Examine source code of Ho Ho Ho...

{
  "theme": {
    "images": {
      "theme_frame": "HoHoHo_header_byLisa.jpg"
    },
    "colors": {
      "frame": "#b51616",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Ho Ho Ho...",
  "manifest_version": 2,
  "description": "Santa Claus, Rudolph the Red Nose Reindeer, Christmas gifts, text letters\nspelling out Ho Ho Ho, cheerful greeting, Merry Christmas\n\nchild friendly persona\n\nPersonas by LisaAtTheBeach"
}