<p>Use Developer tools (F12) visiting e.g., <a href="https://www.openstreetmap.org/#map=13/24.3577/120.9286" rel="nofollow">https://www.openstreetmap.org/#map=13/24.3577/120.9286</a><br>
The page loads fine, but in the Console I see<br>
In Firefox:</p>
<blockquote>
<p>Content Security Policy: The page’s settings blocked the loading of a resource at inline (“script-src”). <a href="http://www.openstreetmap.org:1:1" rel="nofollow">www.openstreetmap.org:1:1</a></p>
</blockquote>
<p>In chromium:</p>
<blockquote>
<p>Refused to load manifest from '<a href="https://www.openstreetmap.org/assets/manifest-63908e2%E2%80%A6.json" rel="nofollow">https://www.openstreetmap.org/assets/manifest-63908e2….json</a>' because it violates the following Content Security Policy directive: "manifest-src 'none'".</p>
</blockquote>

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