4 ms·
Careful about unintended consequences. I saw a project where someone built a version of "Asteroids" where certain fake asteroids would appear or not based on ":
by xamuel 8y ago
Careful about unintended consequences. I saw a project where someone built a version of "Asteroids" where certain fake asteroids would appear or not based on ":visited" css or something. Then by recording where players shot at, the site was able to infer which of various websites you had visited.
- ajb 8y agoYes. If you're trying to build an honest ad network, you're not going to do that; but you still have to worry about leaking information to less honest clients. If the information is in the browser, someone will try to exfiltrate it.
- ubernostrum 8y agoMozilla experimented with the idea you're replying to -- a system that would download a bundle of disparate ads from a central server, and then decide based on information in the browser which ones to show. Take away active content from the ads, or (very distant second best) sandbox them, and you can do targeting without the advertisers or even the distributor being able to figure out why a particular ad was shown.