Examine source code of Team Northern Beta1

{
  "theme": {
    "images": {
      "theme_frame": "tn_firefoxhead.png"
    },
    "colors": {
      "frame": "#3c00ff",
      "tab_background_text": "#0004ff"
    }
  },
  "version": "2.0",
  "name": "Team Northern Beta1",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/dfe910333ee6182ea2d73718a8e1969d26d24444b60c198e51a0b6cb2b07417d/http%3A//www.tnorthern.com\" rel=\"nofollow\">http://www.tnorthern.com</a>"
}