15. A non-transitory computer-readable medium having stored thereon instructions, which, when executed by one or more computers, cause the one or more computers to perform operations comprising: identifying, by a browser assistant, a set of one or more context uniform resource identifiers; receiving, by the browser assistant, a set of one or more referenced uniform resource identifiers that are referenced by a search results page provided by a search engine; for each referenced uniform resource identifier, determining, by the browser assistant, a relatedness score based on an extent to which the referenced uniform resource identifier is related to one or more of the context uniform resource identifiers; selecting, by the browser assistant, a subset of the referenced uniform resource identifiers for presentation based on the relatedness scores; and providing, by the browser assistant, the subset of the referenced uniform resource identifiers for presentation as a web page in a browser window.
15. A non-transitory computer-readable medium having stored thereon instructions, which, when executed by one or more computers, cause the one or more computers to perform operations comprising: identifying, by a browser assistant, a set of one or more context uniform resource identifiers; receiving, by the browser assistant, a set of one or more referenced uniform resource identifiers that are referenced by a search results page provided by a search engine; for each referenced uniform resource identifier, determining, by the browser assistant, a relatedness score based on an extent to which the referenced uniform resource identifier is related to one or more of the context uniform resource identifiers; selecting, by the browser assistant, a subset of the referenced uniform resource identifiers for presentation based on the relatedness scores; and providing, by the browser assistant, the subset of the referenced uniform resource identifiers for presentation as a web page in a browser window. 17. The computer-readable medium of claim 15 , wherein the set of one or more context uniform resource identifiers includes uniform resource identifiers associated with one or more of a favorites list, a positive preference list, or a negative preference list.