Examine source code of Joyous Season

{
  "theme": {
    "images": {
      "theme_frame": "JoyousSeason_header_byLisa.jpg"
    },
    "colors": {
      "frame": "#cdd8dc",
      "tab_background_text": "#336666"
    }
  },
  "version": "2.0",
  "name": "Joyous Season",
  "manifest_version": 2,
  "description": "deer standing in a snowy forest, Christmas ornament hanging from a snowy pine tree, Merry Christmas, serene, peaceful, nature\n\nchild friendly persona\n\nPersonas by LisaAtTheBeach"
}