ProtonVPN's kill switch is leaking your IP address on macOS. Despite Proton's false claim that the regular kill switch protects you when switching servers, it's trivial to see this isn't the case. ...
The bigger issue with VPNs in general is that people assume they are invisible when using one. In reality:
WebRTC leaks can expose your real IP even with a VPN active
DNS leaks mean your ISP can still see which sites you visit
Browser fingerprinting makes you identifiable regardless of IP
A VPN is one layer of privacy, not a complete solution. You also need to worry about your browser configuration, extensions, and fingerprint uniqueness.
If you are curious what your browser is currently leaking, there are tools that will show you exactly what is exposed — canvas fingerprint, WebGL info, fonts, screen resolution, battery level, etc. Pretty eye-opening stuff.
The bigger issue with VPNs in general is that people assume they are invisible when using one. In reality:
A VPN is one layer of privacy, not a complete solution. You also need to worry about your browser configuration, extensions, and fingerprint uniqueness.
If you are curious what your browser is currently leaking, there are tools that will show you exactly what is exposed — canvas fingerprint, WebGL info, fonts, screen resolution, battery level, etc. Pretty eye-opening stuff.