Overview of the Change
Shopify is making an important update to enhance storefront and checkout performance. As of August 18, 2025, the `_ab` cookie will no longer be set on merchant storefronts or checkout pages.
Why Is Shopify Removing the `_ab` Cookie?
The `_ab` cookie was primarily used to enable or disable the theme preview bar functionality. However, Shopify has introduced a more efficient method for previewing themes, rendering the cookie obsolete. This change aims to streamline operations and reduce unnecessary data usage.
How to Preview Themes Without the `_ab` Cookie
Merchants can continue previewing themes without the `_ab` cookie by appending the pb=0 parameter to the URL. This allows for hiding the preview bar while viewing themes effectively.
Action Steps for Shopify Merchants
- Review any processes or tools that rely on the `_ab` cookie and update them accordingly.
- Use the
pb=0URL parameter when previewing themes to ensure optimal functionality. - Stay informed about Shopify updates and enhancements by visiting the Shopify blog and developer documentation.
Conclusion
This change reflects Shopify's commitment to improving merchant experiences and optimizing their storefronts. By taking these simple steps, merchants can ensure a smooth transition without disruption.