This add-on enables you to use Ctrl + [0 - 9] short-keys to access dials in GroupSpeedDial add-on: https://addons.mozilla.org/en-US/firefox/addon/groupspeeddial/ Features:

Ctrl + [0 - 9] - opens dials 1 to 10 (use 0 to dial 10)
Multi-digits dialing - can be enabled in main GroupSpeedDial add-on Options page
Ctrl + Shift + [0 - 9] - opens dials in New tab
Alt and CMD keys are also supported!
F4 - opens New tab page
option to disable specific short-keys - Ctrl / Alt / Shift / CMD / F4 / Ctrl + 0

Known Firefox issues:

Not working NumPad numbers (numeric part of your keyboard) - is a Firefox bug
Not working "Ctrl + Shift + 0" is a Firefox bug

Contribution: Please consider supporting my work by becoming my Patron or donation. Thank you :)