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Downgrade and Install Older Version of the Firefox browser

The Firefox Developer regularly releases updates with new enhancements and bug fixes; however, for any reason, if the new version is not working as expected, then you can downgrade to the previous build.

You can download an older Firefox build from the online repository, install it on the computer, and disable the automatic update option from the settings. It’s generally not recommended to stay on the older version.

Step 1: Download the Previous Firefox Build

Mozilla Firefox automatically archives the order builds or releases in an online repository that we can download for free. We can browse through the build number to download the required version.

  1. Open the Firefox directory listings on the web browser.
    Firefox Release Directory Official SiteIt hosts older browser builds, some dating from 5-6 years old.
  2. Please scroll to the version of your choice and select it.
    You should now see various builds of Firefox corresponding to your OS.
  3. Choose the directory per your system configuration. (say, Windows)
    Furthermore, you will see two different architectures*, 32-bit and 64-bit, under Windows.
  4. Select the one that matches your CPU architecture.
    Firefox Version and Architecture Directory in FTP
  5. Select your language and region. As for this guide, we are choosing English US, so it translates to en-US.
    Firefox FTP Release Directory Language Folder
  6. Finally, download the .exe file corresponding to your selected version.
    Link to Download Older Version of Firefox browser
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Pro-tips: If you aren’t sure about system architecture, tap on the More horizontal 3-bar icon menu at the extreme right of Firefox. Then go to Help > About Firefox, and you should find the architecture mentioned there.

Firefox Browser Version and Architecture

Step 2: Install the Older Version for Firefox app

Now that the older version has been downloaded to local storage. We can proceed to install and overwrite the older version over the current installation. Here are the steps to follow:

  1. Double-click on the downloaded .exe file to launch the setup file.
  2. Click on the Next in the welcome screen and select the setup type, out of Standard or Custom.
    Firefox Setup Window Next buttonIf you aren’t sure if the same, then go ahead with the Standard one.
    It will now scan for the installation directory and find the location where the existing version is stored.
  3. You must hit the Upgrade button and wait for the process to complete.
    Upgrade Firefox existing version

That’s it. You have successfully downgraded to an earlier build of Firefox. There’s just one thing left to do- disable its Auto-Updates feature.

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Note: If the older build is unable to overwrite the latest Firefox version, then you should uninstall the Firefox browser from your computer and install the downloaded version.

Step 3: Disable the Automatic Updates

By default, Firefox checks for the latest updates and, if found, will download and install it automatically. At the same time, it may be useful in the general scenario but not under the current circumstance where you have manually downgraded to an earlier build. Here are the steps to disable updates:

  1. Launch the Firefox app on the computer.
  2. Click on the More horizontal 3-bar icon menu and select Options from the menu list.
    Firefox Options menuIt will open the General section in Firefox.
  3. Please scroll to the Firefox Updates section and select Check for Update but let you choose to install them.
    Disable Firefox Auto Update

You should also disable the checkbox for Use a background service to install updates option.

It will disable the automatic updates on the Firefox browser. Though this will check for the newer version, it won’t install unless you manually confirm to update.

It’s not recommended to stay on the older version for a long; successive versions can have the fix or patch release for the issue you are facing. Hence, keeping your Firefox browser up to date is highly recommended.

Bottom Line

So this was all from this guide on downgrading and installing an older Firefox browser version. While the general rule of thumb states that you should always be on the latest build, you might have to deviate from this route in some instances.

The Firefox has the repository for all the builds, that you can download and downgrade.

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Kushal Azza

Kushal Azza

Kushal Azza is a Google Certified Analytics & IT Professional, Digital Content Creator, and Go-To Digital Marketer with an Engineering Degree. He has over a decade of experience solving tech problems, troubleshooting, and innovating digital solutions. Follow him on Twitter and LinkedIn.

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