Examine source code of Mini Notes

{
  "manifest_version" : 2 ,
  "name" : "Mini Notes",
  "version" : "1.0",
  "description" : "Quick note-taking extension right in your browser.",
  "browser_action" : {
    "default_popup" : "popup.html",
    "default_icon" : {
      "16" : "icon.png",
      "32" : "icon.png"
    }
  },
  "permissions" : [
    "storage" 
  ],
  "icons" : {
    "16" : "icon.png",
    "32" : "icon.png",
    "48" : "icon.png",
    "128" : "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5b0e54f1-2539-4a53-85ef-88f5c5e6528f}"
    }
  }
}