I quite like this, but strangely, every so often it seems to jumble the bookmark tile titles with URLs, which is both odd and frustrating.. Also, as someone else noted, you can create sub-folders to group bookmarks, but you can't drag bookmarks to them, or create new bookmarks in them... So.. starting to go off it a bit...

Update: notified these bugs have been addressed, thanks for addressing this. I'll give it a go :o)

Update 2: Well, currently running v1.14.7 on FF v.90, and have just logged in to find half my tiles have the same name... Again. However, "drag shortcuts to folder" seems to work. It's getting there... :o)