Examine source code of Web Gray

{
  "theme": {
    "images": {
      "theme_frame": "www_top.jpg"
    },
    "colors": {
      "frame": "#9a9999",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Web Gray",
  "manifest_version": 2,
  "description": "Not attractive more than contents but identical what browser it is. This is what web designer looking for daily job isn't it. I needed it then I made it."
}