Script Summary: Handy on the fly px to em converter.
[Firefox only, so far]
For designers and typographers.
Displays on current page information about clicked HTML element. Shows all values in pixels and ems (relative to parent element).
Also displays hints helpful to designing on the grid.
Some custom options can be set editing the global variables in the source.
See screenshot and more info at http://taat.pl/typografia/em/
