Examine source code of Unique Hearts

{
  "theme": {
    "images": {
      "theme_frame": "glitterhartscopy.jpg"
    },
    "colors": {
      "frame": "#3406b5",
      "tab_background_text": "#e32712"
    }
  },
  "version": "2.0",
  "name": "Unique Hearts",
  "manifest_version": 2,
  "description": "colorful\nhearts\nharts\ncandy\ncandy hearts\ncandy harts"
}