"Update your browser" is a fake notification designed to trick users into installing malware. The fake notification appears to be from Google however, this is a social engineering trick used to convince users that this fake notification is legit when actually it's not.
Update your browser
This page does not support your version of browser. Please update your software.
If you click the update button it will eventually download and install malware on your computer. It could be anything, spyware, trojans, rootkits or other badware. If you see the fake Update your browser notification as shown in the image below, close the web page and dowload anti-spyware software. We recommend using Spyware Doctor. You should also use TDSSKiller.
Information added: 08/24/11 19:02;
information updated: 08/24/11 19:02