2.2.56 [HTML5:2014] Section 7.4.2 Focus management

C0073: Focusable elements follow the platform conventions for accessibility

The specification states:

 7.4.2 Focus management
     ...
     Notwithstanding the above, user agents may make any element or part of an element 
     focusable, especially to aid with accessibility or to better match platform 
     conventions.

All document modes (All versions)

Focusable elements follow the platform conventions for accessibility.