Kilotest: Diagnoses of hovering changes content violation by HTML element 149 on Mozilla Foundation page

Here is how tools diagnose the hovering changes content issue for HTML element 149 of the Mozilla Foundation page.

Basics

• About the hovering changes content issue
  • Why it matters: User cannot explore the document reliably with a mouse
  • Priority: lowest
  • Related WCAG standard: 3.2.5
• About the Mozilla Foundation page
  • URL: https://www.mozilla.org/en-US/
  • Tested on 2026-04-03 at 03:56
• About HTML element 149
  • Tag name: A
  • Text: Products
  • Start tag: <a class="m24-c-menu-title" href="/en-US/products/" aria-haspopup="true" aria-controls="m24-c-menu-panel-products" data-testid="m24-navigation-link-products" aria-expanded="false">
  • XPath: /html/body/nav[1]/div[1]/div[1]/div[1]/div[1]/div[1]/ul[1]/li[1]/a[1]
  • Bounding box: x = 857, y = 16, width = 80, height = 23

Diagnoses

1. Hovering over the element changes the related visible element count by 54 in 154ms

   Tool: Testaro (CVS Health)

   Rule: hover