No, I really don't need to.

3.6 barely runs on my machine as it is; a number of clients are asking me to downgrade them from 4 to 3.6 because of stupid issues like not saving your tabs by default when you close the browser. I have about thirty tabs open in my browser right now, and the last time I upgraded Firefox, it didn't bother to save any of them the next it launched.

I just can't be arsed to go to that much trouble over one website.

edit: (removed snarky edit.)