The 'Beta' channel provides improved stability over the 'Nightly' builds and is the first development milestone that has the 'Firefox' logo.

The 'Beta' channel is up to six weeks behind the 'Aurora' build, for up to about twelve weeks compared to the most recent 'Nightly' build. As of version 35, the 'Aurora' channel has been renamed to the 'Developer Edition' channel. The 'Aurora' build is up to six weeks behind 'Nightly' and offers functionality that has undergone basic testing.

The most recent available build is called 'Nightly Builds' and offers the latest, untested features and updates. In April 2011, the development process was split into several 'channels', each working on a build in a different stage of development. 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.Main article: Firefox early version history Rapid releases You can still manually install 64-bit Firefox, if you choose.

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).

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.

Check your Firefox version (in the “About Firefox” window) and look for “(32-bit)” or “(64-bit)” after the version number: If you’re running 64-bit Windows ( here’s how to check), your Firefox may already be 64-bit. Linux and macOS users, fret not, you already enjoy a Firefox that’s optimized for 64-bit. 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. Here’s the key thing to know: 64-bit applications can access more memory and are less likely to crash than 32-bit applications. What’s the difference between 32-bit and 64-bit? How much less? In our tests so far, 64-bit Firefox reduced crashes by 39% on machines with 4GB of RAM or more. That means you get a more secure version of Firefox, one that also crashes a whole lot less. Users on 64-bit Windows who download Firefox can get our 64-bit version by default.

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