Fix navbar dropdown position in Firefox ESR

static/styles/beluga/style.css

@@ -322,6 +322,7 @@ p.min_padding {
   background: #509599;
   margin-top: 50px;
   z-index: 99999;
+  left: 0;
 }
 
 #menu > ul > .nav_dropdown:hover {

static/styles/genaviv/style.css

@@ -1207,6 +1207,7 @@ td {
   width: 100%;
   z-index: 99999;
   margin-top: 14px;
+  left: 0;
 }
 #nav_links > #links_menu {
   width: 120px;

static/styles/oppai/style.css

@@ -214,6 +214,7 @@ ul.thin li { margin:0px 0px; padding:0px; }
   width: 100%;
   z-index: 99999;
   margin-top: 32px;
+  left: 0;
 }
 
 #nav_links > #links_menu {