fix triple-click text selection in firefox

fix triple-click text selection in firefox

diff --git a/app/assets/stylesheets/common/base/topic-post.scss b/app/assets/stylesheets/common/base/topic-post.scss
index f1f8079..72d6501 100644
--- a/app/assets/stylesheets/common/base/topic-post.scss
+++ b/app/assets/stylesheets/common/base/topic-post.scss
@@ -849,12 +849,11 @@ blockquote > *:last-child {
 }
 
 a.mention {
-  align-items: baseline;
-  display: inline-flex;
+  display: inline-block; // https://bugzilla.mozilla.org/show_bug.cgi?id=1656119
   font-weight: bold;
   font-size: 0.93em;
   color: $primary-high-or-secondary-low;
-  padding: 1px 4px;
+  padding: 0 4px 1px;
   background: $primary-low;
   border-radius: 8px;
 }

GitHub sha: 6da90af6