Notify the user when enough of the document has loaded in order to begin to browse. 10.4 Notify the user when document loading has stalled. 5.13 Allow the user to turn on and off author-specified page forwards that occur after a time delay and without user intervention. 5.14 Allow the user to turn on and off automatic page refresh. 9.25 Maintain consistent user agent behavior and default configurations between software releases.
Consistency is less important than accessibility and adoption of system conventions.
2.8 Provide a default keyboard configuration for frequently performed operations. 9.15 Identify a link selected by the user. 9.18 Make available whether following a link will involve a fee. 9.12 Make available the number of tables in a document. 9.19 Identify a table selected by the user.