11. The computer system of claim 10 , wherein the browsing application is configured to present a common graphical element with the visual representation of the particular hotword in the presentation of the electronic document, the common graphical element indicating that voice operations are associated with the visual representation of the particular hotword.
11. The computer system of claim 10 , wherein the browsing application is configured to present a common graphical element with the visual representation of the particular hotword in the presentation of the electronic document, the common graphical element indicating that voice operations are associated with the visual representation of the particular hotword. 12. The computer system of claim 11 , further comprising a conflicts manager, on the one or more computing devices, configured to select, in response to identifying the spoken input that corresponds to the particular hotword during presentation of the electronic document, the particular set of operations assigned to the particular hotword from among multiple sets of operations assigned to the particular hotword, wherein the electronic document specifies multiple instances of the particular hotword, wherein at least two instances of the particular hotword specified in the electronic document are associated with a different set of operations from among the multiple sets of operations assigned to the particular hotword.