Checkout Firewall includes the Freemius WordPress SDK 2.13.4.

Copyright (c) 2015–2026 Freemius, Inc.
Licensed under the GNU General Public License, version 3 only.
The complete license text is included at vendor/freemius/wordpress-sdk/LICENSE.txt.

Checkout Firewall also bundles IBM Plex Sans and IBM Plex Mono font files.
Their SIL Open Font License is included at assets/fonts/OFL.txt.

Checkout Firewall also bundles ALTCHA widget 3.2.1 for the private local
proof-of-work browser check.

Copyright (c) 2023–2026 ALTCHA.org
Licensed under the MIT License.
The complete license text is included at assets/vendor/altcha/LICENSE.txt.
