How to test a VPN after changing browser settings
Check for IPv6 and WebRTC leaks after a browser change, then learn what a changed result means and which settings to check next.
You changed a browser privacy setting, installed an extension, or adjusted a WebRTC control, and now you want to know whether your VPN still protects your connection. A result that changes after a browser update can be confusing, but it does not always mean the VPN stopped working.
Use the VPN Leak Test to check whether your real IP address is exposed through IPv6 or WebRTC while the VPN is on. Then compare the result with what changed in your browser and retest if needed.
Test your VPN after the browser change
- Connect your VPN and wait for it to show that the connection is active. Keep the same VPN location for this check.
- Open the VPN Leak Test in the browser profile where you changed the settings. Let the check finish.
- Read the findings for IPv6 and WebRTC. Note whether the test reports an address associated with your VPN or one that may belong to your regular connection.
- If a finding is unclear, reload the page and test once more with the VPN still connected. Avoid changing several browser or VPN settings between checks.
Use the same network and browser profile when comparing a result before and after a change. A different network, VPN location, or profile can change the result even if the browser setting did not cause it.
What the result means
No leak is reported
The test did not find your real IP leaking through the IPv6 or WebRTC checks it performs in this browser. That is a useful sign, but it is not proof that every app, connection type, or possible leak is protected. This test does not check every kind of exposure, such as DNS behavior.
An address appears to come from your regular connection
Your browser may be exposing an address outside the VPN route through IPv6 or WebRTC. Check that the VPN is connected, then review the VPN app's leak protection and routing settings. A VPN provider may also offer different options for IPv6 or WebRTC handling.
The result changes after a browser setting change
The change may affect what the browser allows a website to see, rather than changing how the VPN routes all traffic. For example, restricting WebRTC can prevent a browser test from checking some WebRTC details. A missing or limited WebRTC result is not automatically proof that the VPN has become safer.
The test shows an address you do not recognize
VPN exit addresses can differ from your home address, and the VPN may use shared addresses for many customers. A private network address, such as one used only inside your home network, is not by itself proof that your public IP has leaked. Focus on whether the result indicates an address from your regular internet connection.
How to fix a possible leak
- Reconnect the VPN. Disconnect and reconnect in the VPN app, then rerun the check. A browser setting change should not normally turn off a device-wide VPN, but the connection may have dropped while you were changing settings.
- Check whether the VPN covers this browser. Some VPNs protect the whole device, while a browser VPN extension may protect only browser traffic. If you use both, check their settings and avoid running conflicting proxy or VPN extensions.
- Review browser extensions and privacy controls. In Chrome, open Settings › Privacy and security. In Edge, open Settings › Privacy, search, and services. Use the browser's settings search for the feature or extension you changed, since available controls and names vary by browser version. Do not disable the VPN extension if it is the VPN you rely on.
- Check the system VPN connection. On Windows 11, open Settings › Network & internet › VPN to review a VPN configured in Windows. On a Mac, open System Settings › VPN if your VPN is configured there. If you use a separate VPN app, check its own connection and leak-protection settings instead.
- Test in a clean browser profile. Temporarily use a profile without extra privacy or proxy extensions, while keeping the VPN connected. If the result differs, re-enable extensions one at a time to identify which one affects the check. Do not use an unprotected profile for sensitive browsing.
- Update the browser and VPN app. Install available updates, restart the browser, reconnect the VPN, and run the test again. If an apparent leak remains, contact the VPN provider with the browser version and the test finding, but do not share sensitive account information.
Why browser profiles can show different results
Profiles can have different extensions, permissions, and privacy settings. A private window may also disable some extensions by default, or allow them only when you choose that option. So a private-window test is not automatically a like-for-like comparison. If you want to compare profiles, keep the VPN location and network the same and note which extensions are active. See how to compare VPN behavior in normal and private tabs for more on that distinction.
The VPN Leak Test checks IPv6 and WebRTC exposure in your browser. It cannot prove that every app on your device uses the VPN, so check the VPN app's device-wide or split-tunneling settings if you need protection beyond browser traffic.
