# Known Limitations

Understanding Curtain's limitations helps you plan your maintenance strategy effectively:

### Cache Dependencies

```
The timer feature relies on your cache system. If using file cache,
ensure proper file permissions. For distributed systems, a centralized
cache like Redis is recommended.
```

### Template Restrictions

```
Custom templates must extend the base template and include required
components (countdown, status). While you have full control over styling,
the core structure must be maintained for proper functionality.
```

### Browser Compatibility

```
While Curtain works across all modern browsers, some visual effects
(like backdrop-blur) might not work in older browsers. Always test
your templates across different browsers and devices.
```
