II. Telemetry Revocation Events

Extending the notification telemetry to track when users revoke permissions.

Bug 1998053 | D274203 | Reviewer: timhuang

New Metrics

Building on the initial telemetry work, I added two new events to track permission revocation:

Implementation

Exporting getSiteCategory

The getSiteCategory function needed to be accessible from other modules:

// PermissionUI.sys.mjs
export function getSiteCategory(principal) {
  // ... categorization logic
}

Toolbar Revocation

In browser-sitePermissionPanel.js:

if (idNoSuffix === "desktop-notification") {
  Glean.webNotificationPermission.permissionRevokedToolbar.record({
    site_category: PermissionUI.getSiteCategory(gBrowser.contentPrincipal),
  });
}

Preferences Revocation

In sitePermissions.js:

if (this._type === "desktop-notification") {
  for (let group of this._permissionsToDelete.values()) {
    Glean.webNotificationPermission.permissionRevokedPreferences.record({
      site_category: PermissionUI.getSiteCategory(group.principal),
    });
  }
}

Complete Metrics Summary

With these additions, the full telemetry suite covers 7 events:

1. icon_shown — Permission icon appears
2. icon_clicked — User clicks the icon
3. prompt_shown — Dialog displayed (script vs icon_click trigger)
4. prompt_blocked — Auto-denied (no user gesture)
5. prompt_interaction — User allows/blocks (with persistence tracking)
6. permission_revoked_toolbar — Revoked via toolbar
7. permission_revoked_preferences — Revoked via preferences

This gives Firefox complete visibility into the notification permission lifecycle—from request to revocation.