Apple on Wednesday added its selective friends-and-family tracking service Find My Friends to its iCloud.com site, letting users sign in on any Internet-connected device to locate friends or loved ones who have the app on their mobile devices and have agreed to have their location revealed to the user. Participants can opt to change status at any time or enable (or disable) the tracking for select periods, such as when a family is visiting a theme park and wants to each go their separate ways.