User blog comment:CzechOut/How Portable Infoboxes Can Change Your Style/@comment-24473195-20160709000750/@comment-24473195-20160709002122

> You are probably more into it than me but, that extension seems to run on MW 1.25?

> Or there are some older versions of that extension compatible with MW 1.19?

Tha'ts not a huge issue. If they are willing to commit the resources (time, money, and effort) wikia can backport that extension to Mediawiki 1.19, especially  considering tha the WMF is personally conducting a security review on it, unlike most other extension which are just created by random developers.