Waterfox是一个纯64位版的火狐浏览器，它使用Firefox官方源码，专门为64位Windows操作系统优化编译而成。Waterfox内置了最新Flash、Java和Silverlight插件的64位版本。支持任何官方火狐支持的扩展。Mozilla的官方解释为“The fastest 64-bit variant of firefox!”也就直观地理解为64位系统下的Firefox。
Waterfox 水狐浏览器紧跟Firefox的更新步伐，最新版的Waterfox 24.0 已经可以下载了。Mozilla的Firefox虽然版本更新极快，但64位版本却始终步履蹒跚，而且它非常早期和不稳定，对于64位系统的朋友们来说用什么来提升浏览器性能呢，答案是Waterfox。
Changes in Firefox 24.0:
* Built-in PDF viewer
* Canvas elements can export their content as an image blob using canvas.toBlob()
* Startup performance improvements (bugs 715402 and 756313)
* Experience better image quality with our new HTML scaling algorithm
* Debugger now supports pausing on exceptions and hiding non-enumerable properties
* Remote Web Console is available for connecting to Firefox on Android or Firefox OS (experimental, set devtools.debugger.remote-enabled to true)
* There is now a Browser Debugger available for add-on and browser developers (experimental, set devtools.chrome.enabled to true)
* Web Console CSS links now open in the Style Editor
* CSS @page is now supported
* CSS viewport-percentage length units implemented (vh, vw, vmin and vmax)
* CSS text-transform now supports full-width
* Certain valid WebGL drawing operations are incorrectly rejected, leaving incomplete rendering in affected pages (825205)
* Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode (802274)
* Plugins stop rendering when the top half of the plugin is scrolled off the top of the page, in HiDPI mode (825734)
* Per-window Private Browsing. Learn more.
* New download experience. Learn more.
* Ability to close hanging plugins, without the browser hanging
* Continued performance improvements around common browser tasks (page loads, downloads, shutdown, etc.)
* Continued implementation of draft ECMAScript 6 – clear() and Math.imul
* New JavaScript Profiler tool
* getUserMedia implemented for web access to the user’s camera and microphone (with user permission)
* ‘canvas’ now supports blend modes
* Various ‘audio’ and ‘video’ improvements
* Details button on Crash Reporter (793972)
* Unity plugin doesn’t display in HiDPI mode (829284)
* The Social API now supports multiple providers
* Enhanced three-state UI for Do Not Track (DNT)
* Firefox will suggest how to improve your application startup time if needed
* Preliminary implementation of Firefox Health Report
* Ability to restore removed thumbnails on New Tab Page
* CSS -moz-user-select:none selection changed to improve compatibility with -webkit-user-select:none (bug 816298)
* Graphics related performance improvements
* Removed E4X support from Spidermonkey
* Implemented Remote Profiling
* Integrated add-on SDK loader and API libraries into Firefox
* Added support for ‘main’ element
* Implemented scoped stylesheets
* Added support for ‘window.crypto.getRandomValues’
* Some function keys may not work when pressed (833719)
* Browsing and Download history clearing needs unification to avoid confusion on clearing download history
* WebRTC is now enabled by default!
* Windows: Firefox now follows display scaling options to render text larger on high-res displays
* HTML5 audio/video playback rate can now be changed
* Social services management implemented in Add-ons Manager
* asm.js optimizations (OdinMonkey) enabled for major performance improvements
* Improved WebGL rendering performance through asynchronous canvas updates
* Plain text files displayed within Firefox will now word-wrap
* For user security, the |Components| object is no longer accessible from web content
* Pointer Lock API can now be used outside of fullscreen
* CSS3 Flexbox implemented and enabled by default
* New Web Notifications API implemented
* Added clipboardData API for JavaScript access to a user’s clipboard
* New built-in font inspector
* New HTML5 ‘data’ andelements
* Various security fixes
* Scrolling using some high-resolution-scroll aware touchpads feels slow (829952)
* Mixed content blocking enabled to protects users from man-in-the-middle attacks and eavesdroppers on HTTPS pages
* Options panel created for Web Developer Toolbox
* “Enable JavaScript” preference checkbox has been removed and user-set values will be reset to the default
* Improved about:memory’s functional UI
* Simplified interface for notifications of plugin installation
* Enabled DXVA2 on Windows Vista+ to accelerate H.264 video decoding
* Users can now switch to a new search provider across the entire browser
* CSP policies using the standard syntax and semantics will now be enforced
* (input type=’file’/) rendering improvements (see bug 838675)
* Replace fixed-ratio audio resampler in webrtc.org capture code with Speex resampler and eliminate pseudo-44000Hz rate
* “Load images automatically” and Always show the tab bar” checkboxes removed from preferences and reset to defaults
* HTML5 (input type=”range”/) form control implemented
* Write more accessible pages on touch interfaces with new ARIA role for key buttons
* Social share functionality
* Added unprefixed requestAnimationFrame
* Implemented a global browser console
* Dropped blink effect from text-decoration: blink; and completely removed ‘blink’ element
* New feature in toolbox: Network Monitor
* Implemented Close tabs to the right
* Social: Ability to tear-off chat windows to view separately by simply dragging them out
* Accessibility related improvements on using pinned tabs
* Removed support for Revocation Lists feature
* Performance improvements on New Tab Page loads
* Major SVG rendering improvements around Image tiling and scaling
* Improved and unified Browser console for enhanced debugging experience, replacing existing Error console
* Removed support for sherlock files that are loaded from application or profile directory
* Replace fixed-ratio audio resampler in webrtc.org capture code with Speex resampler and eliminate pseudo-44000Hz rate
* Various security fixes
下载地址：http://sourceforge.net/projects/waterfoxproj/files/latest/download