I can control the number of rows. I can control whether to accept sponsored shortcuts. (I have chosen *not to.) I can control whether I want 1 or more rows to reflect recent activity. (I have chosen *not to.) Yet until I pin my own preference to *every shortcut, it seems I cannot stop FF from putting "suggestions" in the empty slots, based on nothing but a single web visit. This is annoying. Moreover, if I visit several different pages connected to the same site, FF will put them all into shortcuts, with the same icons. This is possibly even more annoying. I am coming from Brave. They don't do things like that, although there is obviously a reason I'm giving FF a look. But I would recommend, heartily, a home page shortcut box in settings that one could click (and actually *mean* something), like: "Don't ever suggest or fill in any shortcuts for any reason. I will handle it, and I don't like correcting your mistaken ideas."