Complete guide to removing add-ons and extensions in Firefox

Last update: 26/05/2025
Author Isaac
  • Managing Firefox add-ons improves security and performance.
  • There are basic and advanced methods to remove problematic extensions.
  • Reviewing the permissions and origin of each extension is key to protecting your data.

firefox addons

Have you ever encountered Firefox extensions or add-ons that you no longer use or that are causing problems? Surely yes, because over time it's common to install various extensions that promise to improve your experience, but in the end they can slow down the browser, cause errors, or even put your privacy at risk. Managing and removing these add-ons is essential. to keep your browser fast and your information secure.

In this article you will discover All methods to remove add-ons, extensions and plugins in Firefox, both on computers and mobile devices. mobile devices, and you'll also learn what to do if any of these prove particularly difficult to uninstall. In addition, we will explain why it is necessary to keep your extensions under control. And what the risks are of leaving those you no longer need installed. If you've ever been frustrated by slow Firefox or the inability to remove an annoying add-on, here's everything you need to know, explained step by step and with extra tips for browsing with complete confidence.

What are add-ons, extensions, and plugins in Firefox?

Before we dive into how to remove them, it is helpful Know exactly what add-ons, extensions, and plugins are in FirefoxBasically, these tools are small programs that are added to your browser to provide additional functionality. For example, you might have an add-on that blocks ads, another that manages your passwords, or even one that automatically translates web pages.

Extensions and plugins can greatly improve your browsing experience., but it's not all advantages: if you install it too much, it can make Firefox run slower or even compromise the security of your personal data.

Reasons to manage and remove Firefox add-ons

Why should you care about installed plugins? Although some provide advantages, many of them may be out of date, cause errors or be insecureIt's easy to forget about an extension that was installed months ago and that you no longer use, but it's still active, consuming resources and, in the worst case, putting your privacy or data at riskHere are some key reasons why it's important to periodically review and clean your Firefox add-ons:

  • Browser performance: Extensions and plugins can slow down Firefox and increase system memory usage. Getting rid of unused ones helps the browser run more smoothly.
  • Safety: Some plugins are developed by third parties without security guarantees and may introduce malware or spyware. The fewer add-ons you have, the lower your risk of being attacked.
  • Privacy: Many extensions require access to your browsing history, passwords, and other sensitive data. Keeping only the necessary information reduces the likelihood of your personal information ending up in the wrong hands.
  • Avoid mistakes and conflicts: Old or incompatible add-ons can cause Firefox to crash or not work as you expect, especially after a browser update.
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Steps to remove add-ons, extensions, and plugins in Firefox (PC and Mac)

Removing an extension in Firefox is very simple if you follow a few basic steps.Here's the procedure you can follow on any desktop operating system:

  1. Open Mozilla Firefox and access the menu. Click the three horizontal lines icon (known as the 'hamburger menu') in the top right corner of the window.
  2. Select “Add-ons and Themes.” This option will take you directly to the Add-ons Manager, where you can see all your installed extensions.
  3. Enter the “Extensions” panel. Once inside, you'll see a list of all the extensions active or installed in your browser.
  4. Find the extension you want to remove and click on the three dots icon (It used to be a vertical menu, but it may vary depending on the version of Firefox.) From there, select the "Delete" option.
  5. Confirm that you want to remove the extension. Firefox will proceed to uninstall it and delete all associated data.

Additional tip: You can also quickly access the Add-ons Manager using the keyboard shortcut Ctrl + Shift + A (At Windows) or Cmd + Shift + A (At Mac).

How to temporarily disable an extension or add-on

If you don't want to completely remove an extension, but suspect it's causing problems, you have the option to temporarily disable itThis way, you can reactivate it whenever you need without losing your settings.

  1. Open the Firefox menu and go to “Add-ons and Themes.”
  2. Go to the “Extensions” section.
  3. Find the extension in the list and press the blue switch to disable it (it will turn gray). This will disable the extension without removing it.

Remember Disabled extensions still take up spaceIf you know you're not going to use them anymore, it's best to opt for eliminating them altogether.

Removing Add-ons and Extensions in Safe Mode (Troubleshooting Mode)

There are times when a problematic extension prevents normal access to the Add-ons Manager or causes Firefox to crash upon opening. For these cases, Firefox includes "Safe Mode" or "Troubleshooting Mode", in which all extensions and plugins are temporarily disabled, allowing changes to be made more easily.

  • Open Firefox, click on the menu and select Help. There you will find the option «Troubleshooting Mode»You can also search for "Restart with add-ons disabled" depending on the version.
  • Confirm that you want to restart Firefox in this mode. A message will appear informing you that all extensions will be temporarily disabled.
  • Once Firefox is opened in this special mode, Go to the Add-ons Manager and remove (not just disable) the extensions and plugins you want.This way, you'll avoid problems caused by unruly extensions or those that keep giving errors.

