

That popup you mention sounds like the zen web panel rather than the sidebar. In total that gives 3 concepts: vertical tabs, a floating web panel next to that and the sidebar. I like what they’re trying to do, but it’s not all polished yet with some odd UI glitches or things requiring (re)configuring like the toolbar. That combined with bad font rendering and missing tab groups made me switch back to FF for now…where I now disabled all usage data sharing options.
No, there are ‘workspaces’ -accessed via the buttons on the bottom of the vertical tab bar-with their own tabs, but you can’t group tabs within one workspace (yet). And yes I can open the sidebar -which is not a popup- on the other side. The thing that’s popping up on the left next to the tabs and overlays the site is what Zen calls the web panel.