Just a day after its debut, Firefox 16 has been "temporarily removed" from Mozilla's installer page while it addresses what is apparently a serious security flaw in the browser's latest version.

"The vulnerability could allow a malicious site to potentially determine which websites users have visited and have access to the URL or URL parameters," Michael Coates. Mozilla's director of Security Assurance, said on the company's security blog. "At this time we have no indication that this vulnerability is currently being exploited in the wild."

Mozilla is currently working on a fix it expects to ship to users tomorrow, Coates said. But in the meantime, Mozilla is recommending that users downgrade to version 15.0.1, which he said was unaffected by the flaw.

"Alternatively, users can wait until our patches are issued and automatically applied to address the vulnerability," Coates wrote.