Does this attack scale linearly with key size?
Using the D-Wave Advantage, we successfully factored a 22-bit RSA integer, demonstrating the potential for quantum machines to tackle cryptographic problems
That attack is a threat only if it scale better than existing attacks.
It would be fair to compare browsers without adding extensions, with default settings.
This would show which browser have the best security and privacy out of the box. Also, the comparison would be practically impossible otherwise.
Most people use defaults, and I suspect a large portion of users install no extension, unless maybe if a tech-savy relative adds an adblocker.