Examine source code of Stockings

{
  "theme": {
    "images": {
      "theme_frame": "FF-Persona-Stockings-top.jpg"
    },
    "colors": {
      "frame": "#2e6ec7",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Stockings",
  "manifest_version": 2,
  "description": "Stockings in colour; self-made photo; same as BW Stockings, but this time image is slightly streched."
}