Firefox not installing for some reason – error [Solved]

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Updated:

Posted: February 2022

  • When the Firefox installer remains stuck on now installing, you should bank check your temporary files or the privileges of your Windows account.
  • If you're getting the For some reason we could not install Firefox message, check if the browser is not already open.
  • Make sure your antivirus or Windows Defender is not the consequence if Firefox won't install.
  • If Firefox is not installing, consider switching to another great browser, faster, and more than secure.

Firefox not installing for some reason

Some users probably encountered various issues when trying to install Mozilla Firefox on their PC. If you are one of them, do not be demoralized.

In this article, we'll offering you a list of the most common installation problems for Mozilla Firefox too every bit solutions to most error messages.

Before trying the troubleshooting steps, let usa tell y'all a few more tips when encountering similar issues:

  • Hmm, for some reason we could not install Firefox – There are times when the installation procedure does non complete and users get this message. If that's your case too, note that y'all can't have Firefox running during installation.
  • Firefox not installing on Windows 10 – If you've tried to install Firefox to no avail, check the setting to Prevent Accessibility Services from accessing your browser from the Privacy & Security panel.
  • Cannot install/reinstall Firefox keeps saying an old copy is running? – Uninstalling the old re-create first isn't always enough. Also, go rid of any leftovers and stubborn software with the assist of the best uninstaller tools.
  • Firefox installer stuck on now installing – This is a mutual problem with Firefox, and it's usually acquired by your temporary files. To gear up information technology, change the permissions of the Temp folder and check if that helps.
  • Firefox won't install Windows 10 – This issue can sometimes be caused by your antivirus. To fix it, disable your antivirus and check if that helps.
  • Firefox install stuck on downloading, housekeeping – Sometimes this result tin appear while trying to install Firefox using the standard installer. Co-ordinate to users, the solution is to download and utilize the full installer.
  • Firefox install takes forever – If your Firefox installation is slow, you might be able to fix the problem simply by trying to run it every bit an administrator. After doing that, check if the issue is still there.

How tin I fix Firefox is not installing for some reason?

1. Consider switching to Opera

When Firefox fails to install and you lack the time or experience to apply the below steps, switching to Opera is the commencement thing to do.

Nosotros won't get into a detailed description here, but suffice to say, no installing errors could show upwards if making such a choice.

Besides that, chances are to appreciate the additional functionality of Opera. Unlike Firefox, Opera is notable for its free and unlimited VPN, useful unit of measurement converters, and visual bookmark.

On height of these, expect to enjoy customizable Speed Dial, which consists of pinned tiles on your home screen.

Opera

Opera installs easily, offers sidebar extensions and even a built-in newsreader. That's why information technology's a worthy alternative to Firefox.

ii. Reinstall Firefox

Sometimes you won't be able to update Firefox at all, and your Firefox install might get stuck with Failed to read the configuration file. Please contact your arrangement ambassador message.

If this happens, your mozilla.cfg file might be damaged, and in order to ready the problem, it's advised to reinstall Firefox. Firstly, go to Programs and Features from Command Panel and uninstall Firefox.

In addition to uninstalling the application, you also have to remove all leftover files from Firefox's installation directory.

Doing this manually tin can exist a boring chore, therefore it's always ameliorate to employ an uninstaller software tool such as IObit Uninstaller. For more details, read our complete guide on how to use IObit.

3. Cheque your permissions

  1. Printing Windows Key + R and enter %localappdata%. Printing Enter or click OK.
    Hmm for some reason we could not install Firefox
  2. Locate Temp binder, right-click it and choose Properties from the menu.
    Firefox install takes forever
  3. Select the Security tab from the top menu and click Edit.
    Firefox installer stuck on now installing
  4. Click on Add together.
    Firefox won't install Windows 10
  5. In the white box write the word Users / click OK.
    Hmm for some reason we could not install Firefox
  6. Select Users from the Group or user names list and cheque Total control in Allow column.
  7. Now click Use and OK to salve changes.Firefox installer stuck on now installing
  8. In addition to changing the permissions, some users are suggesting clearing all directories from the Mozilla updates folder.
  9. Get to the AppDataLocal directory.
  10. Now navigate to the Mozilla updates directory.Firefox won't install Windows 10
  11. If you encounter any folder in at that place, remove them and endeavor to update Firefox once again.

