Handling Offline Mode in Firefox Browser Extensions

Handling Offline Mode in Firefox Browser Extensions When building extensions that depend on network data — like my Weather & Clock Dashboard — offline handling is critical. Users notice immediately when your extension shows stale data or broken UI. The Problem Browser extensions run at browser startup. If the user is on a train, airplane, or just has spotty WiFi, your fetch calls will fail. Without proper handling, users see errors or empty states. Detecting Online Status The browser gives y