- jumping to a compilation error location;
- live reloading in Espresso live preview window (if you use the SCRIPT tag integration method — see: How do I choose the best integration method?)
- none, should work out of the box.
- Go To Line is implemented by emulating key presses (e.g. Command-L, 4, 2, Enter), which occasionally might go wrong. Sorry, there seems to be no better way.