Examine source code of Dave Strider

{
  "theme": {
    "images": {
      "theme_frame": "Head.png"
    },
    "colors": {
      "frame": "#403c3c",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Dave Strider",
  "manifest_version": 2,
  "description": "A persona based on a character from Homestuck at <a href=\"https://outgoing.prod.mozaws.net/v1/88f0ac8715237005b51b958737d35bd46941e45a2093ac6eb8f5416a227d39ae/http%3A//mspaintadventures.com\" rel=\"nofollow\">mspaintadventures.com</a>."
}