Auto save with "press this"

I used “press this” to create a new post, based on an article I was reading. The post became long, but since I felt the flow, I didn’t clicked on save, and opened the article in the usual wordpress environment.

Unfortunatly my browser crashed, and I lost everything I wrote.

I wonder why “press this” doesn’t have auto-save already?

Thanks for your time,

Martina