Advanced mode rewrite plugin aka. AMR provides rewriting of default CONTENIDO url's to SEO friendly url's.
AMR is high configurable plugin, you can set how your url should looks like.
Example: show language in url or url ending with index.html etc.
Always activate this plugin after CONTENIDO installation. Url's looks nicer and human readable.
Url without AMR: www.some-url/cms/front_content?idart=1&lang=3
Url with AMR: www.some-url/cms/myniceurlcat/myniceurlart/index.html