Kilotest: Violations of code invalid issue for Mozilla Foundation page

Here are the HTML elements reported to violate rules belonging to the code invalid issue.

Basics

About the code invalid issue

Why it matters: Invalid code in the document may prevent a helper from working

Priority: high

Related WCAG standard: 4.1

Violator count: 1

Reported by 1 tool (Html Checker API)

About the Mozilla Foundation page

URL: https://www.mozilla.org/en-US/

Tested by job 6v4 on 2026-04-03 at 03:56

Violators

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  1. Element 626