How to change default tab navigation shortcuts in Firefox on macOS?

I am trying to remap the default keyboard shortcuts for moving tab positions in Firefox on macOS.

Currently, the default behavior is Ctrl + Shift + Page Up/Down. I find this combination uncomfortable and would like to change it to Shift + Option + Command + [ / ].

I have checked the Firefox settings and about:config, but I couldn’t find a direct way to remap these specific global tab navigation shortcuts.

Is there a way to do this via Firefox settings?

If not, what is the best way to override this at the macOS?

I am running the latest version of Firefox on macOS. Any help would be appreciated!

Browser version: 169
OS Version: 26.4.1