Is it possible to swap keyboard shortcuts to use Control instead of Command modifier key on MacOS?
I can assign shortcuts in Keyboard->Shortcuts->App Shortcuts in OS settings, but it doesn't work with FF. Chrome works ok.
Opaite Mbohovái (1)
Firefox has hard-coded keyboard shortcuts, so no, unfortunately, not for any browser function itself, as far as i am aware.
If you want to modify keyboard shortcuts for behavior which takes place on a web page (i.e., inside the content display area), there are some add-ons which might work. https://addons.mozilla.org/firefox/addon/saka-key/
https://support.mozilla.org/kb/keyboard-shortcuts-perform-firefox-tasks-quickly