Examine source code of ifictionfr

{
  "theme": {
    "images": {
      "theme_frame": "persona_header_ifiction.png"
    },
    "colors": {
      "frame": "#b0b0b0",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "ifictionfr",
  "manifest_version": 2,
  "description": "- Persona inspired by our website about interactive fiction: <a href=\"https://outgoing.prod.mozaws.net/v1/9afb3a1fc722cd94a9e844a44096d4c606d5fde74ca49da5f9198471ffcb5eea/http%3A//ifiction.free.fr/\" rel=\"nofollow\">http://ifiction.free.fr/</a>\n\n- Can also be suitable for travelers, sailors and people enjoying compass and windrose (compass rose / rose des vents in French)!"
}