Marble

If you're the kind of person who ends up with 30 tabs open and no idea which is which, Marble was made for you. It's an automatic tab grouping extension that organizes your browser tabs by domain and subdomain — transforming a cluttered, overwhelming browser into a structured, easily navigable workspace.

Marble automatically sorts your tabs into domain-specific clusters in the background, so you can always find what you're looking for without the stress of hunting through a sea of open tabs. It's a small change that makes a surprisingly big difference to how smoothly your day flows.