Examine source code of Cookie Remover

{
  "manifest_version": 3,
  "name": "Cookie Remover",
  "version": "1.1.2",
  "browser_specific_settings": {
    "gecko": {
      "id": "{3507f56d-2ef5-45c1-b6d7-5297a0ba7642}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "description": "Removes all cookies and local storage for the current site with one click.",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_icon": "icon-128.png",
    "default_title": "Remove cookies for this site"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "cookies",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "icon-16.png",
        "icon-32.png",
        "icon-48.png",
        "icon-128.png",
        "icon-large.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}