The latest version of the popular Firefox Internet browser has been pulled amid security concerns, just one day after it was first released.

Firefox version 16 was removed from the Mozilla installer page on Wednesday after a glitch was found that could allow computer hackers to view private search information.

Michael Coates, the director of security assurance, said the company is actively working to fix the security vulnerability.

“The vulnerability could allow a malicious site to potentially determine which websites users have visited and have access to the URL or URL parameters,” Coates wrote in a blog post. “At this time we have no indication that this vulnerability is currently being exploited in the wild.”

Mozilla has temporarily removed Firefox 16 from its website and users who have already downloaded the new web browser will be automatically upgraded to the next release, expected Thursday.

Firefox version 15 is unaffected by the vulnerability.