If your browser is Firefox and use uBlock Origin, there is an option of Block media elements larger than _ kb.
It is good. Animations or pictures beyond the prescribed size are replaced by a red border. Clicking it will load that image. Or you can temporarily turn it off for the website and reload the tab.
For the websites you visit often and wish to see images in, there is an option to exclude them.
https://github.com/gorhill/uBlock/wiki/Per-site-switches#no-large-media-elements
Saves net and makes browsing faster. Can disable autoplay in some sites too.