Examine source code of GitHub Clone Helper

{
  "manifest_version" : 2 ,
  "name" : "GitHub Clone Helper",
  "version" : "1.0",
  "description" : "Adds 'git clone' before HTTPS and SSH clone URLs on GitHub.",
  "icons" : {
    "48" : "images/icon48.png",
    "128" : "images/icon128.png"
  },
  "permissions" : [
    "clipboardWrite" ,
    "activeTab" 
  ],
  "browser_action" : {
    "default_icon" : {
      "16" : "images/icon16.png",
      "48" : "images/icon48.png",
      "128" : "images/icon128.png"
    }
  },
  "content_scripts" : [
    {
      "matches" : [
        "https://github.com/*" 
      ],
      "js" : [
        "contentScript.js" 
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2ced4404-8a4e-4992-9517-6512a0919867}"
    }
  }
}