The Epiphany browser now has a spell checker. It can be enabled by clicking on the new drop down menu in the panel, and selecting Preferences>Language. Its inclusion makes Epiphany more usable. It currently has an advantage over other browsers in that it uses GTK3 and doesn't waste space on a title bar- an efficient use of screen space on a laptop (see previous post).
Flash doesn't work with GTK3, so that's a disadvantage.