Allow custom shortcuts via System Preferences (e.g. "New Private Window" should be ⇧⌘N)
For those who are annoyed at Firefox on macOS using ⇧⌘P for New Private Window instead of ⇧⌘N, I too, have this issue.
Unfortunately after much trawling around on the interwebs it has led me nowhere except for this sad bug report on Bugzilla.
Does anyone know how else I can use ⇧⌘N for New Private Window?