The most impactful change arriving with the Version 109 release cycle concerns legacy operating systems.
The most critical fact about version 109: . Microsoft ended support for those OSes in January 2023. WebView2 109 is the final runtime compatible with them. webview2 runtime version 109
WebView2 109 receives security updates . Since it’s tied to Edge 109, which reached end‑of‑life (EOL) in October 2023 , the runtime itself no longer gets security patches. Running an app on 109 today means accepting unpatched vulnerabilities—a non‑starter for many enterprises. The most impactful change arriving with the Version
If you are still maintaining an app on 109, ask yourself: WebView2 109 is the final runtime compatible with them
Use WebView2 109 only if you absolutely must support Windows 7/8.x. For all other scenarios, move to a newer runtime to get security updates and modern web features.
Microsoft recommends that any app not constrained by legacy OSes (the current stable channel as of 2025). For legacy‑bound apps, the only safe path is to isolate the WebView2 component from sensitive data and network access.