I've been trying out Comodo's Icedragon, another FF-based browser. But even after customizing it, I still want to go back to FF. Something about the underlying aesthetic is off (and despite what people say, it's not faster for me). And I refuse to use Chrome as my default.
How are you liking Palemoon?
Pretty well so far. No real problems and everything seems to work exactly like it did for FF. Haven't tried Comodo yet, but I hear good things about Iron, if you like Chrome minus the Gogle spyware.