Waterfox is a 64-Bit version of Firefox. The Firefox source 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. Waterfox was the first community Firefox builds to release a 64-Bit version of Firefox 4 when it first came out. Features include streaming SIMD extensions 3, advanced vector extensions, Jemalloc, and profile-guided optimization.
What's new in this version:
Version 18.0.1 has fixed some bugs.