Firefox users will be able to address this, other browsers, not so much...

Chuckles ... later int he report:

"This is an exploit, not an 'oopsies,' because it is a hidden and deliberate action to make a third-party cookie appear to be first-party to skirt privacy regulations and consumer choice. This is yet another example of the 'badtech industrial complex' protecting its river of gold."

YMMV ... depending on which side of the divide you reside. :)

Which prompts the reminder to always delete cookies at browser close, and CLOSE the browser often!

As mentioned by Augustine Fou in the Register article this is not a new discovery, I heard it discussed in private chats almost 15 years ago and used it for personalisation ID purposes until totally switched to fingerprinting some years later.

What is new is that, as with many an SEO tactic over the years, it went from limited quiet to 'public' noticed broader usage. Now, it will be interesting to see how long before it slides back into limited use as backlash and defences arise. Just as with discovered and trounced SEO tactics.

For a more detailed explanation, cname cloaking [medium.com], is an easy read.

an exploit, not an 'oopsies'

This decade’s answer to “It’s not a bug, it’s a feature”?

One man's bug is another's feature.

Perspective; or, there are more than 50 shades of grey: even RGB's limited palette gives 256...

Says iamlost, one little light emitting diode (with candle flame flicker failover) adventuring the darknesses between the interwebs.

even RGB's limited palette gives 256...

But only if you count 000 and FFF as shades of grey.

Black and white may each believe they (yes, I frequently indulge in anthropomorphism and personification) are special snowflakes (Narcissist's Delusion) but in reality they are simply the two totalities for a specific constrained electromagnetic spectrum: all or none.

And if it irritates them to be lumped in with all the more muddled greys... :)

If their offspring be grey so be they. :D

HOSTS file? (mvps.org)