We Love Firefox (and IE7)

Google has championed FireFox for quite some time now, and seeing new ads for it on their home page is not a surprise. What is surprising is that there have also been ads promoting IE7 (with Google's toolbar pre-installed, naturally). Is this just seasonal generosity?

My guess: IE7 has functionality that Google will need for a current or future product, and IE6 is not up to the task...