Gecko 1.9 Alpha 2 introduces several new features which can be tested by using Gran Paradiso Alpha 2:

• Core layout code affecting the calculation of widths in tables, floats, and absolutely positioned elements has been rewritten. The code for handling incremental layout of pages (as data arrives over the network, as images load, or as dynamic changes are made) has also been changed extensively. (See the Reflow-Refactoring wiki page for more information.
• Resolved remaining issues with ACID2 test compliance.
• Support for the Web Apps 1.0 API for changing stylesheets.
• The inline-block and inline-table values of CSS 2.1's display property are now implemented.
• XML documents can now be rendered as they're downloaded instead of only after the full document has been loaded.
• Greatly improved Mac widgets support since Alpha 1.
• Improvements in the Cairo graphics layer.

Some of the changes in Gecko 1.9 Alpha 2 will affect the web and platform compatibility of Gran Paradiso Alpha 2:

• Windows 95, Windows 98, and Windows ME are not supported for Gecko 1.9.
• OS X 10.2 is no longer supported, and OS X 10.3.9 or better is required.
• The non-standard JavaScript Script object is no longer supported.
• Moving DOM nodes between documents now requires a call to importNode or adoptNode as per the DOM specification.