You guys absolutely have to have containers as Firefox does. For me, it seems you're faster and less glitchy and, that's why I'm still using Opera. And, the visual quality is just cleaner with the text and everything displayed being crisp and seeming high-resolution. I love that. However, there are serious limitations with extensions or, add-ons as they're called in Firefox. Right now, it's the workspace feature, the clean and tight look of the assets displayed that are keeping me using it. Firefox is kind of evidently slow. However, the range of add-ons and now, the container feature has had me downloading it. I'm really considering switching to it. I would have no choice because those features just align with my workflow. And, your bookmark feature is too much headache. Too, too much headache with that "Passphrase" thing.
Your scaling is the incredible. However, scaling isn't everything.