Examine source code of Berlin Gate

{
  "theme": {
    "images": {
      "theme_frame": "test.jpg"
    },
    "colors": {
      "frame": "#e35f5f",
      "tab_background_text": "#bfb5b5"
    }
  },
  "version": "2.0",
  "name": "Berlin Gate",
  "manifest_version": 2
}