Examine source code of Clear Domain Data

{
  "manifest_version": 2,
  "name": "Clear Domain Data",
  "version": "0.0.2",
  "description": "Configure a list of domains, then press F9 to clear cookies and site data for those domains. Click the toolbar button to manage your domain list.",
  "permissions": [
    "cookies",
    "browsingData",
    "storage",
    "notifications",
    "<all_urls>"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "clear-domain-data@jkomoroski",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "id": "clear-domain-data@jkomoroski",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Clear Domain Data"
  },
  "commands": {
    "clear-cookies": {
      "suggested_key": {
        "default": "F9"
      },
      "description": "Clear cookies for configured domains"
    }
  }
}