Aprivate tab protect nothing, it only prevents that other with access to your PC see which pages you have visited, the web pages see the same with or without privat tab. It's often misunderstood what private browsing mean. If you want to browse private, there isn't any other as using an Proxy or VPN, using Portmaster, Glasswire or Pi-Hole on desktop, adjust the site permissions in the privacy settings in your browser, than you can browse more or less private, if you also use an search engine which don't log your activity. You can visit Browserleaks, there you can see how private you are.