It's possible to probe the users history even though getComputedStyle doesn't give it away anymore.
See page 6 of this article: http://www.contextis.com/documents/2/Browser_Timing_Attacks....
Obviously turning off Javascript prevents these types of things to some extent, but even then there are ways: https://www.nds.rub.de/media/nds/veroeffentlichungen/2014/07...
The web is just not designed with preventing information leaks in mind.
It's possible to probe the users history even though getComputedStyle doesn't give it away anymore.
See page 6 of this article: http://www.contextis.com/documents/2/Browser_Timing_Attacks....
Obviously turning off Javascript prevents these types of things to some extent, but even then there are ways: https://www.nds.rub.de/media/nds/veroeffentlichungen/2014/07...
The web is just not designed with preventing information leaks in mind.