Why has my yahoo homepage changed?

Up until the past few days, this has been the page that appears when I visit yahoo.com (which is my homepage):

http://mosquito.the.tool.googlepages.com/yahoo.png

Now, I'm getting this page when i visit yahoo.com:

http://images.ientrymail.com/webpronews/article_pi...

(It's actually a bit different than this; but this was the closest image I could find.)

Frankly, I don't like this new format. With the old format, I could easily see, at the top right corner, if I had new mail. The news tab, in the center, was quick and efficient. And the links bar at the left side had all of yahoo's sites just a click away.

Now, with the new format, it's hard to immediately tell whether I have new mail. The mail tab at the top right corner has been removed. As well, the news tab in the center seems far less efficient. And, the links bar at the left side has left out many important links, such as yahoo answers.

Is there any way to get back the original yahoo format? For some reason, this is only affecting the firefox browser (which is the browser I use). The IE browser is still in the format I like.