Examine source code of Orangey Dreamcast

{
  "theme": {
    "images": {
      "theme_frame": "DreamcastPersonaHead.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#db3a00"
    }
  },
  "version": "2.0",
  "name": "Orangey Dreamcast",
  "manifest_version": 2,
  "description": "For NSTC-U and NSTC-J Dreamcast Fans using Firefox"
}