Some web applications include a prediction feature completing search text and address bar URLs based on browsing history and related searches. For example, as the user types in the address bar, the browser might send the current text in the address bar to the search engine before the user submits the request.

Although browser page prediction and prediction services enable faster page loads, they consume additional bandwidth. Also, pre-loaded websites and embedded content can set and read their cookies as if they were visited even if they weren't.