Follow these steps to switch from 32-bit to 64-bit Firefox: Go to this Mozilla Firefox download page and select the Windows 64-bit installer. Download the Firefox Setup file and save it to your computer. Do not run the installer yet. Click the Firefox menu and select Exit.
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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?
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.
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Download from PortableApps.com
Version 81.0.1 for Windows, English
94MB download / 345MB installed
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Mozilla Firefox, Portable Edition can run from a cloud folder, external drive, or local folder without installing into Windows. It's even better with the PortableApps.com Platform for easy installs and automatic updates.
Also Available: Firefox ESR (Extended Support Release), Firefox Developer Edition, Firefox Beta, Firefox Nightly, Legacy versions
- Support Firefox development
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Mozilla Firefox® is a fast, full-featured web browser that's easy to use. It has lots of great features including popup-blocking, tabbed-browsing, integrated search, improved privacy features, automatic updating and more. Plus, thanks to the PortableApps.com launcher bundled in the Mozilla Firefox, Portable Edition, it leaves no personal information behind on the machine you run it on, so you can take your favorite browser along with all your favorite bookmarks and extensions with you wherever you go. Firefox Portable is a dual-mode 32-bit and 64-bit app, ensuring Firefox runs as fast as possible on every PC.
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For help with this app, please see the following:
- External: Publisher Support
- PortableApps.com Forum: Portable App Support
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- Publisher: Mozilla & PortableApps.com (John T. Haller)
- Date Updated: 2020-10-01
- Date Added: 2004-04-16
- System Requirements: Windows 7, 8, 10 & WINE
- App License: Open Source (MPL/GPL/LGPL under Mozilla EULA)
- Source: Firefox, SQLite, Launcher source included, PortableApps.com Installer
- MD5 Hash: 2da4906ca412a6cb9fa6c9b2b1317ab0 (English)
- SHA256 Hash: 672a248cd9f2e0b8026a7604c9b616956eab49733143838c276fafa94aab7717 (English)
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Mozilla®, Firefox® and the Firefox logo are registered trademarks of the Mozilla Foundation and are used under license.