Google Chrome users have been warned to keep their eyes peeled for a malicious extension that can make hackers infiltrate their personal accounts and drain money from their bank.
The threat, called Cloud9, allows hackers to steal the information available during the browser session.
Security firm Zimperium says Cloud9 can also install malware on a user's device, so that hackers can then take control of a device remotely and steal someone's passwords as well as credit card data.