Examine source code of Hidan v.1

{
  "theme": {
    "images": {
      "theme_frame": "hidanpersonanafirefox-mniejszy.png"
    },
    "colors": {
      "frame": "#0d0d0d",
      "tab_background_text": "#f7f7f7"
    }
  },
  "version": "2.0",
  "name": "Hidan v.1",
  "manifest_version": 2,
  "description": "Hidanek dla przyjaciółki. Hope ya like it :3"
}