Examine source code of Bokeh.

{
  "theme": {
    "images": {
      "theme_frame": "smallbokehheader1.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Bokeh.",
  "manifest_version": 2,
  "description": "For my first persona, I decided just to make some bokeh.  Ta-daaa.\n\n<a href=\"https://outgoing.prod.mozaws.net/v1/7c95d77d6c58c9587b6926aef1bea934c95ecb6282207417752265d47d64782e/http%3A//eightiseven.com\" rel=\"nofollow\">http://eightiseven.com</a>"
}