Email Security: URL Defense - Supported Browsers

This document outlines the recommended browsers for use with URL Defense.

Recommended Browsers

As of June 2025, URL Defense is fully supported on the following web browsers:

  • Chrome - version 129 or later
  • Firefox - version 131.0.1 or later
  • Microsoft Edge (Windows only) - All versions supported by the Microsoft Edge Lifecycle Policy
  • Safari (macOS only) - version 16.6 or later

Unsupported browsers may work for most links but if you encounter errors we will not be able to open a support case with the vendor to resolve the issue. The recommended workaround is to open the link with one of the supported browsers.

URL redirect failures from unsupported browsers are likely to result in the following landing page:

Proofpoint unsupported browser landing page

More information related to browser troubleshooting can be found in the Email Security: URL Defense FAQ

See Also


Keywords:
microsoft ms office365 o365 m365 email rewrite wrapping proofpoint browser firefox chrome safari edge duckduckgo brave chromium vivaldi opera error link urldefense.com proof point 
Doc ID:
132652
Owned by:
O365 S. in Microsoft 365
Created:
2023-11-08
Updated:
2025-06-24
Sites:
DoIT Help Desk, Microsoft 365