Examine source code of samplinG

{
  "theme": {
    "images": {
      "theme_frame": "blackfg.png"
    },
    "colors": {
      "frame": "#c964cc",
      "tab_background_text": "#4f6bcf"
    }
  },
  "version": "2.0",
  "name": "samplinG",
  "manifest_version": 2,
  "description": "nothing !"
}