Join us to show up for other Firefox users 🦊. Earn fun badges and Mozilla swag vouchers! Find out more: https://mzl.la/askafox150

Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Excessive data stored on my device

  • 1 reply
  • 0 have this problem
  • 3 views
  • Last reply by Fylvara
  • Open

Firefox is storing an ever increasing amount of data on my device. It is up to over 600 MB and growing. This is fairly recent How do I access what data is being saved and clean up data that does not need to be using up memory on my device?

Firefox is storing an ever increasing amount of data on my device. It is up to over 600 MB and growing. This is fairly recent How do I access what data is being saved and clean up data that does not need to be using up memory on my device?

All Replies (1)

Hi mthrsdva, you can view information about the stored data by opening Settings, navigating to “Privacy and Security,” and scrolling down to “Cookies and Site Data.”

To get more information about the data a website might store on your computer (cookies, local storage), you can visit the website and open the developer tools. (F12 or right-click -> “Inspect”) Then switch to the “Storage” tab.

For more information, please check out:

Ask a question

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.