Examine source code of CopyCode

{
  "manifest_version" : 2 ,
  "name" : "CopyCode",
  "version" : "1.0",
  "description" : "Adds a copy button to all code regions on all websites.",
  "icons" : {},
  "content_scripts" : [
    {
      "matches" : [
        "<all_urls>" 
      ],
      "js" : [
        "copy_code.js" 
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{43e83ab5-c27e-4397-9e8f-0e0a5fda10ed}"
    }
  }
}