The line height appears slightly smaller in Firefox compared to Webkit

Here is the CSS code I am using:

.btn_container {
cursor: pointer;
font-family: Tahoma,Verdana,Arial;
font-size: 11px;
padding: 0;
width: auto;
}

.btn_center {
background: blue;
color: #FFFFFF !important;
display: block;
float: left;
font-weight: bold;
height: 32px;
line-height: 32px;
padding: 0 10px;
}

The line-height appears as 30 in the center of Firefox, but 32 in WebKit.

While I understand that different browsers may render things differently, I have always been able to center text properly.

In the example below, you can observe that the text drops slightly lower in Firefox: http://jsfiddle.net/mstefanko/EGzEB/5/

Answer №1

In my extensive testing in the past, I have dubbed this phenomenon as "text jiggle". Unfortunately, it is not something that can be easily controlled. One way to minimize it is by assigning an explicit line-height, particularly in pixels, to each text element.

The default line-height can vary significantly across different browsers and for different font families and sizes. By setting a specific line-height, you can address this issue.

However, even with a defined line-height, the exact positioning of the text within the line-height space may still vary slightly from browser to browser. While some font-size and line-height combinations may display consistently across all browsers, others may differ by a few pixels. For example, Arial at font-size:11px and line-height:14px may look the same in Firefox, Webkit, and IE, but changing the line-height to 13px or 15px could result in a 1px difference.

There is no standard behavior for this inconsistency. It ultimately depends on how the specific font-family, font-size, and line-height are rendered by the browser on a particular operating system. For instance, Arial tends to be relatively consistent with minimal variation as long as an explicit line-height is specified, whereas Helvetica can vary by as much as 4 to 6 pixels.

Answer №2

My experience was quite different. While using IE7/compatibility mode and Chrome/Safari, I noticed that some header elements were positioned higher than expected. After some investigation, I discovered that -webkit-margin-before: 1.6em was being added to the headers. Despite trying to adjust this value, it ended up affecting the height of the header and pushing other elements down. However, using the padding option instead worked perfectly for me...

This solution was effective for me:

H1, H2, H3, H4, H5, a.mainTab div {
  -webkit-padding-before: 1px;
}

For elements within a.mainTab div that did not respond to padding/margin adjustments, I wrapped them in a separate div. This approach may also be applicable to headers within li span span elements.

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