I caught this as well. Fixed it by deselecting "Sponsored Top Sites" option from within Options > Home > Firefox Home Content > Top Sites. Even though I had "T

I caught this as well. Fixed it by deselecting "Sponsored Top Sites" option from within Options > Home > Firefox Home Content > Top Sites. Even though I had "Top Sites" already deselected, I had to temporarily select that options in order to deselect the "Sponsored Top Sites" option.