Settings that can be passed to Firestore.enablePersistence() to configure Firestore persistence.
Whether to synchronize the in-memory state of multiple tabs. Setting this to 'true' in all open tabs enables shared access to local persistence, shared execution of queries and latency-compensated local document updates across all connected instances.
To enable this mode,
experimentalTabSynchronization:true needs to be set
globally in all active tabs. If omitted or set to 'false',
enablePersistence() will fail in all but the first tab.
NOTE: This mode is not yet recommended for production use.