Fix navbar dropdown position in Firefox ESR

static/styles/beluga/style.css

   background: #509599;
   margin-top: 50px;
   z-index: 99999;
+  left: 0;
 }
 
 #menu > ul > .nav_dropdown:hover {

static/styles/genaviv/style.css

   width: 100%;
   z-index: 99999;
   margin-top: 14px;
+  left: 0;
 }
 #nav_links > #links_menu {
   width: 120px;

static/styles/oppai/style.css

   width: 100%;
   z-index: 99999;
   margin-top: 32px;
+  left: 0;
 }
 
 #nav_links > #links_menu {