Apple Safari includes an advertising measurement feature, but fortunately you can turn it off. Update 20 Sep 2024: I now have access to Apple Mac OS and an Apple iPhone and iPad to test on. Will keep these instructions up to date with any changes. These instructions cover Privacy Preserving Ad Measurement along with some other related settings.

On Apple iOS

Open Settings, select Apps, select Safari, then scroll down to Advanced and open the Advanced settings.

Turn off Privacy Preserving Ad Measurement

While you have Settings open, you might as well check two other iOS tracking features.

  • In Settings, go to Privacy & Security, then Tracking, and make sure “Allow Apps to Request to Track” is turned off.

  • Also in Settings under Privacy & Security, find “Apple Advertising” and make sure that “Personalized Ads” is turned off. (You will probably have to scroll down—Apple makes this one a little trickier to find.)

On Mac OS

From the Safari menu, choose Settings, then check the Privacy and Advanced tabs. (On Safari - Version 16.0 (17614.1.25.9.10, 17614) it is under Privacy. On other versions you need to look under Advanced.

On some versions, the setting you need is under Privacy.

Uncheck Allow privacy-preserving measurement of ad effectiveness. (You can also set advanced tracking and fingerprinting protection to in all browsing if it doesn’t break any sites you use. Some corporate web applications are not compatible with Safari privacy features, so if you use Safari for work you might need to leave this alone.)

Update: The Advanced button on the Privacy tab will take you to the Advanced tab.

why turn this off?

The deeper they hide stuff like this, the more it shows they understand that it’s not in your best interest to have it on. (This feature is even turned on by default in Private Browsing!) The Apple billboards are all about protecting you from tracking. I haven’t seen one yet that was more like Connect and share with brands you love! (please me know if you see any Apple billboards like this)

Information has value in a market. When your browser passes information about you—even in a form that is supposed to prevent individual tracking—you’re rewarding risky and problematic advertising practices along with the legit ones. Some advertising has value, but putting legit sites and malvertising on an equal basis for data collection is not helping.

For other browsers

turn off advertising features in Firefox

Google Chrome ad features checklist

(Yes, all the big web browsers have stuff like this that you need to find and turn off now.)