14. A system including a processor that is coupled with a computer-memory device and that executes computer-executable instructions stored on the computer-storage device to perform operations comprising: receiving a search query input into a web-page search field that is displayed by the web browser in a displayed web page, wherein the web-page search field provides a first portal to a first search engine hosted at a first web domain; recognizing, by a toolbar of the web browser, that the displayed web page is associated with a the first search engine by comparing at least a portion of a URL of the displayed web page with a list of text strings of URLs identified as search engines and by correlating the at least a portion of the URL with one or more text strings included in the list of text strings, the toolbar including a toolbar search field that is separate from the web-page search field and that provides a second portal to a second search engine hosted at a second web domain, which is different than the first web domain; identifying, by the toolbar, a first vertical that is selected to be applied to the search query; communicating a request to send a refined search query when the search query is sent to the first search engine, wherein the request specifies the first vertical; receiving the refined search query, which includes a second vertical different from the first vertical and is recommended to be submitted to the second search engine, and search results deemed relevant by the first search engine to the search query; and displaying the search results in a content-viewing portion of the web browser simultaneous with the refined search query, which is displayed in the toolbar search field.
14. A system including a processor that is coupled with a computer-memory device and that executes computer-executable instructions stored on the computer-storage device to perform operations comprising: receiving a search query input into a web-page search field that is displayed by the web browser in a displayed web page, wherein the web-page search field provides a first portal to a first search engine hosted at a first web domain; recognizing, by a toolbar of the web browser, that the displayed web page is associated with a the first search engine by comparing at least a portion of a URL of the displayed web page with a list of text strings of URLs identified as search engines and by correlating the at least a portion of the URL with one or more text strings included in the list of text strings, the toolbar including a toolbar search field that is separate from the web-page search field and that provides a second portal to a second search engine hosted at a second web domain, which is different than the first web domain; identifying, by the toolbar, a first vertical that is selected to be applied to the search query; communicating a request to send a refined search query when the search query is sent to the first search engine, wherein the request specifies the first vertical; receiving the refined search query, which includes a second vertical different from the first vertical and is recommended to be submitted to the second search engine, and search results deemed relevant by the first search engine to the search query; and displaying the search results in a content-viewing portion of the web browser simultaneous with the refined search query, which is displayed in the toolbar search field. 16. The system of claim 14 , wherein the refined search query includes a recommendation to search in the second vertical that is different from the first vertical to which the search query was directed.