How to remove plugins that are difficult to uninstall or that do not allow uninstallation

Regrettably, Some extensions or plugins may resist removal The conventional way. This usually happens with poorly developed, outdated, or even maliciously installed add-ons. If the "Remove" button appears dimmed or disabled, try one of these more advanced methods:

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1. Remove the add-on from the Control Panel in Windows

Some add-ons are installed as standalone programs and appear in the list of installed applications in Windows. Do the following:

  • Accesses Control panel and enters "Add or Remove Programs". Here's a guide to deleting impossible files or folders in Windows..
  • Look for the plugin name in the list. If it appears, close Firefox completely before proceeding.
  • Select the add-on and press uninstallOnce complete, you can open Firefox to verify that it has been successfully removed.

2. Use Firefox Safe Mode

Sometimes, as we've already mentioned, the uninstall buttons become blocked if there are conflicts or errors. Start Firefox in Safe Mode usually unlocks these buttons, allowing you to remove the stubborn extension. Do it following the steps indicated above.

On Mac, you can start Firefox in Safe Mode by holding the key Option pressed when opening the browser, or by executing the corresponding command in the Bus Terminal.

3. Manual deletion from the profile folder

If all of the above fails, you can always opt for Manually delete the add-on folder from the Firefox user profileIt takes a little more work, but it's foolproof. Follow these steps:

  1. Open the Firefox profiles folder. It is usually located in the path %AppData%\Mozilla\Firefox\Profiles\xxxxxxxx.default\ (where xxxxxxxx is a combination of letters and numbers that is different for each installation).
  2. Enter the folder extensions. Each subfolder represents an installed plugin.
  3. If you don't recognize which folder corresponds to the problematic extension, open the file install.rdf with Notepad or any text editor. Search for the text em:name to identify the exact complement.
  4. Once located, close Firefox and delete the add-on folder. When you restart your browser, the extension will be gone.

This method is especially useful for removing malicious add-ons or those that do not appear in the standard Manager.

4. Remove maliciously installed add-ons from the Firefox installation folder

If they don't even appear in the profile, the add-on may be in the Firefox installation folder itself. To remove it:

  • Open the installation path, for example: C:\Program Files\Mozilla Firefox\extensions
  • Go into each subfolder and check the file install.rdf looking for em:name until the plugin to be removed is identified.
  • Delete the problematic folder and restart Firefox.

How to remove add-ons in Firefox for Android

On mobile devices the process is simpler but also necessary. The extensions or add-ons installed in Firefox for Android can be quickly removed following these instructions:

  • Open Firefox on your Android phone or tablet.
  • Access the menu (three dots icon) and enter Accessories.
  • Locate the extension you want to remove, tap on it and press the option Delete.

It's that easy to keep your mobile browser clean and running optimally.

Tips to take before installing new extensions

Prevention is always the best remedy. Before installing any add-on or extension in Firefox, keep these tips in mind:

  • Check out other users' ratings and reviews. So you can get an idea about its reliability and real utility.
  • Check the permissions it requestsIf you're requesting access to information that doesn't seem necessary for your operation, you'd better find an alternative.
  • Visit the developer's official website (if it exists) to verify that it is trustworthy.
  • Always install from the official Mozilla add-ons storeavoiding downloads suspicious externals.
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Is removing plugins enough to improve security and performance?

Controlling and removing extensions is only part of the equation to keep your browser safe and fast.In addition to manual management, you can strengthen your defenses by using additional security tools, such as antivirus software that detects malicious add-ons or browsers with additional protection features.

Solutions like AVG SecureBrowser o Avast Secure Browser They include systems that block dangerous extensions, intelligent scanning, and protection against malware, phishing, and tracking. Changing your browser isn't mandatory, but it's interesting to know that there are other security-focused alternatives.

Of course, you can also periodically clear your data, history, and cookies, which is recommended for any browser and situation to maintain privacy and performance.

Common mistakes when removing extensions and how to fix them

During the removal process, setbacks may arise.Some of the most common situations include:

  • The extension does not appear in the Add-ons Manager: It may be installed outside of the user profile. Try the advanced steps mentioned above.
  • The delete button is disabled: Use safe mode or remove the add-on from the file system.
  • The browser continues to run slowly after removing extensions.: Consider deleting accumulated data, history, or reviewing other applications that may be interfering.

If, despite everything, you continue to encounter serious problems, don't hesitate to restore Firefox to its original state using the "Reset Firefox" feature. This will remove all add-ons and restore your settings, but will retain your personal data and bookmarks.

Improve your experience by managing add-ons correctly

Mastering extension and add-on management in Firefox It allows you to improve browser performance and the security of your data, as well as facilitate your daily user experience.. Periodically reviewing which tools you have installed and removing the ones you don't use is a simple practice with great benefits.

Don't forget to proceed with caution when installing new extensions, always checking permissions and reviews. Keeping Firefox updated ensures you can take advantage of all its features without compromising your privacy or speed.

Related article:
What can you do to remove unwanted Google extensions?

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