Changes in Firefox 13:
* When opening a new tab, users are now presented with their most visited pages
* The default home page now has quicker access to bookmarks, history, settings, and more
* SPDY protocol now enabled by default for faster browsing on supported sites
* Restored background tabs are not loaded by default for faster startup
* Smooth scrolling is now enabled by default
* 72 total improvements to Page Inspector, HTML panel, Style Inspector, Scratchpad and Style Editor
* The column-fill CSS property has been implemented
* Experimental support for ECMAScript 6 Map and Set objects has been implemented
* Support for the CSS3 background-position property extended syntax has been added
* The :invalidpseudo-class can now be applied to the element
* The CSS turn unit is now supported

Changes in Waterfox 13.0:
* Compiled with Intel’s C++ Compiler using /O3 /QaxAVX /arch:SSE3 /Qparallel /w
* Implemented Intel’s LibM (Math Library)
* Implemented SSE3 support for all processors and AVX for Intel Sandy Bridge and newer processors
* Reverted back to jemalloc from tcmalloc in preview releases due to a problem occuring
* Disabled auto-updates, own method will be implemented in Waterfox.Next
* Thanks for xunxun1982 for the WebGL crash fix