feature: add accessibility attributes

Author: Attacktive

index.html

@@ -50,8 +50,8 @@ <h5 class="text-muted">JavaScript == Comparison Tool</h5>
 
 		<pre id="output" class="row m-1 p-2" aria-live="polite"></pre>
 
-		<footer class="row fixed-bottom pt-1 pe-2 pb-1 text-end">
-			<div id="user-agent" class="col-12"></div>
+		<footer class="row fixed-bottom pt-1 pe-2 pb-1 text-end" role="contentinfo">
+			<div id="user-agent" class="col-12" aria-label="User agent information"></div>
 		</footer>
 	</form>