---
title: "15.15.0: Reliability fixes for Vite 8, multi-origin tests, and Firefox"
url: "https://www.cypress.io/releases/15-15-0"
description: "React component specs no longer register every test block twice when using Vite 8, a regression that affected all component testing workflows on the current…"
---

# 15.15.0: Reliability fixes for Vite 8, multi-origin tests, and Firefox

ReleasedReleased on May 11, 2026

React component specs no longer register every test block twice when using Vite 8, a regression that affected all component testing workflows on the current Vite major. This release also resolves `cy.origin()` failures after test isolation, adds retry logic for transient Firefox launch failures, and updates the `socket.io` and `uuid` dependencies. It also deprecates `cy.end()`; start a new command chain off `cy` instead, ahead of its removal in a future release.

[Read the changelog](https://docs.cypress.io/app/references/changelog?utm_source=release-card&utm_medium=cypress.io#15-15-0)