<p></p>
<p><b>@tomhughes</b> requested changes on this pull request.</p>

<hr>

<p>In <a href="https://github.com/openstreetmap/openstreetmap-website/pull/2714#discussion_r456554623">config/initializers/secure_headers.rb</a>:</p>
<pre style='color:#555'>> @@ -7,7 +7,7 @@
   :form_action => %w['self'],
   :frame_ancestors => %w['self'],
   :frame_src => %w['self'],
-  :img_src => %w['self' data: www.gravatar.com *.wp.com tile.openstreetmap.org *.tile.openstreetmap.org *.tile.thunderforest.com tileserver.memomaps.de *.openstreetmap.fr],
+  :img_src => %w['self' data: www.gravatar.com *.wp.com tile.openstreetmap.org *.tile.openstreetmap.org *.tile.thunderforest.com tileserver.memomaps.de *.openstreetmap.fr *.global.ssl.fastly.net],
</pre>
<p>I'd make this an override in the <code>embed</code> method of the export controller rather than enabling it globally.</p>

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