1. A method comprising: identifying a context vector representative of a portion of a web page open within a content presentation application executing on a client device, wherein the context vector includes a plurality of terms appearing in the portion of the web page open within the content presentation application executing on the client device; identifying one or more query suggestions based on the identified context vector representative of a portion of a web page open within a content presentation application executing on a client device by: identifying a plurality of prior user queries, and identifying as the one or more query suggestions, from the plurality of prior user queries, one or more most frequent prior user queries that include one or more terms from the identified context vector; responsive to user input in a search interface at the client device, causing display of the one or more query suggestions; receiving a selection of a particular query from the one or more query suggestions; causing display of a search result for the particular query; wherein the method is performed by one or more computing devices.