I've installed Gnome Flashback (Compiz) because I need window control buttons on the right hand side.
Really, the only thing I'm missing is a dash / lens. I'd like to be able to press the "Super" key, type "firef", hit enter, and have Firefox launch.
Is there any plugin I can use?
I read that Unity 2D could do this - but it doesn't seem to be included in 14.04
Unity != GNOME Flashback.
You can try to use Alt+F2 to open run dialog. It will allow you to launch firefox by typing name and hitting enter.