Yes, they prohibit anything that might be used for this purpose.[0] So the CSS allowed for :visited selectors is limited to a small subset. [0]: https://hacks.

Yes, they prohibit anything that might be used for this purpose.[0] So the CSS allowed for :visited selectors is limited to a small subset. [0]: https://hacks.mozilla.org/2010/03/privacy-related-changes-coming-to-css-vistited/ https://hacks.mozilla.org/2010/03/privacy-related-changes-co...