As expected Mozilla has now unveiled the Developer Edition of 64-bit Firefox for Windows (v 38). The 64-bit build allows users to get a more richer, desktop-quality app experience in the web-browser, the 64bit version of the browser allows running of larger applications, better performance, and increased security vs it's 32bit sibling.

As blogged earlier after Internet Explorer and Google Chrome, our beloved Firefox web-browser is also coming with multi-process support. To make things even sweeter Mozilla has also announced an official 64bit version of the web-browser for Windows OS, although this was unofficially available as Waterfox.

Internet Explorer 8 was the very first web-browser to utilize separate processes followed by Google Chrome, the separation of UI and multiple “content” processes to host web-content results in better security and performance. Using separate content processes allows them to be properly sandboxed enhancing security and will also result in better UI responsiveness as the browser UI would not be affected by poor performance of content processes.

Although the underlying Gecko platform on which Firefox runs supports multiple processes, the Firefox frontend is not designed to use them. Work to make the frontend support multiple processes began in early 2013, and fruits of the work are now available in Nightly builds of the browser. The new multi-process Firefox will make it a more stable web-browser, a crash in “content” process will not kill the entire browser and will show something like below telling which tab crashed allowing them to be reloaded.