My website button works in Chrome but not in Firefox

im trying to figure out why the search button (top right) is working for Chrome but not for Firefox. Take a look: https://lectulandia.us

<li class="formWrapper">
<form class="bookSearch" action="/" method="get">
<input type="text" name="s" placeholder="" autocomplete="off" />
</form>
</li>

Thank you!