I couldn't get it to do anything with the mouse. As far as I could tell, it uses key presses outside of text input widgets to do anything useful. My Firefox is

I couldn't get it to do anything with the mouse. As far as I could tell, it uses key presses outside of text input widgets to do anything useful. My Firefox is set up to search as I type, so key presses outside of text input widgets aren't visible to the application. Oh well. Structural editors didn't catch on in the 1980s, I'm not holding my breath for the 2010s. But we'll see; some things do change. Also, it might really be useful for beginners or people who write programs without considering themselves programmers.