How to clear cache and cookies in Firefox

Complete guide with multiple methods and troubleshooting

7-10 min read
Expert Verified
Last Updated: August 2025

Quick Answer

Clearing cache and cookies in Firefox is essential for maintaining browser performance and ensuring privacy. This process can be accomplished through various methods, allowing users to choose the one that best fits their needs.

Easy⏱ 7-10 min read

Prerequisites & Requirements

Before clearing cache and cookies in Firefox, ensure the following:
  • •A computer or device with Firefox installed (version 78 or later recommended).
  • •Administrative access to the device if necessary.
  • •Backup important data, such as saved passwords or form data, if needed.

Method 1: Clearing Cache and Cookies via Firefox Settings

This method is the most straightforward way to clear cache and cookies and is recommended for regular maintenance.
  • •Step 1: Open Firefox and click on the menu button (three horizontal lines) in the top right corner.
  • •Step 2: Select 'Settings' from the dropdown menu.
  • •Step 3: In the left sidebar, click on 'Privacy & Security'.
  • •Step 4: Scroll down to the 'Cookies and Site Data' section and click on 'Clear Data...'.
  • •Step 5: In the dialog box, ensure both 'Cookies and Site Data' and 'Cached Web Content' are checked, then click 'Clear'.
  • •Step 6: A confirmation message will appear; click 'OK' to finalize the process.
  • •Step 7: To verify, revisit a previously visited site to ensure it loads fresh content.

For Windows 11

Follow these specific steps for Windows 11 users:
  • •Ensure Firefox is updated to the latest version via Microsoft Store or direct download.
  • •Access the settings as described in Method 1, as the interface is similar to Windows 10.

For Windows 10

Windows 10 users can follow the same steps outlined in Method 1.
  • •Confirm that your Firefox version is up to date by navigating to 'Help' > 'About Firefox'.

Method 2: Using Keyboard Shortcuts

This method is quick and efficient for users familiar with keyboard shortcuts.
  • •Step 1: Open Firefox.
  • •Step 2: Press 'Ctrl + Shift + Delete' (Windows) or 'Command + Shift + Delete' (macOS) to open the 'Clear Recent History' dialog.
  • •Step 3: In the dialog, select 'Everything' from the 'Time range to clear' dropdown.
  • •Step 4: Ensure 'Cookies' and 'Cache' are checked, then click 'Clear Now'.
  • •Step 5: Confirm the action by checking for a message indicating the data has been cleared.

Troubleshooting Common Issues

If you encounter problems while clearing cache and cookies, consider the following solutions:
  • •Error: 'Unable to clear data' - Solution: Ensure Firefox is not running in Safe Mode. Restart Firefox normally.
  • •Issue: 'Cookies not cleared' - Fix: Check if you have any extensions that manage cookies and disable them temporarily.
  • •Problem: 'Cache still present after clearing' - Workaround: Manually delete specific site data by going to 'Settings' > 'Privacy & Security' > 'Manage Data...'.

Advanced Tips & Shortcuts

For power users, here are some additional tips and shortcuts:
  • •Keyboard shortcut: 'Ctrl + Shift + R' (Windows) or 'Command + Shift + R' (macOS) - This performs a hard refresh, bypassing the cache.
  • •Command line: Use Firefox's built-in developer tools (F12) to inspect and clear cache for specific sites.
  • •Hidden feature: Enable 'about:preferences#privacy' in the address bar for quick access to privacy settings.

Common Mistakes to Avoid

Avoid these common pitfalls:

Expert Tips

Regularly clearing cache and cookies can enhance browser performance and security.