I use vertical tabs with the sidebar collapsed, and the nova design makes them so small that I can barely swap between tabs anymore without accidentally closing them. For now, I'm using Firefox with `browser.nova.enabled` set to false in my `user.js`...
The roundness is borderline unusable. It's akin to Apple's Liquid Glass Idea. Also, the high contrast of the URL bar and the active tab are too much. I do not like this at all.