Examine source code of www.oweinidesign.com

{
  "theme": {
    "images": {
      "theme_frame": "firefox_top4.jpg"
    },
    "colors": {
      "frame": "#d4d4d4",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "www.oweinidesign.com",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/2246acedc0b9964804ea6b7d347721a429b0a99b0bdefffc49c0a87c69d98f02/http%3A//www.oweinidesign.com\" rel=\"nofollow\">www.oweinidesign.com</a>"
}