Examine source code of Classic IE3 Rings

{
  "theme": {
    "images": {
      "theme_frame": "2560250ie3.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Classic IE3 Rings",
  "manifest_version": 2,
  "description": "Anyone surfing the 'net with Windows in 96/97 knows what this is. Goes best together with IE themes for Firefox (such as Internet Exploration). It ain't perfect, then again nothing is"
}