My first thought from the headline was “What’s Windows 1.0?” Then I clicked and realized it’s Arc Browser 1.0 for Windows.
And apparently it's based on Chromium. Porting a brand-new browser engine to long-obsolete Windows is probably plausible. Porting Chromium, a very large beast with a lot of baggage, is much less likely.
that's why arc supports split browser tabs hahaha
It's a desktop environment for DOS that was released in 1985 :)