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How to Clear Cookies in Firefox

April 10, 2025

What Are Cookies and How Do They Work

Discover how to clear all cookies on Firefox. Cookies are small text files that browsers store on your device when you visit them. These files contain site preferences, login information, and other data that allow websites to remember your preferences for a certain period making your browsing more efficient. Learn how to clear cookies on Firefox browser manually in just a few steps.

Reasons to Clear Cookies in Firefox Web Browser

Clearing cookies on Firefox can be beneficial for several reasons:

  • Privacy - By deleting cookies on Firefox or other browsers, you reduce the personal information websites can collect about you.
  • Security - Deleting cookies can protect you against unauthorized access to your accounts if you use a shared or public computer.
  • Performance - Sometimes, corrupt or outdated cookies can affect website functionality; deleting them can solve these problems.

Learn how to clear cookies on computer Firefox and mobile devices below.



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How to Clear Cookies Firefox on Windows and Mac

Clearing cookies in Firefox is pretty straightforward. Below are methods for deleting cookies in Firefox on Windows and Mac systems.

Method #1 - Delete cookies in Firefox via Settings

  1. On your desktop, click on the menu button (three horizontal lines) in the upper right corner of Firefox and select "Settings".
  2. In the left panel, choose "Privacy and Security."
  3. Scroll to the "Cookies and site data" section & then click "Clear data."
  4. Ensure the "Cookies and site data" option is selected and click "Clear."

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how to clear cookies on firefox

clear cookies in firefox

Method #2 - Clear Cookies for a Specific Website in Firefox

  1. Navigate to the website whose cookies you wish to delete.
  2. Click on the padlock icon to the left of the address bar.
  3. Select "Remove cookies and site data."
  4. Confirm the action by clicking on "Remove."

how to clear cookies firefox

Method #3 - How Do I clear Cookies in Firefox Automatically When Closing the Browser

  1. Click on the menu button and select "Settings."
  2. Select "Privacy & Security" in the left panel.
  3. In the "Cookies and Site Data" section, check the box "Delete cookies and site data when I close Firefox."

how to clear cookies in firefox

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How to Clear Cookies on Firefox for Android and iOS

How to Clear Cookies on Firefox Android:

  1. Open Firefox and tap the menu icon (three vertical dots) in the upper right corner.
  2. Select "Settings."
  3. Scroll down and tap "Delete browsing data."
  4. Select "Cookies" and any other data you wish to delete.
  5. Tap "Delete data."

How to Clear Cookies from Firefox iOS:

  1. Open Firefox and tap the menu icon (three horizontal lines) in the lower right corner.
  2. Select "Settings."
  3. Scroll to the "Privacy" section and tap "Data Management."
  4. Make sure "Cookies" is selected and tap "Delete private data."

How to Clear Firefox Cookies for One Site Only

In addition to the 2nd method above, you can delete cookies on Firefox for a specific site by following these steps:

  1. Click on the menu button and choose "Settings."
  2. Select "Privacy and security."
  3. In the "Cookies and site data" section, click on "Manage data..."
  4. Find the website in the list, select it and click on "Remove selected."
  5. Click on "Save changes."

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How to Clear Cookies in Firefox browser Automatically

Set Firefox to Automatically Clear Cookies on Exit

This process is identical to 3rd method described above.

  1. Click the menu button and select "Settings."
  2. Select "Privacy and Security."
  3. In the "History" section, next to "Firefox will:", select "Use custom settings for history."
  4. Check the box "Clear history when Firefox closes" and click on "Settings..."
  5. Select "Cookies" and any other data you want to be automatically deleted.
  6. Click "OK" to save the changes and refresh.

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If you encounter any issues or need extra support, please visit the Firefox Help website.

How to Protect your Browser Using Stands Free Adblocker

How Stands Free Adblocker Helps Manage Cookies in Firefox

Stands Free AdBlocker is an effective Ad Block for Firefox you can download 100% free. It offers a user-friendly interface, maximum protection, and a browsing experience. Stands removes all ads, and it is also compatible with Chrome, Edge, Opera, and Brave and blocks all Android ads. Also Stands provide a new features: A Cookie Blocker to enhance your browsing even more.

Advantages of Using Stands Free Adblocker for Privacy and Performance

  • 100% Free Ad Blocker: Stands offers good ad-blocking features for free. The adblock extension is easy to install and customize to block ads.
  • Effective ad blocking: Stands Pop Up Blocker allows you to customize which types of ads are blocked per site or in general.
  • A lightweight extension: Stands works with minimal consumption of system resources on your devices.
  • Compatible with Firefox: Stands Ad Blocker integrates easily as an extension and is simple to configure in Firefox.

Keep Firefox Clean and Fast by Managing Cookies

Proper cookie management can improve both the security and performance of your browser. To keep Firefox in top condition:

  • Delete cookies regularly if you visit many websites or share your device.
  • Use extensions like Stands Adblocker to block ads and reduce unnecessary distractions.
  • Enable automatic deletion when closing Firefox, especially if you prioritize privacy.
  • Avoid accumulating unnecessary cookies by limiting the use of untrustworthy sites or configuring Firefox to block third-party cookies.



FAQ

How do I clear all cookies Firefox?

Start by going to Menu, Settings, Privacy and Security, and Cookies and Site Data and Clear Data..., select "Cookies and Site Data" and confirm the deletion.

How do you Clear Cookies on Firefox for one Site?

You can do it from the padlock icon in the site's address bar or Settings → Privacy and Security → Manage Data, where you can search for the domain and delete only its cookies.

How do I clear cookies on Firefox automatically every time I close the browser?

In Settings → Privacy & Security, activate the option "Delete cookies and site data when Firefox closes." You can also customize the deleted data from the "History" section.

Does clearing cookies log me out of websites?

Yes. When you delete cookies, sites forget your active session, so you must log in again to those that require authentication.

5How is clearing cookies different from clearing cache

Cookies store user-specific information such as logins, preferences, and session data. On the other hand, the cache saves static website elements (cached images and files) for faster loading on future visits. Deleting cookies affects your personalized experience on sites. Clearing the cache can improve performance when content is corrupted or outdated.