Hi funniestpokemon, could you test whether this takes care of it:

menu button > Settings > Notifications

Turn off "Product and feature tips"

Does that work? I haven't tested it myself.

Hi jscher2000, thank you for your suggestion.

I tried turning off that setting, but it still didn't work.

Actually, I tried playing around with other settings as well, but was not able to find a solution.

Could there be another way of disabling these messages without going to the menu button> Settings?

Thanks again!

Hmm, I can't remember ever seeing the popup/overlay you shared. Snippets at the bottom aren't coming up at the moment, but I generally don't look that far down the "new tab page" anyway.

Could it be an add-on??

Thanks for the suggestion, but these pop-ups appear after installing or resetting Firefox. So actually there are no extensions installed when they occur.

I even get the "Rate us in the app store" pop-up...

Oh, okay, I haven't reinstalled for ages.

Do the messages come back after you click them off or does Firefox then quiet down?

Yes, they disappear after they are clicked off, but every time I reset firefox, they re-appear.