A new <search> element has been added to the HTML specification.
see 4.4.15 The search element
The Finder module template uses the role=search attribute in the form tag.

<form 
   class="mod-finder js-finder-searchform form-search" 
   action="<?php echo Route::_($route); ?>" 
   method="get" 
   role="search">

The incorrect use of the role=search attribute on the form element was pointed out by Adrian Roselli (see Where to Put Your Search Role

I suggest that the Finder module template should be improved:

• use the search tag
• remove the role attribute from the form element
• if the search tag is not used (because it may not yet have good support in browsers and assistive technologies), place the role=search attribute in an additional container (see examples at Adrian Roselli)