Open private window in firefox with Alfred?

Solution 1:

You could create a workflow that launches the following command suggested by user3439894:

open -a Firefox --args -private-window

Take a look at this Apple SE question:

A less clean way would be to create a separate workflow that launches Firefox, delays for a second, and then executes the private window hotkey (Shift++P (on macOS) or Shift+Ctrl+P (on Windows/Linux)).