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Manifest edge_side_panel browser support

Published Updated

edge_side_panel is a web app manifest member that opts a PWA in to being pinned to the sidebar in Microsoft Edge. Microsoft’s July 2026 documentation update states that the feature “is being deprecated” and “will soon no longer be supported.”

This page has no compatibility table: no cross-browser dataset tracks the member, and Microsoft’s documentation describes only Edge’s behaviour.

  • Scope: the documentation covers Microsoft Edge only and does not document any other browser implementing the member.
  • Prerequisites: the manifest must already contain name, short_name, description, and icons before edge_side_panel is added; the one documented field is preferred_width.
  • Detection: Microsoft recommends User-Agent Client Hints and, where they are unavailable, looking for Edge Side Panel in the User-Agent string.