Examine source code of HTTP Headers

{
  "manifest_version" : 2 ,
  "name" : "HTTP Headers",
  "version" : "1.0",
  "description" : "A static reference for HTTP headers with descriptions and security details.",
  "permissions" : [],
  "sidebar_action": {
    "default_panel": "sidebar.html",
    "default_title" : "HTTP Headers"
  },
  "web_accessible_resources" : [
    "headers.json"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2265cc70-0c56-4afc-9262-d5ce93f3c423}"
    }
  }
}