Examine source code of Igor 2010

{
  "theme": {
    "images": {
      "theme_frame": "personafirefox.jpg"
    },
    "colors": {
      "frame": "#fad5d5",
      "tab_background_text": "#eceda5"
    }
  },
  "version": "2.0",
  "name": "Igor 2010",
  "manifest_version": 2,
  "description": "igor"
}