This quirk doesn't exist in recent Safari versions.

Unfortunately, a real changelog is non-existent for Safari, so
limit this to version 9 and above for now until someone can test
earlier versions.

Fixes Bug: 14207

framework/Browser/lib/Horde/Browser.php

@@ -546,6 +546,9 @@ public function match($userAgent = null, $accept = null)
                     $this->setFeature('accesskey');
                     $this->setFeature('xmlhttpreq');
                 }
+                if ($this->_majorVersion >= 9) {
+                    $this->setQuirk('empty_file_input_value', 0);
+                }
             } else {
                 // Konqueror.
                 $this->setFeature('javascript', 1.1);