There are two options that seem to work the most consistently...

Firefox

Posted by loves2cook4six on Tue, Mar 2, 10 at 22:09...

I posted this over in the discussions area on the Cooking forum but thought I'd add it here for reference:

I use Firefox and Adblock and have never seen an ad, popup or intellitext on GW. I use Firefox on both my Windows and Mac computers and it's true for both of them.

1. Open Firefox browser

Cut and Paste this link into your browser:

https://addons.mozilla.org/en-US/firefox/addon/1865
Click add to Firefox button
A window will pop. Click install now button
Restart Firefox for the add on to take effect
Then go to tools>Adblock Plus Preferences and add the following filters:

******/adbanner/*

******/advertisements/*

*****http://*/adserver.example.com/*
Click OK

That, together with the filters installed with the program, should get rid of just about everything.

Anything else that shows up, just right click on the ad and click BLOCK.

HTH