I personally use private browsing to look through online stores without leaving analytics on my accounts.
Tracking-services can not only screw with the recommendation but also adjust prices if you've been looking for a particular item for a few days.
This works quite well until I click a link from ebay or amazon for example, since it takes me straight to their respective app and logs the item in the account on said app.
Would it be possible to suppress forwarding links to other apps during private-browsing.
I don't know for certain, but I don't think that I am the only one doing this occasionally.