Examine source code of Evil Greetings

{
  "theme": {
    "images": {
      "theme_frame": "greetings.jpg"
    },
    "colors": {
      "frame": "#f0e7e7",
      "tab_background_text": "#7dc997"
    }
  },
  "version": "2.0",
  "name": "Evil Greetings",
  "manifest_version": 2,
  "description": "Seasons Greetings!"
}