Examine source code of Gromit in charge ANIMATED

{
  "theme": {
    "images": {
      "theme_frame": "Gromit-head.png"
    },
    "colors": {
      "frame": "#bfbbbb",
      "tab_background_text": "#e35f5f"
    }
  },
  "version": "2.0",
  "name": "Gromit in charge ANIMATED",
  "manifest_version": 2,
  "description": "Gromit is in charge and definately has everything under control.\nRed text on black background.\nAll the best.\nDay."
}