Why Doesn't CSS `border` Work on Checkboxes in Older Firefox Versions, and How Can I Fix It?

Changing Border Style of Checkboxes in CSS: A Firefox Quirk

Customizing the border of a checkbox with CSS can be a straightforward task. However, when working with Firefox 3.5 and below, you may encounter an unexpected quirk. Despite applying a border style using the "border" property, no visible change appears.

Solution: Using the "outline" Property

To resolve this issue, it is recommended to use the "outline" property instead of "border" when targeting checkboxes (input elements). The "outline" property sets the style of the outline surrounding the element.

Code Example:

The following code snippet demonstrates how to change the border style of a checkbox using the "outline" property:

input[type="checkbox"] {
  outline: 1px solid #1e5180;
}

In this code, we target checkboxes using the "input[type="checkbox"]" selector. The "outline" property is then set with the desired style (1px solid border, color #1e5180).

By employing the "outline" property, you can successfully modify the border appearance of checkboxes in Firefox 3.5 and ensure consistent styling across different browsers.

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