Examine source code of Hyperlink Extractor

{
  "manifest_version" : 3 ,
  "name" : "Hyperlink Extractor",
  "description" : "Extract and filter all hyperlinks on the current page.",
  "version" : "1.1",
  "action" : {
    "default_title" : "Extract Links"
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "permissions" : [
    "scripting" ,
    "activeTab" 
  ],
  "host_permissions" : [
    "<all_urls>" 
  ],
  "icons" : {
    "16" : "icons/icon-16.png",
    "48" : "icons/icon-48.png",
    "128" : "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "hyperlink-extractor@example.com"
    }
  }
}