Examine source code of Go Go Yoshi

{
  "theme": {
    "images": {
      "theme_frame": "yoshipersona.jpg"
    },
    "colors": {
      "frame": "#165411",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Go Go Yoshi",
  "manifest_version": 2,
  "description": "A simple design featuring the cutest dinosaur ever, from the Super Mario video games series.\n(Layout works best with one line of bookmark links underneath URL entry, and a space on the right so that URL entry doesn't cover the image)"
}