Parall
Parall lets you run supported Mac apps as separate instances, each with its own name and Dock icon. Where the target app supports it, instances can also use separate accounts, profiles, and data. Lightweight shortcuts launch the original app without modifying it, including supported sandboxed apps based on Electron, Firefox, Chrome, and Eclipse. You can also configure environment variables, command-line arguments, Dock effects, Info.plist parameter overrides, and an optional menu bar icon, or create Web App, file, folder, and command-line shortcuts.