It's common practice to sometimes overwrite an element's visual label with aria-label to provide more accessible information. As it turns out, this could break speech recognition software.
Topic: Accessibility – Page 3
em and strong elements are not announced by assistive technologies such as screen readers.
The table cell attribute "headers" allows you to associate multiple header cells which is useful for tables with rows or columns spanning multiple cells.
Enforce pinch-to-zoom for sites that disable it on Chrome/Firefox on Android.
Space and Enter keys trigger button click events. Surprisingly, they both fire at different times.