Examine source code of BlackbirdPress.org

{
  "theme": {
    "images": {
      "theme_frame": "header1.jpg"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "BlackbirdPress.org",
  "manifest_version": 2,
  "description": "<a href=\"https://outgoing.prod.mozaws.net/v1/4ae34d2c99498035f4d96cdb0449d1494300474d9017ac0665627247945842fd/http%3A//blackbirdpress.org\" rel=\"nofollow\">http://blackbirdpress.org</a>"
}