Yes it is possible, set up an outbound rule to allow all traffic on port 80 and enable logging.

The router log isn't all that big though so you will also have to enable emailing of the logs to your email account when the log is full.

It's worth bearing in mind this will give you anything from one to several tens of log entries per webpage.

Buy a Draytek 2820, enable port mirroring.
Download Drayteks free Smart Monitor software.
Use really old slow basic PC thats on all the time to install software to.
Job done, monitoring of all web and many other things as well.