User blog comment:Dopp/Technical Update: May 15, 2012/@comment-1474707-20120517130045/@comment-5473581-20120519033455

"Oh god and it seems to have some sort of personalised memory where it shows top results of things you've clicked on in the past."

That's called "form history" or "saved form data" and has been a standard browser feature for the last 15 years.

I know it's browser level form history and not some fancy wikia-only history because it's displaying what I've typed into search boxes on other sites.

(On releated note, I'm still waiting for Wikia to re-enable form history for the edit summary field)