Performance of the current builds is about on-par with the 32-bit version for most things.If you have a breaking issue with it, please feel free to bugreport it (include as much detail as possible about your system and browser setup - in English!) and grab the 32-bit version for the time being. The main focus of support given will be and remain on the main release builds (32-bit) of the browser. Support for these browsers in case of issues will be limited. Firefox/圆4 (and therefore Pale Moon/圆4) is still under development.

Most notably, if you want Flash, you will need to get the beta/development version of Flash for 64-bit from Adobe Labs.

Many plugins are either not available or not officially released yet for 64-bit browsers.

Windows XP Pro 圆4, Windows Vista 64-bit or Windows 7 64-bit).

You will need an 圆4 Windows Operating System! Just having a 64-bit processor is not enough, you will also have to have a 64-bit version of Windows (i.e.

Therefore, there are some very important things to note before you decide if you want to use an 圆4 build: Most media-plugins are also not available in an 圆4 version.

Unfortunately, there are also some drawbacks, mainly in the areas of compatibility with 32-bit extensions to the browser.

Download pale moon x64 for windows 10