Waterfox is a high performance browser based on the Mozilla Firefox   source code. This code is taken and compiled to run specifically for   64-Bit Windows computers. To make Waterfox stand out a bit more, it’s   compiled with optimizations so that it will run more efficiently and   faster than just compiling Firefox as a 64-Bit program. Having been   compiled specifically for this type of system, its performance is  better  than the standard version of Firefox. Icons and names aside,  Waterfox  is identical to Firefox, and is updated each time you do the  main  version, with the difference that your executable has been  compiled for  x64 and Windows systems. Waterfox was compiled with  Intel’s C++ Compiler  with the following optimisations: Intel’s Math  Library, SSE3, AVX for  supported Intel processors, jemalloc,  Profile-Guided Optimisation and  the /O3 switch.Your add-ons/extensions  work on any version of  Firefox, on any platform! That means they all  work with Waterfox. On the  other hand, only 64-Bit plugins work with  Waterfox and as of now those  are: Adobe Flash, Oracle Java and  Microsoft Silverlight.
Waterfox  is based on the current stable Firefox build, which means it  functions  in exactly the same way. Aside from its name on the menu at  the top of  the main window, there’s nothing to differentiate it from  Firefox.  Waterfox shares your Firefox settings, so should you come to  uninstall  it, don’t select the option to delete all personal  information if you’re  still using Firefox.
Waterfox Features:
 • Compiled in Intel’s C++ Compiler
 • Intel’s Math Library
 • Streaming SIMD Extensions 3
 • Advanced Vector Extensions
 • Jemalloc
 • Profile-Guided Optimisation
 • /O3 Switch
 • 100% Extension Compatibility
 • 64-bit Plugin Support
 • Future Proof!
You MUST have Visual C++ 2010 Redistributable Package (x64) installed! Download it here.

Waterfox 35.0 Release
Posted by Alex on Tuesday, January 20, 2015 07:59:13 PM UTC +0000 

 Waterfox 35.0 is now available for download!
 What’s new in 35.0 (Waterfox)
 Fixed Mega.co.nz crashes and any other services that use similar Java****** function
 Fixed corrupt previews when using the upload dialogue box
 Switched to Intel Threaded Building Blocks memory allocator due to issues with tcmalloc not registered its DLL correctly.
 What’s new in 35.0 (Firefox)
 Firefox Hello with new rooms-based conversations model
 New search UI improved and enabled for more locales
 Access the Firefox Marketplace from the Tools menu and optional toolbar button
 Built-in support for H264 (MP4) on Mac OS X Snow Leopard (10.6) and newer through native APIs
 Use tiled rendering on OS X
 Improved high quality image resizing performance
 Improved handling of dynamic styling changes to increase responsiveness
 Added support for the CSS Font Loading API
 Resource Timing API implemented
 CSS filters enabled by default
 Changed Java****** ’let’ semantics to conform better to the ES6 specification
 Support for inspecting ::before and ::after pseudo elements
 Computed view: Nodes matching the hovered selector are now highlighted
 Network Monitor: New request/response headers view
 Added support for the EXTblendminmax WebGL extension
 Show DOM Properties con**** menu item in inspector
 Reduced resource usage for scaled images
 PDF.js updated to version 1.0.907
 Non-HTTP(S) XHR now returns correct status code
 How do I get this update?
 It should be available immediately and can be applied by clicking the Menu Icon > ? > About Waterfox or
 Download from the front page