diff --git a/developer-edition-dark.css b/developer-edition-dark.css
index 56a738e..23d1d2c 100644
--- a/developer-edition-dark.css
+++ b/developer-edition-dark.css
@@ -77,6 +77,10 @@
     { margin-top: 1px; }
     window[uidensity=compact]
     { --tab-min-height: 31px; }
+    
+    #TabsToolbar {
+        margin-bottom: 0px;
+    }
 
     tab[pending] {
         opacity: 0.6;
@@ -88,9 +92,12 @@
     tab[selected] .tab-background {
         border-style: solid;
         border-width: 0 1px;
-        border-image: linear-gradient(to bottom, #C75600 3px, #777 3px, #777 90%, transparent 90%) 1 100%;
+        border-image: linear-gradient(to bottom, #C75600 3px, #777 3px, #777 100%, transparent 100%) 1 100%;
     }
 
+    tab:not([pinned]) {
+        transition: none;
+    }
     tab[selected]:not([pinned]) {
         min-width: 200px;
     }
@@ -98,22 +105,18 @@
     tab[pinned] .tab-content {
         padding: 0 2px 0 10px;
     }
-    tab[pinned]:not([selected]) .tab-background {
-        border-image: linear-gradient(to bottom, #7777 90%, transparent 90%) 1 100%;
-        border-right: 1px solid;
-        border-left: 1px solid;
+    tab[pinned][busy] .tab-content {
+        padding: 0 9px 0 10px;
     }
     tab[pinned]::before { /*left border */
         display: none;
     }
 
     .tab-line
-    { height: 1.7px; }
+    { height: 2px; }
 
     .tab-bottom-line
-    { transform: translateY(-2px); }
-    tab[selected] .tab-bottom-line
-    { transform: translateY(-1px); }
+    { transform: translateY(-.5px); }
 
     .tab-icon-image {
         padding: 5px;
@@ -149,6 +152,7 @@
     .mail-toolbox {
         border-top: 1px solid #777;
         margin-top: -1px;
+        box-shadow: none;
     }
 
     .searchbar-textbox,
diff --git a/extensions-inverted.css b/extensions-inverted.css
index 897d62c..26a9300 100644
--- a/extensions-inverted.css
+++ b/extensions-inverted.css
@@ -13,7 +13,7 @@
 
 @-moz-document
 	regexp("moz-extension://[\w-]+/(crxviewer).html\\b.*"), /* crxviewer  */
-	regexp("moz-extension://[\w-]+/(dashboard|logger-ui|1p-filters|3p-filters|advanced-settings|asset-viewer|background|cloud-ui|dashboard|document-blocked|dyna-rules|epicker|logger-ui|whitelist).html\\b.*"), /* uBlock + uMatrix */
+	regexp("moz-extension://[\w-]+/(1p-filters|3p-filters|advanced-settings|asset-viewer|background|cloud-ui|dashboard|document-blocked|dyna-rules|epicker|hosts-files|logger-ui|user-rules|whitelist).html\\b.*"), /* uBlock + uMatrix */
 	regexp("moz-extension://[\w-]+/(about|settings).html\\b.*") /* general  */
 {