Microsoft Edge Version 109 【2025】

Microsoft Edge Version 109: The Final Frontier for Legacy Windows

Even on supported OSes, users reported a few quirks with Edge 109. microsoft edge version 109

Like all modern versions of Edge, version 109 is built on the Chromium open-source project. Consequently, it incorporated the upstream security fixes and stability improvements found in Chromium version 109. This ensures that the browser remains compatible with the latest web standards and performs efficiently on modern hardware. Microsoft Edge Version 109: The Final Frontier for

Exception for Security

: Despite officially ending support, Microsoft released a critical out-of-band security patch for Edge 109 in September 2023 to address a high-severity "heap buffer overflow" vulnerability (CVE-2023-4863). Key Features and Updates New beforematch event for hidden content (helps search

🌐 Web API & Developer

• New beforematch event for hidden content (helps search find expandable sections)
• CSS overflow: clip – finer control over overflow behavior
• AV1 encoder support on Windows 10/11 (for WebRTC & recording)