Examine source code of Firefox Rear View

{
  "theme": {
    "images": {
      "theme_frame": "firefox_reflection_header.png"
    },
    "colors": {
      "frame": "#fffb08",
      "tab_background_text": "#fffb08"
    }
  },
  "version": "2.0",
  "name": "Firefox Rear View",
  "manifest_version": 2,
  "description": "Firefox reflection yellow Corvette"
}