Description:

The project currently includes or references a cache.appcache file, which is deprecated and no longer supported in most modern browsers, including Chrome. The Application Cache (AppCache) feature has been removed due to serious limitations and security issues.

According to Chrome Developer Lighthouse Best Practices, continuing to use AppCache may negatively impact site performance and compatibility. Lighthouse flags its presence as a best practice violation.

We have already migrated to using a modern Service Worker for offline functionality, as seen in sw.js. Therefore, the legacy AppCache file is no longer needed and should be removed to avoid confusion and ensure best practices.

Recommended Action:

1. Remove all references to cache.appcache from the HTML or server configuration.
2. Delete the cache.appcache file from the codebase.