I just downloaded Firefox Quantum on Ubuntu 17.10. I am using i3 as window manager, where I have configured <Alt> as my super key, meaning it is used to switch workspaces, move windows and more. This takes precedence over the <Alt>+1-8 (and <Alt>+9) keybinds in Quantum (and probably other keybinds). Is there a way to change this key bind setting in Firefox, preferably without an extension?