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#MOZILLA FIREFOX DEVELOPERS HOW TO#
#MOZILLA FIREFOX DEVELOPERS INSTALL#

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. 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. Description Mozilla developers and community members Gabriele Svelto, Andrew McCreight, the Mozilla Fuzzing Team, Sean Feng, and Sebastian Hengst reported memory safety bugs present in Firefox 113 and Firefox ESR 102.11.

Check your Firefox version (in the “About Firefox” window) and look for “(32-bit)” or “(64-bit)” after the version number: You can open the Firefox Developer Tools from the menu by selecting Tools > Web Developer > Toggle Tools or use the keyboard shortcut Ctrl + Shift + I or F12 on.

#MOZILLA FIREFOX DEVELOPERS HOW TO#

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. WebDriver conformance (Marionette) Marionette will no longer be enabled unless the -marionette command line argument or the MOZMARIONETTE environment variable is specified. Here’s the key thing to know: 64-bit applications can access more memory and are less likely to crash than 32-bit applications. DOM Code can now use the new static method AbortSignal.abort () to return an AbortSignal that is already set as aborted ( Firefox bug 1698468 ).

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. Last Updated: Article History Table of Contents Firefox, in full Mozilla Firefox, free open-source Web browser created by the American software company Mozilla Corporation. Users on 64-bit Windows who download Firefox can get our 64-bit version by default.