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How to Uninstall Mozilla Firefox and Delete Stored Files

Learn how to completely uninstall the Mozilla Firefox browser and delete the stored files and folders. We can do a clean wipeout of Firefox from the system.

Mozilla Firefox is one of the oldest and most private web browsers. However, there are few other better alternatives with the great offerings. If you plan to switch away from the Firefox browser, just uninstalling the app from the system won’t delete all the stored data. We need to manually trash the files and folders that Firefox creates while installing.

Uninstall Firefox browser and Wipe Out Data

Such has been its dominance in recent years that Firefox has become a synonym for privacy-centric browsers.

Be it the efficient handling of cookies, the three layers of Enhanced Tracking Protection, or the ability to block harmful trackers, fingerprints, and scripts, there’s a lot to look forward to in this offering from Mozilla.

However, as with other web browsers, Firefox isn’t free from its fair share of issues. Sometimes, it could quickly rectify the underlying problem by resetting it or deleting the stored cache and cookies.

If the issue is of significant proportions, then you would have to perform a reinstall. But before doing so, the browser must be removed entirely from your PC. We aren’t just talking about the uninstallation of the application; its data, program, and settings files also need to be deleted.

Along the same lines, if you plan to ditch Firefox for any other web browser of your choice, then removing its data files is of paramount importance.

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Note: Follow the steps mentioned are valid for Windows users. Mac users can trash the Firefox App from the Finder’s Applications folder.

So keeping all these points in mind, this guide will show you the steps to uninstall and delete the Mozilla Firefox files completely.

Uninstall Firefox via Settings

We will start the process by uninstalling the browser via the Windows Settings page. The method is similar to removing any other app from your PC. Here are the steps to uninstall Firefox browser:

  1. Open the Windows Settings menu using Win + I shortcut keys.
  2. Switch to the Apps tab, and select the Apps & Features menu.
  3. Scroll down to Mozilla Firefox, and click on the More vertical 3dots icon for options.
  4. Select Uninstall command from the menu.
    Uninstall Mozilla Firefox from Windows Apps and Features
  5. Hit on Uninstall in the confirmation dialog box and wait for the process to complete.
    Confirm Firefox Uninstall from Windows PC

However, if the uninstallation process fails to initiate, there is an alternate way out.

Open the File Explorer via the Taskbar and open the Program Files folder locations for Firefox.

C:\Program Files\Mozilla Firefox\uninstall\
C:\Program Files (x86)\Mozilla Firefox\uninstall\

Firefox Helper.exe software in Uninstall folder

Within the Firefox Uninstall folder, find the helper.exe file. Double-click to run the helper and proceed with the on-screen instructions to complete the uninstallation process.

It will now remove Firefox from your PC. Let’s now proceed ahead and delete its data and program files.

Stop Background Process

Before removing the browser’s data files, you must kill all its processes from functioning in the background. If you don’t do so, the system wouldn’t allow deleting its associated files.

Here are the steps to stop the background running processes:

  1. Launch Windows Task Manager using Ctrl + Shift + Esc shortcut keys.
  2. Switch to the Details tab and select the firefox.exe file.
    End Mozilla Firefox running process from Task Manager Details tab
  3. Hit the End Task button to close that process.
    Make sure to stop all the running tasks.
  4. Next, switch to the Processes tab and expand the Background Process section.
  5. Select Firefox from the list, and hit End Task.
    Kill Firefox Processes from Windows Task ManagerMake sure to end all running Firefox processes.

Once you have stopped all the browser’s background tasks, there should be no issues in carrying out the below steps to delete Firefox’s data and settings files from the computer.

Delete Program Folder

The apps and software installed in Windows PC create a folder directory within the Program Files folder. We no longer need these files and folders once we uninstall the Firefox browser.

Here are the steps to delete program files and the installation directory:

  1. Launch File Explorer using Win + E shortcut key.
  2. Head over to the Program Files folder in either of the two locations.
    C:\Program Files\Mozilla Firefox
    C:\Program Files (x86)\Mozilla Firefox
  3. Select the Mozilla Firefox folder from that directory.
    Firefox Program Files folders in Windows OS
  4. Right-click for the context menu and click on the Delete command.

With this, you have deleted the browser’s Dynamic Link Libraries, Executables, and all its INI configuration files. Let’s now carry out the final task — delete the user-data files.

Delete Firefox User Data

It’s time to remove all the browser data files associated with your account. These include likes of saved passwords, bookmarks, favorites, cookies, and other related data. Here are the steps to delete user browser data from App Data folder:

  1. Launch File Explorer via the Start menu.
  2. Copy-paste the AppData folder location in the address bar and hit Enter.

    Make sure to replace UserName from the above address accordingly.

  3. Delete the Firefox folder present inside the Mozilla folder.
    Firefox Local App Data Storage folder in Windows PC

That’s it. You have successfully removed Mozilla Firefox and all its associated files from your PC.

Bottom Line

So this was all from this guide on how to completely uninstall and delete Firefox files.

If you take the traditional approach of uninstalling the browser via the Settings menu, it might lead to a few issues, especially when you plan to install a new web browser.

Likewise, if you want to give this browser a fresh install, its existing files could conflict with the process. Even if the installation process is complete, Firefox will still use the old configuration and settings files.

As a result, the underlying issue would continue to bug the newly installed Firefox version. All in all, it is paramount to remove all the data and settings files for the browser if you are no longer planning to use it.

On that note, we round off this guide. If you have any queries about wiping out the Firefox browser from the computer, let us know.

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Sadique Hassan

Sadique is a Bachelor of Computer Application in Computer Science and an MBA professional. He became a tech writer by choice and has continued pursuing it for the last 7+ years. He is keenly interested in open-source technology like Android and also loves troubleshooting the tech. Connect with him on LinkedIn.

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