Examine source code of Best Cookie Editor

{
  "manifest_version": 2,
  "name": "Best Cookie Editor",
  "version": "1.2",
  "description": "View and edit browser cookies in glassmorphism style.",
  "permissions": [
    "cookies",
    "tabs",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1db27e6c-9c07-4769-a337-5bfe6ced6e96}"
    }
  }
}