Kind of wish Firefox allowed one to modify the common keyboard shortcuts in the browser. But considering the open issue on the matter, I won't keep my hopes up: https://bugzilla.mozilla.org/show_bug.cgi?id=57805

The hacks about seems to be basically steal keyboard shortcuts the same way webpages already do; either through an extension[0] or modifying config-pref.js[1]. Neither of which seems very appealing to me. Though, funnily: I did hit Ctrl-W writing this message to delete a word; thank goodness for cache.

[0] https://addons.mozilla.org/en-US/firefox/addon/shortkeys/

[1] https://old.reddit.com/r/firefox/comments/kilmm2/restore_ctr...