Apple is the latest in a series of Web browser makers to add a new privacy feature that keeps online advertising networks and other tracking tools from monitoring user activity.
Do-not-track is technology that allows users to opt out of being tracked by third parties in a similar fashion to the do-not-call lists for telephones. The movement accelerated following
Meanwhile, Google, which makes the Chrome browser,in January that users are required to download and install as an add-on.
Lion is currently on its second developer preview and requires that developers and users who are testing the software stay tight-lipped under a non-disclosure agreement. Apple is expected to unveil a price, release date, and more details about the software at its Worldwide Developers Conference.
Apple did not immediately respond to a request for comment on whether the do-not-track feature would make it to the current Mac OS X, or if it would be available to Safari users on Microsoft's Windows platform.