
"Due to the security fixes, we strongly recommend that all Firefox users upgrade to these latest releases," Mozilla representatives wrote on their development site.
Mozilla worked quickly to fix the flaw discovered by Zalewski, said Mike Schroepfer, vice president of engineering at Mozilla.
"Thanks to the work of our contributors, we have been able to address these issues quickly in order to minimise the security risk to Firefox users," Schroepfer said in a statement.