Review for Closy by nascent
Rated 5 out of 5 stars
When you deal with hundreds of tabs at a time mixed with saving sessions and loading them, you are bound to get blanks and duplicate tabs.
Also when you search a website and no longer need to look at its tabs, you can close all tabs from that source without closing the other open tabs. Brilliant.
To create your own collections, you must have a Mozilla Add-ons account.