DiavoloI have a made a second XPI so you can test Diavolo, the source code editor for Mozilla, if you want. It's available from here, and adds a new menu entry "Diavolo Test" under the Tools menu. The test includes a CSS grammar. The Undo/Redo works much better (ctrl-Z/ctrl-Y) but is not entirely finalized. I also started encapsulating the whole thing into bindings for a <sourceeditor> xul tag but it's not ready yet.