Examine source code of Christmas Balls 3a

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#f50808",
      "tab_background_text": "#f5eded"
    }
  },
  "version": "2.0",
  "name": "Christmas Balls 3a",
  "manifest_version": 2,
  "description": "Red, green and white ornaments with snowflakes"
}