Align caret with dotted bottom border in Bootstrap - html

Question

I'd like to align a caret with a dotted bottom border.
I managed to achieve it using this code but it works only in Chromium.
HTML:
<h2 id="a11y-291">
More <div class="btn-group">
<button type="button" class="btn btn-default dropdown-toggle h2Title" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
<span class="dashedUnderline">albums</span>
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li>
artists
</li>
<li class="active">
albums
</li>
</ul>
</div>
</h2>
and css:
.noMarginTop {
margin-top: 0;
}
.h2Title {
border: none;
font-size: 30px;
padding: 0;
line-height: 1em;
}
.h2Title:active,
.h2Title:hover,
.h2Title:focus {
background-color: transparent;
}
.caret {
display: inline-block;
margin-top: 1em; // Not aligned in FF
}
.h2Title .caret {
margin-left: 3px;
}
.dashedUnderline {
border-bottom: 1px dotted black;
}
.dropdown-menu {
left: 0;
right: 0;
min-width: 0;
}
It works as expected in Chromium:
But there is a slight offset in Firefox:
Has anyone a more reliable way to achieve this? I cannot figure out what differs between Firefox and Chromium resulting in an offset.
Thanks

Answer 1

.noMarginTop {
margin-top: 0;
}
.h2Title {
border: none;
font-size: 30px;
padding: 0;
line-height: 1em;
}
.h2Title:active,
.h2Title:hover,
.h2Title:focus {
background-color: transparent;
}
.h2Title .caret {
margin-left: 3px;
}
/* you must add display:inline-block to.dashedUnderline and .caret */
.dashedUnderline, .caret {
display:inline-block;
float:left;
}
.caret {
margin-top: 29px;
}
.dashedUnderline {
border-bottom: 1px dotted black;
}
.dropdown-menu {
left: 0;
right: 0;
min-width: 0;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://code.jquery.com/jquery-3.0.0.min.js" integrity="sha256-JmvOoLtYsmqlsWxa7mDSLMwa6dZ9rrIdtrrVYRnDRH0="
crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="btn-group">
<h2 id="a11y-291">
More
<button type="button" class="btn btn-default dropdown-toggle h2Title" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
<span class="dashedUnderline">albums</span>
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li>
artists
</li>
<li class="active">
albums
</li>
</ul>
</h2>
</div>