Examine source code of Green Day Breakdown

{
  "theme": {
    "images": {
      "theme_frame": "green-day-persona-header-3.jpg"
    },
    "colors": {
      "frame": "#700000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Green Day Breakdown",
  "manifest_version": 2,
  "description": "I noticed the lack of Green Day personas so I decided to make one! Enjoy :)"
}