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Add information about firefox default preferences #2954

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Mar 15, 2021
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Add information about firefox default preferences #2954

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421d906
Add information about firefox default preferences
hamishwillee Mar 8, 2021
a2082d2
Fix up following feedback
hamishwillee Mar 15, 2021
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11 changes: 11 additions & 0 deletions files/en-us/web/http/headers/referrer-policy/index.html
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Expand Up @@ -217,6 +217,17 @@ <h3 id="Specifying_a_fallback_policy">Specifying a fallback policy</h3>

<p class="note">Specifying multiple values is only supported in the <code>Referrer-Policy</code> HTTP header, and not in the <code>referrerpolicy</code> attribute.</p>

<h2 id="Firefox_preferences">Firefox preferences</h2>

Firefox preferences can be used to configure the <em>default</em> referrer policy. The preference names are version specific:
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<ul>
<li>Firefox version 87: <code>network.http.referer.userControlPolicy</code></li>
<li>Firefox versions 59 to 86: <code>network.http.referer.defaultPolicy</code> (and <code>network.http.referer.defaultPolicy.pbmode</code> for private networks)</li>
<li>Firefox versions 53 to 58: <code>network.http.referer.userControlPolicy</code></li>
</ul>
All of these settings take the same set of values: <code>0 = no-referrer</code>, <code>1 = same-origin</code>, <code>2 = strict-origin-when-cross-origin</code>, <code>3 = no-referrer-when-downgrade</code>:
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<h2 id="Specifications">Specifications</h2>

<table class="standard-table">
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