[IceyEC]

It doesn't have autocomplete... I bet your browser autocompleted on the field named q

[hnha]

nice potential information leak, is such autofilled text available to the website via javascript?

[IceyEC]

I haven't looked into it but I don't think so. Additionally, you should be accessing it via Tor which wipes its memory of what you type in any fields anyway so no autocomplete! You weren't searching for things you shouldn't be, were you? ;-)