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---
title: Security preferences
slug: Midas/Security_preferences
translation_of: Mozilla/Projects/Midas/Security_preferences
---
<h2 id="Changing_the_preferences_in_Firefox">Changing the preferences in Firefox</h2>
<ol>
<li>Quit Firefox. If you have Quick Launch running (on Windows, this is an icon in the toolbar), quit that too.</li>
<li><a class="external" href="http://support.mozilla.com/en-US/kb/Profiles">Find your Firefox profile directory</a>.</li>
<li>Open the <code class="filename">user.js</code> file from that directory in a text editor. If there's no <code>user.js</code> file, create one.</li>
<li>Add these lines to <code class="filename">user.js</code>:
<pre class="code">user_pref("capability.policy.policynames", "allowclipboard");
user_pref("capability.policy.allowclipboard.sites", "https://www.mozilla.org");
user_pref("capability.policy.allowclipboard.Clipboard.cutcopy", "allAccess");
user_pref("capability.policy.allowclipboard.Clipboard.paste", "allAccess");</pre>
</li>
<li>Change the url <span class="external"><code class="url">https://www.mozilla.org</code></span> to the site for which you want to enable this function.</li>
<li>Save the file and restart Firefox. The Clipboard buttons should now function.</li>
</ol>
<div class="note"><strong>Note:</strong> The preference is site as well as protocol specific. For example:
<pre>user_pref("capability.policy.allowclipboard.sites", "http://www.mozilla.org")</pre>
<p>is not the same as:</p>
<pre>user_pref("capability.policy.allowclipboard.sites", "https://www.mozilla.org")</pre>
<p>This is because the first uses <a href="/en-US/docs/HTTP" title="/en-US/docs/HTTP">HTTP</a> while the second uses HTTPS.</p>
</div>
<p>If you want to allow multiple URLs to access the Paste operation, separate the URLs with a space. For <span style="line-height: 1.572;">For more information about security policies, see this article about </span><a href="http://www.mozilla.org/projects/security/components/ConfigPolicy.html" style="line-height: 1.572;" title="http://www.mozilla.org/projects/security/components/ConfigPolicy.html">Configurable Security Policies</a><span style="line-height: 1.572;">.</span><span style="font-family: georgia,times,times new roman,serif; font-size: 1.628em; line-height: 1.572;">See also</span></p>
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