Kilotest: Diagnoses of aria attribute invalid violation by HTML element 205 on Mozilla Foundation page

Here is how tools diagnose the aria attribute invalid issue for HTML element 205 of the Mozilla Foundation page.

Basics

• About the aria attribute invalid issue
  • Why it matters: Item behavior violates user expectations
  • Priority: highest
  • Related WCAG standard: 4.1.2
• About the Mozilla Foundation page
  • URL: https://www.mozilla.org/en-US/
  • Tested on 2026-04-03 at 03:56
• About HTML element 205
  • Take me there
  • Tag name: A
  • Text: About us
  • Start tag: <a class="m24-c-menu-title" href="/en-US/about/" aria-haspopup="true" aria-controls="m24-c-menu-panel-about" data-testid="m24-navigation-link-about-us" aria-expanded="false">
  • XPath: /html/body/nav[1]/div[1]/div[1]/div[1]/div[1]/div[1]/ul[1]/li[2]/a[1]
  • Bounding box: x = 985, y = 16, width = 78, height = 23

Diagnoses

1. ARIA attributes must conform to valid values; Unable to determine if aria-controls referenced ID exists on the page while using aria-haspopup: aria-controls="m24-c-menu-panel-about"

   Tool: Axe (Deque)

   Rule: aria-valid-attr-value