net::ERR_NAME_NOT_RESOLVED

Errnamenotresolved on mobile browsers (Chrome for Android, Safari for iOS) often differs from desktop because mobile browsers impose stricter power management, memory limits, and background execution restrictions. iOS Safari's Intelligent Tracking Prevention (ITP) deletes cookies, localStorage, and IndexedDB for sites not visited in 7 days — this causes Errnamenotresolved for features relying on persistent client-side storage. iOS WKWebView used in all iOS browsers (including Chrome for iOS) has separate cookie storage from Safari, additional restrictions on Service Workers, and older WebKit than desktop Safari. On Android, Chrome's memory pressure handler aggressively discards tabs and their associated Service Workers, caches, and WebSocket connections — reconnection logic is not optional on mobile. Test mobile-specific errors using Chrome DevTools' device emulation mode and remote debugging (connect Android phone via USB, open chrome://inspect). Safari Technology Preview on macOS provides a debugging environment for iOS Safari behavior without requiring a physical device. Most mobile-specific Errnamenotresolved traces to one of these lifecycle or storage differences.