Examine source code of PR Tracker

{
  "manifest_version" : 2 ,
  "name" : "PR Tracker",
  "description" : "Track and manage your GitHub pull requests",
  "version" : "1.0.20",
  "icons" : {
    "16" : "/icons/icon-16.png",
    "32" : "/icons/icon-32.png",
    "48" : "/icons/icon-48.png",
    "128" : "/icons/icon-128.png"
  },
  "permissions" : [
    "storage" ,
    "notifications" ,
    "alarms" ,
    "https://api.github.com/*" 
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{dabd690e-283a-4c0a-98de-3fc963365d13}"
    }
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "browser_action" : {
    "default_title" : "PR Tracker",
    "default_popup" : "popup.html"
  }
}