Examine source code of Soviet Russia

{
  "theme": {
    "images": {
      "theme_frame": "Soviet-Final.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#ffffcc"
    }
  },
  "version": "2.0",
  "name": "Soviet Russia",
  "manifest_version": 2,
  "description": "Quite neat and simple theme. Either you are nostalgic for the past Soviet days or just love Soviet symbolics, this theme will be a pleasant addition to your FF."
}