Examine source code of Real Life Plus Theme

{
  "theme": {
    "images": {
      "theme_frame": "rlptheme.png"
    },
    "colors": {
      "frame": "#00c4ff",
      "tab_background_text": "#55ff00"
    }
  },
  "version": "2.0",
  "name": "Real Life Plus Theme",
  "manifest_version": 2,
  "description": "Show off your pride for Real Life Plus with this Firefox persona."
}