Edit: few years late but just noting here that he added an extension to do ctrl + number shortcuts to open dials in new tabs and current tabs etc. so this is now a perfect addon. 5 stars no requests no complaints just does it all. there is a bug at the moment which is why I'm here again but on his github he has noted that he's fixed it already and is just waiting for firefox to push the update.

original review below:
Looks great, but just missing one thing that I desperately need, keyboard shortcuts! If I press Ctrl + 1 I want to go to my first tab in the speed dial. As if I'd want to keep that default "go to first tab" behaviour.. like what do they expect me to count all my tabs, then type Ctrl + 23 to go to tab #23? who thought of that feature? Let me replace it with shortcuts for your speed dial!

You have my support mate, keep it up! (REALLY appreciate that this supports multi process)