Examine source code of Miniscripts

{
  "name" : "Miniscripts",
  "version" : "1.1.1",
  "description" : "Save scripts to run on any page",
  "icons" : {
    "16" : "res/icon_16.png",
    "32" : "res/icon_32.png",
    "48" : "res/icon_48.png",
    "128" : "res/icon_128.png"
  },
  "browser_action" : {
    "default_icon" : "res/icon_16.png",
    "default_popup" : "popup.html"
  },
  "options_page" : "options.html" ,
  "background" : {
    "scripts" : [
      "js/background.js" 
    ],
    "persistent" : false 
  },
  "permissions" : [
    "storage" ,
    "activeTab" ,
    "notifications" 
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "miniscripts@mkps.app"
    }
  },
  "manifest_version" : 2 
}