Examine source code of Yellow After Coldplay

{
  "theme": {
    "images": {
      "theme_frame": "YelloH.jpg"
    },
    "colors": {
      "frame": "#ffad08",
      "tab_background_text": "#ffff00"
    }
  },
  "version": "2.0",
  "name": "Yellow After Coldplay",
  "manifest_version": 2,
  "description": "So then I took my time\nOh what a thing to've done\nAnd it was all yellow\nFor Joann"
}