Examine source code of Lenny Iceweasel

{
  "theme": {
    "images": {
      "theme_frame": "iceweaselPersonaHeader.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Lenny Iceweasel",
  "manifest_version": 2,
  "description": "Images from debian.org, geticeweasel.org, gnu.hands.com and firsttube.com. Looks best without my 1-Click Weather Add-On and probably performs best, as all of these Personas probably do on computer made within the last five years instead of my two dinosaurs."
}