Examine source code of L - 4.14.15.20.5

{
  "theme": {
    "images": {
      "theme_frame": "Header09.jpg"
    },
    "colors": {
      "frame": "#dedada",
      "tab_background_text": "#e8e3e3"
    }
  },
  "version": "2.0",
  "name": "L - 4.14.15.20.5",
  "manifest_version": 2
}