The only yahoo properties that I'm aware of that I use are groups and mail, both of which are a buggy mess. When I started noticing the "Upgrade to firefox" spam I cringed a little bit inside at how far firefox has fallen. I'm using Chrome over here, it's the world's most popular and arguably most powerful browser. I don't need to "Upgrade" away from it, makers of yahoo groups and yahoo mail.

It doesn't come across to me as being good advertising.