I never write a review for an extension but this one deserves more than this few words.
I've started using this ext since my 2010 notebook started lagging so hard and I've allways been a multi-tab-user, the "share as web page" helps me to change my tabs into devices and to share colleague my current work focus. The right click OneTab in any website is really helpful as well, because you cand send a website into any different tab group and send tabs in any direction to a new group.
These guys/girls did an amazing job with OneTab, it's a simple extension that does a lot of dirty work.
What I would add to OneTab ? Maybe some kind of box to select tabs so you can select some tabs from different groups and you can share them or remove or whatever. And a search box to search from tabs when you have a lot tabs and want to find one quickly.
Excelent job, got my five stars and my first review. Keep on it !