Examine source code of rabe7-theme4

{
  "theme": {
    "images": {
      "theme_frame": "raaaaaa.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "rabe7-theme4",
  "manifest_version": 2,
  "description": "made by Miss Sara...|| <a href=\"https://outgoing.prod.mozaws.net/v1/2218b6a6e412f90a0060a97f3794795f1ca71c37c44d70fe471361e87e8ee608/http%3A//www.rabe7.com\" rel=\"nofollow\">www.rabe7.com</a>"
}