What private browsing actually does and doesn't protect
Private browsing mode — called Incognito in Chrome, Private in Firefox and Safari, and InPrivate in Edge — stops your browser from storing your search history, cookies, and temporary files on your device. When you close the window, those records disappear. But private mode does not hide your activity from your internet service provider, your employer if you're on their network, or the websites you visit. They still see where you go and what you do there.
Think of it as cleaning your browser's memory, not making yourself invisible online. Your IP address — the number that identifies your device on the internet — remains visible to every site you visit. Websites can still track your behavior, collect data about you, and build a profile of your interests. Private mode just prevents your own device from keeping a record of it.
Private browsing is useful if you share a computer, want to search for something without it appearing in your history, or test how a website looks when you're not logged in. It is not a privacy tool for hiding from websites, networks, or service providers.
Key Takeaways
- Private browsing mode clears your search history and cookies when you close the window, but does not hide your activity from websites or your internet service provider.
- A VPN (virtual private network) encrypts your traffic and hides your IP address from websites, but you must choose a VPN provider you trust because they can see your activity instead.
- DNS over HTTPS prevents your internet service provider from seeing which websites you visit, but does not encrypt the content of what you do on those sites.
- Combining private browsing mode with a VPN and DNS over HTTPS offers stronger privacy than any single tool alone.
- No tool makes you completely anonymous online — websites can still identify you through your behavior, login information, or device fingerprinting.
Using private browsing mode on your device
Every major browser includes private browsing. In Chrome, click the three-dot menu and select "New incognito window," or press Ctrl+Shift+N on Windows or Command+Shift+N on Mac. In Firefox, click the menu and select "New Private Window," or press Ctrl+Shift+P (Windows) or Command+Shift+P (Mac). Safari uses Command+Shift+N on Mac and the menu option "Private Browsing" on iPhone and iPad. In Edge, click the menu and select "New InPrivate window," or press Ctrl+Shift+P.
When you open a private window, your browser will not save cookies, search history, or cached files. Sites you visit will not appear in your history dropdown. Passwords you enter will not be saved. However, files you download will still appear in your Downloads folder — private mode does not delete those. Bookmarks you create will remain in your bookmarks list.
Private mode is most useful for logging into multiple accounts on the same site without logging out of the first one, or for searching without your search history being visible to someone else using the same device. It does not prevent the websites you visit from tracking you or collecting data about your behavior.
How a VPN hides your IP address and encrypts your traffic
A VPN (virtual private network) routes your internet traffic through a server operated by the VPN company, which masks your real IP address and encrypts the data traveling between your device and that server. To websites you visit, it appears you are connecting from the VPN server's location, not your actual location. Your internet service provider sees that you are using a VPN but cannot see which websites you visit or what you do on them.
The trade-off is that you must trust the VPN provider instead. They can see your unencrypted traffic, know which sites you visit, and theoretically could log that information. Some VPN companies keep detailed logs; others claim to keep none. There is no way to verify these claims from outside the company. Free VPNs are particularly risky because they often make money by selling your data to advertisers or other third parties.
To use a VPN, download an app from a VPN provider, create an account, and connect to one of their servers. Most VPNs cost between $3 and $12 per month if you pay annually. Once connected, all your internet traffic is encrypted and routed through the VPN server. Your real IP address is hidden from websites. However, if you log into your email, social media account, or any service that knows who you are, that site can still identify you — the VPN only hides your IP address, not your identity.
DNS over HTTPS prevents your ISP from seeing which sites you visit
DNS (Domain Name System) is the service that translates website names like google.com into the IP addresses computers actually use. Normally, your internet service provider handles DNS requests and can see every website you try to visit, even if you use a VPN. DNS over HTTPS encrypts those requests so your ISP cannot see them.
You can enable DNS over HTTPS in most browsers without installing anything extra. In Chrome, go to Settings, then Privacy and Security, then Security, and turn on "Use secure DNS." In Firefox, go to Settings, then Privacy & Security, scroll to DNS over HTTPS, and select "Max Protection." Safari on Mac goes through System Settings > Network > DNS, though the interface is more limited. Edge has a similar setting under Settings > Privacy, search, and services.
DNS over HTTPS does not encrypt the content of your web traffic or hide your IP address — it only hides which sites you visit from your ISP. Websites still see your real IP address and can still track your behavior. It works best combined with a VPN or as a baseline privacy improvement if you cannot use a VPN.
Combining tools for stronger privacy
No single tool provides complete privacy. Private browsing mode alone leaves you visible to websites and your ISP. A VPN alone hides your IP but requires trusting the VPN company. DNS over HTTPS hides your ISP from seeing your sites but not your IP address. Using all three together creates multiple layers: private mode prevents your device from storing records, DNS over HTTPS hides your site visits from your ISP, and a VPN hides your IP address from websites.
Start with DNS over HTTPS in your browser settings — it requires no extra software or cost and blocks your ISP from seeing your browsing. Add private browsing mode when you want to avoid leaving a record on your device. If you need to hide your IP address from websites or bypass geographic restrictions, add a VPN on top. This combination covers most privacy concerns for everyday browsing.
Even with all three tools, you are not completely anonymous. Websites can identify you through your behavior patterns, the information you enter (like your email address), or device fingerprinting — a technique that identifies your device based on its browser settings, screen resolution, and other characteristics. If you log into any account, that service knows who you are regardless of what privacy tools you use.
What privacy tools cannot do
Private browsing, VPNs, and DNS over HTTPS do not prevent malware, phishing, or other security threats. They do not stop websites from collecting data through forms you fill out or accounts you log into. They do not hide your activity from your employer if you are on their network — employers can monitor traffic at the network level regardless of what privacy tools you use. They do not make you anonymous if you are doing something illegal.
A VPN does not make you safe on public WiFi networks — you still need to avoid entering passwords or sensitive information on unencrypted sites (look for the padlock icon in your address bar). Private browsing does not prevent someone with physical access to your device from seeing what you did — it only hides it from other users of the same device. DNS over HTTPS does not prevent your ISP from knowing you are using a VPN, only which sites you visit through it.
Frequently Asked Questions
Can my employer see what I do in private browsing mode?
If you are on your employer's network, they can see your activity regardless of private mode because they monitor at the network level. Private mode only hides your history from your device itself. If you are on your home network using your own device, private mode prevents your device from storing the record, but your ISP can still see which sites you visit unless you use DNS over HTTPS or a VPN.
Is a free VPN safe to use?
Free VPNs often make money by selling your data to advertisers or other companies, which defeats the purpose of using a VPN for privacy. Some free VPNs have been caught logging user activity or containing malware. If you use a free VPN, assume your data is not private. Paid VPNs are more likely to have incentive to protect your privacy, though you must still trust their claims about logging policies.
Does private browsing hide me from Google or Facebook?
No. If you are logged into your Google or Facebook account, those companies know who you are and can track your activity across the web through their tracking pixels and cookies, even in private mode. Private mode only prevents your browser from storing cookies on your device — it does not prevent websites from setting them or tracking you while you browse.
Will a VPN slow down my internet?
Yes, usually by a small amount. Encrypting and routing your traffic through another server adds latency and uses bandwidth. The slowdown depends on the VPN provider's server quality and how far away the server is from you. Most people notice a 10 to 30 percent speed reduction, though some VPNs are faster than others. Connecting to a server closer to your location typically improves speed.
Can I use private browsing and a VPN at the same time?
Yes, and it is a good combination. Private mode prevents your device from storing records, and the VPN hides your IP address from websites. You can open a private browsing window while connected to a VPN for layered privacy. This does not create any conflicts — they work independently and together provide stronger protection than either alone.