This is what Claude.ai says:
Update: this seems to be hallucination, see below.
IndexedDB Storage Limits in Mobile Browsers
The storage limits for IndexedDB in mobile browsers vary by browser and device, but here are the general guidelines:
iOS (Safari)
- Storage Limit: Approximately 50MB per origin
- Apple implements a shared pool of storage (1GB maximum) across all web storage technologies
- After 7 days of non-use, data may be purged
Android Chrome
- Storage Limit: Typically up to 60% of available disk space
- Chrome implements a “soft limit” of around 80MB per origin, but can request more
- Uses the “Storage Manager API” to request persistent storage
Firefox for Mobile
- Storage Limit: Approximately 50-100MB per origin
- Can vary based on device storage availability
General Notes:
- These limits can change with browser updates
- Users can manually clear storage at any time