D4VID, not sure that this is possible at the moment. However, the ability to change the built-in shortcut keys is being considered by Mozilla. You can add your voice to those who want this by commenting and / or giving kudos to the relevant posts here: https://connect.mozilla.org/t5/discussions/hotkeys-yes-please/td-p/57804 The second and third posts seem to be especially relevant. Mozilla uses the Connect site to gauge interest in ideas via comments and post karma.