Shopify Release notes and new features

Checkout UI extensions now default to non-blocking behavior

As of January 26, 2026, Checkout UI extensions that support blocking now default to non-blocking behavior. To enable blocking, merchants must explicitly activate the Allow app to block checkout setting in the checkout and accounts editor.

• Checkout UI extensions now default to non-blocking behavior
• Let buyers update subscription payment methods without leaving your extension
• New `article_list` input setting for themes