Examine source code of sersa2

{
  "theme": {
    "images": {
      "theme_frame": "tema-sersa-top.png"
    },
    "colors": {
      "frame": "#12e8d6",
      "tab_background_text": "#fff"
    }
  },
  "version": "2.0",
  "name": "sersa2",
  "manifest_version": 2
}