Firefox 85.0

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  1. Firefox 85.02
  2. Mozilla Firefox 85.0
  3. Firefox 85.0
  4. Firefox Update 2021
Warning: Firefox now includes downgrade protection to prevent corruption of user profile data. If you install an older version, you'll be prompted to create a new Firefox profile.

Native support for macOS devices built with Apple Silicon CPUs brings dramatic performance improvements over the non-native build that was shipped in Firefox 83: Firefox launches over 2.5 times faster and web apps are now twice as responsive (per the SpeedoMeter 2.0 test). Firefox for Android Release January 26, 2021 Version 85.0, first offered to Release channel users on January 26, 2021 We'd like to extend a special thank you to all of the new Mozillians who contributed to this release of Firefox. Firefox for Desktop. Get the not-for-profit-backed browser on Windows, Mac or Linux. Firefox for Android. Firefox Release. February 5, 2021.

If there is a problem with a new version of Firefox, some people may want to downgrade Firefox to a previous version but we do not recommend this. The latest Firefox version includes security updates so downgrading to an older version leaves you more vulnerable to attacks and usually doesn't fix the problem. This article gives you some alternatives to downgrading and links to older versions of Firefox if you do choose to downgrade.

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Problems with an update are usually not caused by the new version of Firefox, but rather the update process. In most cases, installing a previous version will not help. Instead, see:

Note: Other problems can be solved with the Refresh Firefox feature. It restores Firefox to its default state while saving your essential information.

Ensure all security and security-related software is fully updated. Some security software will need to be upgraded to a new version so that it is compatible with each Firefox version update.

Optional software bundled with security software also may need updating. Such software may not be essential for your security but, if outdated, may interfere with the use of Firefox or cause Firefox to crash.

If you still want to downgrade, you can visit Mozilla's directory of older Firefox versions using the links below. Please note, however, that using older versions can make Firefox insecure and more vulnerable to attacks and scams. We recommend that you always use the newest version of Firefox.
Warning: Old Firefox versions pose a significant security risk.
  • Firefox 77.0.132-bit (US English)
  • Firefox 77.0.164-bit (US English)
  • Firefox 77.0.132-bit (US English)
  • Firefox 77.0.164-bit (US English)
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  • Firefox 80.0.132-bit (US English)
  • Firefox 80.0.164-bit (US English)
  • Firefox 80.0.132-bit (US English)
  • Firefox 80.0.164-bit (US English)
FirefoxFirefox 85.0
  • Firefox 81.0.232-bit (US English)
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Firefox
  • Firefox 82.0.332-bit (US English)
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  • Firefox 83.032-bit (US English)
  • Firefox 83.064-bit (US English)
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  • Firefox 83.064-bit (US English)
  • Firefox 84.0.232-bit (US English)
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  • Firefox 85.0.232-bit (US English)
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  • Firefox 85.0.232-bit (US English)
  • Firefox 85.0.264-bit (US English)
  • Firefox 86.0.132-bit (US English)
  • Firefox 86.0.164-bit (US English)
  • Firefox 86.0.132-bit (US English)
  • Firefox 86.0.164-bit (US English)
85.0
  • Firefox 87.032-bit (US English)
  • Firefox 87.064-bit (US English)
  • Firefox 87.032-bit (US English)
  • Firefox 87.064-bit (US English)
Important: By default, Firefox is set for automatic updates. To prevent Firefox from automatically updating itself after you install an older version, you'll need to change your Firefox update settings: In the Menu bar at the top of the screen, click Firefox and select Preferences.Click the menu button and select ... In the General panel, go to the Firefox Updates section.

Instead of downgrading to an older, insecure version of Firefox and changing your update settings, you should consider these alternatives:

Mozilla

Install Firefox Extended Support Release.Firefox Extended Support Release (ESR) is an official version of Firefox developed for large organizations such as universities and businesses. Firefox ESR does not come with the latest features, but it does have the latest security and stability fixes. For more information, see the article Switch to Firefox Extended Support Release (ESR) for personal use.

Use the latest version of another browser. If you are not satisfied with the current Firefox version or it simply is not working right now, there are alternative browsers that you can use to browse the web.

Firefox 85.02

This article is for IT Admins who want to configure Firefox on their organization's computers.

Mozilla Firefox 85.0

You can silently install Firefox for Enterprise using a MSI installer or by using the full installer from the command line.

Firefox 85.0

Silent installation will not open the GUI and instead runs the installation process in the background using all default settings. Some users may prefer silent installation while configuring a new system for example.

Firefox Update 2021

Supported on Windows 7 and later, the MSI installer is a wrapper of the exe full installer that allows users to customize their installation preferences with a MST file prior to deployment. Using an external MSI editor like Orca , you can change the values for a property in your MSI file to enable the silent option for installation. To learn how, read the MSIEXEC options section of this support article . Silent installation is enabled by using the /S option.

Using the full installer from the command line will implicitly enable silent mode. To learn more, see the /S option in this command-line options document about full installer configurations. Silent installation is enabled by the /S option.

To uninstall Firefox for Enterprise silently you have to uninstall from the command line. To do so, run [install directory]uninstallhelper.exe with the command line parameter /S.