I am so sorry you lost Firby. No, it never gets easier to lose a beloved pet, but they certainly enrich our lives when they are with us. Take your time to grieve for Firby, and then think about whether or not to get another chin. May Firby r.i.p.
I just lost one too. It's hard. Clean the cage, rescue one. That's what I'm trying to do, but easier said than done. I can't even look at the cage. Just think of giving another guy that needs one a great home and remember the great life you gave yours.