You should check out Workona's workspaces. We've built some of what you've mentioned as a Chrome extension backed by a web app.
Our workspaces (persistent windows with names) remember your tabs automatically, are multiuser/collaborative, and even have a URL (like any good web object). You can also access your workspaces on multiple computers, so you can start a project at work and finish it at home.
We're officially launching out of beta next month, but you can sign up now if you're interested:
Our workspaces (persistent windows with names) remember your tabs automatically, are multiuser/collaborative, and even have a URL (like any good web object). You can also access your workspaces on multiple computers, so you can start a project at work and finish it at home.
We're officially launching out of beta next month, but you can sign up now if you're interested:
https://workona.com