One click to install and you're good to go. No registration, no fuss. Ferret quietly takes its place among your Chrome extensions while you work.
Ferret's shield starts glowing to offer help as soon as you open a relevant article. Or you can summon Ferret yourself by clicking the Ferret extension button.
After Ferret works his magic, one glance shows you what the article's about, who wrote it and what others are saying about it.
Once you've visited multiple pages, you can use the time machine to outline your reading history and contextualize your research.