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Clear a site's cookies and data

Clearing a site’s cookies and site data signs you out of it.

A site keeps showing you an old version of your account, and signing out doesn’t help.

  1. In the address bar, select the Privacy and Security button.
  2. Select Clear cookies and site data.
  3. Select Clear and reload.

The tab reloads, and you’re signed out of the site.

  1. Open Settings › Sites.
  2. In Your sites, select the site’s row.
  3. Under Cookies and site data, select Clear everywhere.
  4. Select Clear and sign out.
  • The Privacy and Security button clears the site only where the tab keeps it. An isolated Workspace keeps its own cookies, and a private window keeps its own, so clearing in one leaves the others.
  • On the site’s page, Cookies and site data lists each place that holds the site’s data, such as Shared Workspaces or an isolated Workspace, with a Clear button for each.
  • Clearing doesn’t change the site’s protections or other choices. To clear those too, forget the site. See Forget a site.
  • Not cleared. Sval couldn’t write to the disk. Select Try again on that row.

© 2026 Ellm Tree, Inc. Sval is not officially associated with Mozilla or its products. Firefox is a trademark of the Mozilla Foundation in the US and other countries.