UI extensions using API version 2025-10 or later are limited to a 64 KB compressed JavaScript bundle per extension. Full page customer account extensions may use up to 128 KB.
Summary extracted from the official source text. Verify details on the source page.
| Platform | Shopify |
|---|---|
| Effective date | No date published |
| Precision | n/a |
| Published | 2026-09-17 |
| Categories | Breaking / action requiredPolicy |
| Tags | API, Admin Extensions, Checkout UI, Customer Accounts, POS Extensions, Update |
| Official source | Shopify developer changelog ↗ |
| Fetched | 2026-10-17T03:44:00+00:00 |
| First seen | 2026-10-17T01:05:46+00:00 |
| Status | Listed by the source |
| Stable ID | shopify-4cebe104f2 · JSON |