Examine source code of TeamM4

{
  "theme": {
    "images": {
      "theme_frame": "TeamMustang4-1.jpg"
    },
    "colors": {
      "frame": "#5a46f2",
      "tab_background_text": "#ae9ef7"
    }
  },
  "version": "2.0",
  "name": "TeamM4",
  "manifest_version": 2,
  "description": "前Verを少しいじってFirefox4用にカスタマイズしました。"
}