Floater
A macOS menu bar app that opens any URL in a chromeless window that can float above other windows.
About
A macOS menu bar app built with MyGo's native UI that opens any URL in a chromeless window, which you can keep floating on top of other windows or run apart from your browser. You add a URL when you launch it, do everything else from the menu bar menu, and move a window with Option+Click. One window takes under 50 MB on macOS 27.