How do web browsers remember which links have been clicked (and thus, color them purple/differently)?
As of this week, all links in my Google searches have suddenly turned purple, as if they've all been clicked before (even ones I've never clicked). Clicking them doesn't change the color.
My musings --
Is it merely a direct comparison of displayed links to the user's browsing history (handled by the browser)? Is there some sort of clicked-link cache? Is the information local, or is there server involvement (like with headers/cookies)?
I'd prefer to keep my browsing history and not have to wipe/clear it in the hope that it'll somehow fix the issue. Hence why I'm trying to get at the heart of the issue by backtracking how the links are colored purple/blue in the first place.
In a couple of cursory Google searches, it appears that others are having this problem, and even as of 2013-07-05.