they just disappeared today. there's no undo or restore all button at the bottom, like what happens when i accidentally hit the x on one of the thumbnails. anyone have any idea what's going on? the homepage is now just the google search bar. it look a lot like google.com but without the "google search" and "i'm feeling lucky" buttons under the bar.
edit: here's a solution i found HUGE thanks to u/Aboss (i hope i got that right)
*#top-chrome-md to 'Normal'
*#ntp-ui-md to 'Disabled'
Now like you said before, disappear bug happens again but you can fix it by:
*#use-google-local-ntp to 'Enabled'
this will get you the old thumbnails back instead of those ugly new ones.
edit edit: how do i unbold that stuff? the bolded lines just have the pound sign (or hashtag sign) in front of it.
edit edit edit: also a huge thanks to everyone in the comments for figuring all of this out and solving this for all of us here!