Examine source code of seechat

{
  "theme": {
    "images": {
      "theme_frame": "firefox-head.jpg"
    },
    "colors": {
      "frame": "#6e7073",
      "tab_background_text": "#0f9cd9"
    }
  },
  "version": "2.0",
  "name": "seechat",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/da6bbfe70eb7d9292b7507eb6148ce2efeb55d89c9b1c3e25b3e134ab4635457/http%3A//seechat.de\" rel=\"nofollow\">seechat.de</a> | Die Bodensee Community"
}