EDITED REVIEW: Breaks Multi-Account Containers (github issue 990), potentially massive security issue, especialliy since broken tabs report insecure connectivity to source. PREVIOUS REVIEW: I think it is great, and it is so nice to have my tab groups back. I would like a couple of options regarding UX but I can raise those separately in the github, I am sure, but the main one of those is an option that when you tap a group it opens in a new Window. Otherwise, once you have it setup to work how you like (I advise no 'auto' creation) it is a silent system winner, and great for productivity as you can silence different workflows and come back to them as if you never left. Unlike chromium tab groups which are always there, staring at you ;-).