One thing I immediately missed under OS X Lion was the ability to scroll to the top or bottom of a document with three fingers. Since I browse a lot of long documents, for instance W3C specs, I really needed it back. Open OS X Preferences, show the trackpad panel, switch to the last tab, and select "4 fingers" for the Mission Control and Exposé trackpad shortcuts. Then your usual three-fingers scrolling gestures still work in Firefox.

Far beyond that, I have a question related to the new NSDocument features if you're a mac Mozillian: how could I enable the versioning and autosave features in BlueGriffon?

Note: I tried switching to the new scrolling beheviour of Lion. I really tried. Just could not. I switched back to the Snow Leopard behaviour unchecking the first checkbox in the second tab of the trackpad preferences panel...