Tech help anyone?

I can't access blogger.com from Firefox. Every time I try to access this site I get a page that says "Web Site Blocked By NETGEAR Firewall". That's all fine, but shouldn't my router block access to the site from Opera and IE too? It doesn't.

This problem started yesterday at the same time as another, probably related, issue arose. I'm getting regular updates from my router telling me the following:

TCP Packet - Source:192.168.0.2,2492 Destination:66.102.15.100,80 - [BLOCK]

These messages are coming every 15 minutes or so and the 4 digit number after 192.168.0.2 changes each time. That second IP address - 66.102.100.80 - belongs to blogger, I think.

Does anyone have any ideas?