Users on 64-bit Windows who download Firefox can get our 64-bit version by default. That means you get a more secure version of Firefox, one that also crashes a whole lot less. How much less? In our tests so far, 64-bit Firefox reduced crashes by 39% on machines with 4GB of RAM or more.

What’s the difference between 32-bit and 64-bit?

Sep 11, 2020.

Here’s the key thing to know: 64-bit applications can access more memory and are less likely to crash than 32-bit applications. Also, with the jump from 32 to 64 bits, a security feature called Address Space Layout Randomization (ASLR) works better to protect you from attackers. Linux and macOS users, fret not, you already enjoy a Firefox that’s optimized for 64-bit.

How do you get 64-bit Firefox?

If you’re running 64-bit Windows (here’s how to check), your Firefox may already be 64-bit. Check your Firefox version (in the “About Firefox” window) and look for “(32-bit)” or “(64-bit)” after the version number:

• If you see “(32-bit)” and you are running Firefox 56.0 or older, updating to the latest Firefox version should automatically upgrade you to 64-bit.
• If you see “(32-bit)” and are running Firefox 56.0.1 or newer, then your computer may not meet the minimum memory requirement for 64-bit (3 GB RAM or more). You can still manually install 64-bit Firefox, if you choose.

If you need to run 32-bit Firefox or manually install 64-bit Firefox, you can simply download and re-run the Windows (32-bit or 64-bit) Firefox installer from the Firefox platforms and languages download page.

Get the Firefox Extended Support Release or Rapid Release browser for comprehensive data security and data protection.

Firefox 64 Bit For Windows

Unmatched data protection — on the release cadence that suits you

• Your data stays your business

  The Firefox browser is open source, provides Enhanced Tracking Protection and soon will support DNS over HTTPS — all part of our longstanding commitment to data protection.

• Deploy when and how you want

  With install packages and a wide expansion of group policies and features, deployment is faster and more flexible than ever — and a breeze in Windows and macOS environments.

• Choose your release cadence

  Get rapid releases to make sure you get the latest features faster, or go extended to ensure a super stable experience.

Enterprise downloads

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