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Editorial Team
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Asked: 2026-05-25T20:30:08+00:00

Consider the following HTML: <html> <head> <style> TABLE.data TD.priceCell { background-color: #EEE; text-align: center;

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Consider the following HTML:

<html>
<head>
    <style>
        TABLE.data TD.priceCell
        {
            background-color: #EEE;
            text-align: center;
            color: #000;
        }
    
        div.datagrid table
        {
            border-collapse: collapse;
        }
    
        div.datagrid table tbody
        {
            position: relative;
        }
    </style>
</head>
<body>
    <div id="contents" class="datagrid">
        <table class="data" id="tableHeader">
            <thead>
                <tr class="fixed-row">
                    <th>Product</th>
                    <th class="HeaderBlueWeekDay">Price</th>
                    <th class="HeaderBlueWeekDay">Discount</th>
                </tr>
            </thead>
            <tbody>
                <tr style="font-style: italic;">
                    <td>Keyboard</td>
                    <td class="priceCell">20</td>
                    <td style="border-right: #3D84FF 1px solid; border-left: #3D84FF 1px solid;" class="priceCell">2</td>
                </tr>
            </tbody>
        </table>
    </div>
</body>
</html>

Notice that the last cell has a left and a right border in its inline style. You (or at least I) would expect this to be visible. In IE, this is the case. But in Firefox (6), this is not. You can solve this by:

  • Removing position relative on div.datagrid table tbody in the CSS
  • Changing div.datagrid table tbody to div.datagrid table in the CSS
  • Removing the background-color on table.data td.priceCell in the CSS
  • Removing the border-collapse on div.datagrid table in the CSS

This is a simplified version of our code; we also solved it (by choosing option 2). But what I’m wondering about is:

  • Is this a bug in Firefox?
  • Is this a bug in IE?

And especially: what is the reason Firefox wouldn’t show the borders when the CSS is as it is?

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1 Answer

  1. Editorial Team

    This looks like a Firefox bug to me. The backgrounds are painting over the borders; you can see it if you use a translucent background color.

    I filed https://bugzilla.mozilla.org/show_bug.cgi?id=688556

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