Examine source code of Set It Off

{
  "theme": {
    "images": {
      "theme_frame": "FirefoxPersonaSIO.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Set It Off",
  "manifest_version": 2,
  "description": "This one is pretty much the same as my other SIO persona but with the Set It Off band name centered without the Horrible Kids EP name under it"
}