CSS min-height not working on mozilla firefox

Question

I created a div tag with min-height and gave background color 'red'. but on mozilla firefox the height of the div not increasing when the content crosses min-height limit. heres my code:

<style type="text/css"><!--
ul {
    display:block;
    padding:0px;
    width:500px;
}

.b {
    width:250px;
    float:left;
    display:block;
}

div {
    min-height:50px;
    width:500px;
    background-color:red;
}
--></style>

<div>
    <ul>
        <li class="b">asdsad</li>
        <li class="b">asdsad</li>
        <li class="b">asdsad</li>
        <li class="b">asdsad</li>
        <li class="b">asdsad</li>
        <li class="b">asdsad</li>
        <li class="b">asdsad</li>
    </ul>
</div>

its seeming the div height would have to be set to fit contents,but I don't know how else can I do that.if I don't use height then background-color can't be set.please tell me how can I fit the contents to the div as well as the background color would be red.
(Don't know if I explained it clearly.so please ask me if you want to know more about the question.)

-Thanks.

RESOLVED: thank you everybody for your kind answers.

Answer 1

On Firefox, min-height is not interpreted on display: table(-*); properties, juste try to use height: 50px; instead as it is interpreted as minimum height on tables.

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