Use Firefox's "Show tab order" feature to debug the focus order interactive elements.
https://www.stefanjudis.com/today-i-learned/how-to-visualize-the-tab-order-without-using-an-extension-in-firefox/
* Focus order is a success criterion defined in the Web Content Accessibility Guidelines * I rediscovered the "Show tabbing order" functionality in Firefox's accessibility dev tools last week * Jecelyn Yeen replied and mentioned that Chrome will have a similar feature starting with Chrome 92 * I'd love to hear about it * Polypane * the Taba11y browser extension and it brings the same functionaliy to Chrome