> Custom views that replace basic functionality The only custom controls I see are the tabs, tab bar, and a few modals (like when opening a new tab), and a han

> Custom views that replace basic functionality The only custom controls I see are the tabs, tab bar, and a few modals (like when opening a new tab), and a handful of buttons and segmented controls in the sidebar. Everything else is native, unmodified Cocoa controls: NSWindow, preference window and its contained controls, the sidebar, etc. I actually am a bit curious about the decision to have those NSButtons with custom backgrounds … they don't really look right both on Catalina or Big Sur. Native-looking NSButtons are used everywhere else, though. > the entire window frame About the only thing that looks unusual here is the custom buttons at the top-left with the diagonal lines. No more custom than Xcode, iTunes. If the problem is that the toolbar seems to be in the titlebar, that's been an accepted, Cocoa-supported window style for a long time — and much more prevalent in Big Sur. It has the correct translucency behaviour in Big Sur. Maybe one day they'll update it to use Big Sur-style full-height sidebars. > It looks, to me, like an Electron or RN "app" Electron and React Native apps wish they could integrate with Cocoa as well as this. Those never look like anything more than a plain NSWindow with a plain, thin titlebar with a web view inside — or worse, not even an NSWindow but one painted with custom controls.