Manual:$wgExternalLinkTarget/es

Detalles
Set a default target for external links. If set to e.g. "_blank", this will also set the "noreferrer" and "noopener" link rel to prevent the attack described at https://mathiasbynens.github.io/rel-noopener/. Some older browsers may not support these link attributes, hence setting $wgExternalLinkTarget to _blank may represent a security risk to some of your users.

Add the following entry to file in order to open links in a new window / tab.

Si el valor es FALSE, entonces no se usa ningún atributo de destino con los enlaces externos, con lo cual es lo mismo que usar.