Examine source code of Hammermaps Community skin

{
  "theme": {
    "images": {
      "theme_frame": "header_firefox1.png"
    },
    "colors": {
      "frame": "#5e5e5e",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Hammermaps Community skin",
  "manifest_version": 2,
  "description": "www.Hammermaps.de Community skin\nI hope you will enjoy my skin.\n\nvisit www.Hammermaps.de"
}