At other times, you will have to install specific software to access the contents of a work, The system will inform us which is the best (for example, DjVu).

On the other hand, some online libraries might oblige you to use a browser with Java to see the documents. This does not depend on the BVFE, but on the library where the document has been digitized. If you have problems viewing some of the works, we recommend that you verify whether your browser supports Java. Check your preferences and make sure Java is active.

You should also take into account that depending on your browser's security settings, you may have to configure the address of the library as safe, or reduce the security level in order to see the work you have searched for, or all of the works in the library.