What changed in v5.2.4

Web build performance — the browser (WASM) build now generates chunks on worker threads:

WASM threads enabled — the web export switched from the single-threaded template to the threaded one (SharedArrayBuffer), so chunk generation runs across worker threads instead of on the main thread. The browser build was struggling to keep up with chunk generation while driving; this spreads the work the same way the desktop build does.
Cross-origin isolation — threaded WASM requires the page to be cross-origin isolated, so the hosted build now sends Cross-Origin-Opener-Policy: same-origin and Cross-Origin-Embedder-Policy: require-corp on every response. No action needed if you play the hosted build; if you self-host, your static server must send those two headers or the game won't boot.