Check your zoom controls.

<Control> (Mac=<Command>) + (plus) enlarge - (minus) reduce 0 (zero) restore

Did not work :( Trying to make them look like these https://support.mozilla.org/en-US/kb/customize-new-tab-page

Can you attach a screenshot of how it currently shows for you in the current beta?

I'm seeing rather large thumbnails by default (height: 180px) and I can make more tiles appear by zooming out.

• chrome://browser/skin/newtab/newTab.css

Oh, thought I already attached a screenshot :o Here it is..

Did you try to reset the page zoom in case you zoomed out or zoom the page to enlarge the thumbnails?

Yes have tried that :/ But the weird thing now is that it is fixed. I closed Firefox, and when I came back to the PC now it was fixed. Same thing happened earlier today, when I woke up and went to the PC it was fixed from yesterday... Dont know why..

Here is a screenshot of how it is looking now.

It could have been a corrupt file that was overwritten.