The Joomla 3.3 release introduces new features into the CMS such as improved password hashing and microdata and optimizes the code with performance improvements to the routing system and the continued conversion of MooTools based JavaScript to jQuery. More than 115 bugs have also been resolved with the 3.3 release of the Joomla! CMS.

For Joomla 3.3, the minimum PHP version is 5.3.10, which substantially enhances the level of cryptography that can be used for securing passwords.

Joomla! 3.3 continues replacing MooTools based JavaScript with their jQuery equivalents. There are a number of benefits, from make your site load faster by reducing the size of your Joomla! web site by loading just jQuery, as well as Joomla! access to all the jQuery goodness.

Microdata Implementation: Web semantics are moving forward with the aim of making a more useful web which will relate everything on the web by "meaning" in addition to raw "textual data". This feature allows many aspects of the content rendered by the Joomla! CMS to be explained to search engines using semantic information. For example, breadcrumbs can be marked up as such, and used in search results to give a visual representation of topics and categories.