Examine source code of firefoxfire2

{
  "theme": {
    "images": {
      "theme_frame": "200.jpg"
    },
    "colors": {
      "frame": "#e62600",
      "tab_background_text": "#f2a100"
    }
  },
  "version": "2.0",
  "name": "firefoxfire2",
  "manifest_version": 2,
  "description": "Firefox"
}