Note: This trouble occurs after a change of permission in the Temp folder for some software. To fix that, follow the higher up steps. After making these changes, try to install Firefox again.

4.  Endeavor to update the browser manually

  1. Click the Menu icon in the meridian right corner and choose Help from the menu.
    Hmm for some reason we could not install Firefox
  2. Now click Most Firefox.
    Firefox install stuck on downloading
  3. A new window volition now announced and Firefox will bank check for updates. If any updates are available, they will exist automatically installed.
    Firefox install takes forever

Theoretically, Firefox is set to automatically install the updates, but sometimes various factors may foreclose that. To cheque for updates manually, exercise the following:

five. Run Firefox as an Administrator

If Firefox install gets stuck on your PC, perhaps the consequence might be related to the missing privileges. To fix this event, it'due south required to run the setup file as an ambassador.

Firefox installer stuck on now installing

This is quite unproblematic, and to practise it, you lot just need to locate the setup file, right-click information technology and choose Run equally administrator.

If you're having issues updating Firefox, you just need to repeat these steps for firefox.exe and and so try to update it once more.

vi. Check your security software

If Firefox install gets stuck on your Windows 10 PC, the upshot might be your security software.

Sometimes certain antivirus features can interfere with your organisation, so it's advised to disable these features. Here'southward how to do that in many popular antivirus tools:

Avast

Here's how to disable the secure connection characteristic from this antivirus:

  1. Open up the dashboard of Avast.
  2. Click on Settings > Active Protection > Customize.
  3. Uncheck the Enable HTTP Scanning box and click on the OK push to update this feature.

This should stop your antivirus from checking the security certificate of every website you lot access.

Bitdefender

  1. Open the dashboard of Bitdefender. If you accept the 2022 version, click on Modules. For an older version you must click on theProtection push.
  2. Click on theWeb Protection button.
  3. Disable the Scan SSL feature.

ESET

For ESET all you take to do is to enable the SSL/TSL protocol filtering feature.

  1. Open ESET antivirus.
  2. Press F5 to open the Advanced setup menu.
  3. Click on Web and electronic mail button > SSL/TSL > Enable SSL/TSL protocol filtering >OK.
  4. Restart the figurer to configure the antivirus filter.

Kaspersky

Kaspersky has a function that can be disabled to cease filtering the websites and it is very easy to exercise this.

  1. Open the dashboard of the antivirus.
  2. Click on the Settings push button from the bottom-left.
  3. Click on the Boosted push > Network.
  4. If you are using the 2022 version, uncheck the Practice not scan encrypted connections box from the Encrypted connections settings department. For an older version just, uncheck the Scan encrypted connections feature.
  5. Reboot your system to configure your antivirus software.

If disabling this feature doesn't solve the trouble, completely disable your antivirus. If the issue nevertheless persists, remove your antivirus and check if that helps.

In case removing the antivirus solves the trouble, this might exist a perfect opportunity to consider switching to a different antivirus solution.

There are many Windows 10 compatible antivirus software that won't interfere with your organization while providing great system protection.

vii. Disable Windows Defender

  1. Open Settings first. You lot can practise that speedily by using Windows Central + I shortcut.
  2. Go to the Update & Security section.
  3. Click Open Windows Security.
  4. Go to the Virus & Threat protection section.
  5. At present click Virus & threat protection settings.
  6. Locate the Real-time protection pick and disable it. You can also disable other options if you desire.

Even if you don't use a tertiary-party antivirus, sometimes Firefox install can go stuck on your PC.

This can be caused past Windows Defender, and in order to fix the problem, you need to disable it as described above.

After disabling this option, endeavour to install Firefox once more. If Firefox installs successfully, be sure to enable Windows Defender again.

8. Download the full installer

In order to distribute Firefox faster, Mozilla offers two types of installers, standard and total. The divergence betwixt the two is their size.

The standard installer is lighter, so it needs to download the setup files in social club to install Firefox. This can sometimes cause the Firefox installation to become stuck.

On the other hand, the full installer won't download whatever additional files, instead, it will install Firefox right abroad.

This is a elementary solution, and many users reported that information technology works, and then be sure to effort it out. You lot can get the full Firefox installer correct away.

Nosotros hope these methods will help you out with any issues yous might have when trying to install the Firefox browser, peculiarly when the installer remains stuck on now installing.

If none of these methods helped yous, we strongly recommend yous to get in touch with the Support section of Mozilla.