What would make TypeFlux more useful for your workflow?

TypeFlux currently lets you swap fonts, adjust heading sizes, tune weight, line height, and letter spacing on any live site. You can also click any element to style it individually.

I built it primarily as a design debugging tool, but I'm curious how people would actually use it day to day.

A few things I'm considering for future updates:

- More Google Fonts (currently 30)

- CSS export so you can copy the changes you made

- Firefox support

What would be most useful to you? Or is there a use case I haven't thought of?