- Edge 5.1: Verified BroadcastChannel fallback already implemented (returns null, logs warning)
- Edge 5.2: Created safe storage utility for localStorage/sessionStorage
- safeLocalStorage and safeSessionStorage automatically fall back to in-memory storage
- Handles private browsing mode and quota exceeded errors gracefully
- Tests availability before use
- Logs warnings when fallback is used
- Provides utility functions to check support
- Improves reliability in all browser environments
