The design of Google-image search has changed.
Now, when you click on a picture that interests you, Google does not take you to another page, with the display of this picture, but pushes the screen under it with the help of beautiful animation; in the appeared gray space an enlarged copy of the image is shown, some information about it, and two buttons “Visit Page” and “View Original Image”

(click on the image to see how it works live)')
The buttons perform what is written on them: they show the page on which this image is located on the network, and show the full-size image, respectively.
Also, now when you hover on the preview images found by Google, a die appears at the bottom with their extension and the site on which they are located.
For those who like to open many tabs at once with found images (like me): when you click on a smaller version of an image with Ctrl (or middle mouse button), it will still open in a new tab.
If someone has everything that is still displayed as before, then clean the cookies (Tip from
m0nhawk )