I wonder if “Firefox.next” will be able to print reliably without crashing. Because that’s still a problem in the latest 3.5 builds, along with most of the interface bugs and incorrect OS X behaviors.
But that’s not fun for developers to work on. So they don’t. And the same annoying bugs persist in Firefox for years. Printing hasn’t worked reliably since 3.0. The interface, especially context menus, window placement, and tooltips, has been extremely buggy for Firefox’s entire existence.
They keep making things Awesome™ for the fringe of uber-power-users instead of fixing the common issues that frustrate everyone else and drive average users away from Firefox every day.