Examine source code of Rate It!

{
  "name" : "Rate It!",
  "description" : "Rate and discuss every Website you can find.",
  "version" : "2.0",
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "manifest_version" : 2 ,
  "permissions" : [
    "storage" ,
    "tabs" ,
    "identity" ,
    "https://rateit.timon-gaertner.ga/*" 
  ],
  "content_scripts" : [
    {
      "matches" : [
        "https://www.youtube.com/*" 
      ],
      "js" : [
        "jquery.js" ,
        "content_script_incection_rateIt.js" ,
        "youtubeVideo.js" 
      ],
      "run_at" : "document_idle" 
    }
  ],
  "browser_action" : {
    "default_popup" : "extension-popup/index.html",
    "default_icon" : {
      "16" : "/logos/rateItLogo16.png",
      "32" : "/logos/rateItLogo32.png",
      "48" : "/logos/rateItLogo64.png",
      "128" : "/logos/rateItLogo128.png"
    }
  },
  "icons" : {
    "16" : "/logos/rateItLogo16.png",
    "32" : "/logos/rateItLogo32.png",
    "48" : "/logos/rateItLogo64.png",
    "128" : "/logos/rateItLogo128.png"
  }
}