На каких системах он работает?

Windows 10 and 11, 64-bit, is the main platform. Builds for Linux (AppImage, .deb, .rpm and .tar.gz) and macOS (.dmg) come with every release too; today's are marked experimental. From version 0.5.0, Linux isn't experimental any more: it is checked on GNOME, KDE Plasma, Xfce and Cinnamon, in Wayland sessions too, and its packages in clean Ubuntu, Debian and Fedora systems. Still to come there: the Flatpak Firefox isn't checked yet, and screen readers (Orca) don't read GDM's windows yet. macOS stays experimental. See Windows, Mac and Linux and Download.