How to Eliminate Button Padding Discrepancies in Firefox Using CSS?

Eliminating Button Padding Discrepancies in Firefox

In the realm of website development, achieving a consistent user experience across different browsers can be a challenge. One such issue arises with the spacing and padding of buttons in Firefox, which can deviate from the appearance in other browsers.

To address this discrepancy, as illustrated in the code example at http://jsfiddle.net/Z2BMK/, let's delve into a solution that eliminates the extra padding in Firefox without resorting to JavaScript-based hyperlinks.

The Firefox-Specific CSS Extension

The key lies in utilizing a CSS extension tailored to Firefox:

button::-moz-focus-inner {
    padding: 0;
}

By applying this extension, we target a pseudo-element within the button that is only active in Firefox. It allows us to modify the internal spacing without affecting the overall appearance in other browsers.

An Additional Touch for Consistency

To ensure complete visual parity between Firefox and other browsers, we recommend adding an additional rule:

button::-moz-focus-inner {
    padding: 0;
    border: 0;
}

This step removes the dotted outline that appears around active buttons in Firefox by setting the border width to zero. Many developers prefer to remove this outline anyway, often replacing it with a more visually appealing alternative.

With these CSS tweaks in place, buttons will now display identically in both Firefox and other browsers, providing a cohesive user experience regardless of the browser being used.

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