteam.com</a>\"\nthe theme not created by mimteam!"
}