Oh, very nice :) Even higher-res than what I found. Thanks! Didn't expect someone at ETH Zurich to host these wallpapers. I like this version without the spaceship a bit more.
In case you don't want to install an extension, search in about:config for "image.webp.enabled" and set it to false. Worth mentioning, there's also a "image.avif.enabled" entry.
That is not the same thing. This addon does not modify "image.webp.enabled" or "image.avif.enabled", it modifies the accept header. If you modify the preferences you mention you will still be served AVIF and WebP, but viewing will break...
Optical image stabilization! I am interested to see that this seems to be the way various predators have solved the problem, I take it that unlike the direction our camera technology is going (which is to throw more software at the problem), it was most economical to use a lot of tiny neck muscle adjustments (no Moore's law for predator brains, to be fair, so it might have tied up a lot of neurons to do the same in software).
EDIT: seems that this extension need to be updated, sorry...
But I don't know, if you allow javascript maybe you will leak your real user agent?
I like to switch between iceweasel and seamonkey, and I'm "proud" of my different and unique user agent :)
Speaking of privacy, actually I'm more concerned about referer, third-party sites, content delivery networks and so on.