This version added a touch-friendly on-screen keyboard for devices running Windows 8 or later when a text input field is selected. Performance: 32-Bit vs. 64-Bit
While the 64-bit version offers "sweetness" in terms of modern capabilities, it isn't always the fastest choice for every machine. 32 vs 64 bit | Firefox Support Forum
Mozilla Firefox 43 , released on December 15, 2015, marked a historic milestone for the browser by being the first version to offer an official, stable . While 64-bit versions had existed for Linux and Mac for years, this release finally allowed Windows users to leverage modern hardware more effectively. Key Features of Firefox 43 (64-Bit) mozilla firefox 43 64 bit download
The 64-bit version provides superior Address Space Layout Randomization (ASLR) . This security feature makes it significantly harder for attackers to exploit memory-based vulnerabilities by constantly changing where data is stored in the RAM.
Unlike the 32-bit version, which was capped at 4GB of RAM, the 64-bit build can access virtually all available system memory. This is critical for power users who keep hundreds of tabs open or run heavy web applications like browser-based games. This version added a touch-friendly on-screen keyboard for
Version 43 introduced an improved Private Browsing mode that allowed users to block additional third-party trackers that could monitor their activity across the web.
The shift to a 64-bit architecture was about more than just a number; it fundamentally changed how the browser handled data and security. 32 vs 64 bit | Firefox Support Forum
For the first time, users could opt to see search suggestions directly within the address bar (Awesome Bar) as they typed.