Those Tiles has been these for at least the last couple of releases, if you don't want any, just hover over the right area of each and there's an "X" in the corner to delete. You're right, I don't want these, at least in this manner, see more below.
These are really browsing history on my computer, only one of those sites I have bookmarked.
Though I'd welcome a "Speed Dial" type of bookmarks to my favorite sites, that's not quite what these are. Just if you want to go back & revisit pages.
Here is an article of interest that may be of assistance.
Hope this helps and am going to try it on my Google Chrome.
EDIT: I could tell no difference.
Edited by cat1092, 25 January 2015 - 12:12 AM.