It basically doesn't, I found a few years ago that it also makes your browser more fingerprintable (though in recent time browsers are getting more resistant to this)

https://chaoswebs.net/blog/tracking-ipfs-users-via-cache-pro...

So even if you use a VPN with it, if you are logged into a website that knows you, it could scan what you have saved from ipfs (among known IDs anyways)