Nice, this has potential. Initially ruined by not duplicating Opera’s option to not have the redundant search box removed. No way to import the current speed dial from the old browser. But you are on the right track.

Please carry on! I have grown entirely dependent upon the Opera speed-dial, but I'm not enjoying how Opera's been developing. This is the one big lacunae of Firefox

Please carry on. I always love Opera-like Speed Dial but there hasn't been any really good one for Firefox.