Bug 1671525 - Set explicit line-height on urlbarView-row-inner items so that stray characters from math fonts don't result in huge height. r=dao

Differential Revision: https://phabricator.services.mozilla.com/D120239

browser/themes/shared/urlbarView.inc.css

@@ -95,6 +95,7 @@
 }
 
 .urlbarView-row-inner {
+  line-height: 1.2;
   display: flex;
   flex-wrap: nowrap;
   overflow: hidden;