Examine source code of horizontiikk

{
  "theme": {
    "images": {
      "theme_frame": "img_0302.jpg"
    },
    "colors": {
      "frame": "#bcff4f",
      "tab_background_text": "#b6f734"
    }
  },
  "version": "2.0",
  "name": "horizontiikk",
  "manifest_version": 2
}