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<h1 id="heading">Set up costmiku ffsync on Firefox</h1><div class="article-details"><div class="item">
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<time datetime="2025-03-01T00:00:00+00:00" pubdate>March 01, 2025</time>
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<p>This has not been written by the RootsourceCC team, but still describes it accurately.</p>
<p>Create a Mozilla account</p>
<p>Go to <a href="https://accounts.firefox.com">https://accounts.firefox.com</a> and follow the "Sign up" steps to create an account.</p>
<p><strong>Configure Firefox Desktop</strong></p>
<p>Please open <code>about:config</code> in your Firefox and point <code>identity.sync.tokenserver.uri</code> to <code>https://ffsync.costmiku.space/1.0/sync/1.5</code>.</p>
<p><strong>Configure Firefox based browsers on Android</strong></p>
<p>These steps have to be followed in a strict order. Failing to do it would probably lead to issues. This should also work in Firefox based browsers like Mull (tested) and others.</p>
<ul>
<li>Open Firefox Browser -> Settings -> About Firefox -> tap 5 times in Firefox logo.</li>
<li>Go back to Settings -> Account -> you should see a new option <code>Sync Debug</code>, tap on it.</li>
<li>Select <code>Custom Sync server</code> and write there your endpoint. It should be https://ffsync.costmiku.space/1.0/sync/1.5.</li>
<li>Exit Firefox completely, reopen and then follow the steps of "Connect a device" to your Firefox account.</li>
<li>After a successful auth process the sync should start working.</li>
</ul>
<p>Configure Firefox on iOS</p>
<p>Not tested.</p>
<ul>
<li>Open Firefox Browser -> Settings -> About Firefox -> tap on the field with Firefox and version number.</li>
<li>Go back to Settings -> Account -> you should see a new option <code>Advanced Sync Settings</code>, tap on it.</li>
<li>Toggle Use Custom Sync Token Server and write there your endpoint. It should be <code>https://ffsync.costmiku.space/</code>.</li>
<li>You might also need to toggle the switch for custom FxA login server and set it to <code>https://accounts.firefox.com</code></li>
<li>Exit Firefox completely, reopen and then follow the steps of "Connect a device" to your Firefox account.</li>
<li>After a successful auth process the sync should start working.</li>
</ul>
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