I tried to use it but today I decided to remove it.
Win7 64bit, firefox 64bit too
First could not move the tree of folders and bookmarks from the old fast dial for a long time. For some reason, the usual copy/paste did not work, only part of it transferred. Yes, I know that the tree was big, but fast dial was working with him without problem. Finally the tree was moved and it looks like everything worked, but sometimes when I was opening a new tab BSD in no hurry to show me the bookmarks and I was forced to close firefox and start again. But I was almost satisfied and I spent a lot of time updating images for tabs and folders. Today came an update of the firefox and I see only few folders and two links on the main page .... where are all???. my patience was over ((((
Old fast dail, it was perfect and comfortable!!!