The headline is being improperly rendered inside a black box on Firefox

A while back, I inquired about creating a black box with padding around a two-line headline. The solution worked well, except for older versions of Internet Explorer. However, in Firefox, there are occasional issues with the display looking jagged. This occurs every other headline or when scrolling up and down. It's uncertain if this is visible to all Firefox users, so feel free to check it out for yourself:

I attempted to recreate the problem on a fiddle, but since it depends on the surrounding context, replicating the entire blog would be necessary. Below is the CSS code (including some browser-specific hacks due to inconsistent displays):

#page .headline-black {
border:none;
/* 2x "Padding" left */
border-left: 50px solid #000;
}

#page .headline-black h1 {
display: inline;
background-color: #000;
padding: 8px 0 9px 0;
padding: 8px 0 8px 0\9;
font-size: 22px;
line-height:44px;
}

@-moz-document url-prefix() {
#page .headline-black h1 {
    padding: 8px 0 7px 0;
}
}

#page .headline-black h1 .indent { 
position: relative; 
/* "Padding" left */
left: -25px;
}

#page .headline-black h1 .heading,
#page .headline-black h1 .heading a {
color: #fff; 
background: #000;
}

Answer №1

It's strange, but adding a half pixel padding seemed to solve the issue by allowing Firefox to round it as it sees fit.

@-moz-document url-prefix() {
    #page .headline-black h1 {
        padding: 7.5px 0 7.5px 0;
    }
}

This solution feels like a quick fix and not a long-term solution. I'll need to revisit this in the future.

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