On: I've started using Firefox and can never go back t...

[mixmastamyk]

Option+D would be the analogue on Mac.

This might work: https://addons.mozilla.org/en-US/firefox/addon/shortkeys/

[spurgu → mixmastamyk]

> Option+D would be the analogue on Mac.

For me it's "the key to the left of the spacebar" in terms of muscle memory, so Cmd on Mac.

Tried it, as well as modifying omni.ja... From the add-on page (I tried it):

> shortkeys cannot override Firefox default shortcuts

[mixmastamyk → spurgu]

Look up: https://karabiner-elements.pqrs.org/