Examine source code of Orange Ade

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Orange Ade",
  "manifest_version": 2,
  "description": "Light orange background with fading white slash.\n\nI was looking for mellow colors to use to differentiate between different open FF profile windows and couldn't find anything solid, light and unobtrusive. So I made these.  Hope you like them.\n\nIf you want to see more of my vector graphic work, check out <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/a92b5c4fbc5897ec0144e0c271fbfb2e2416127a6f6b156731873393746b9e7b/http%3A//botaday.com\">botaday.com</a>"
}