diff --git a/CREDITS b/CREDITS
index fd2bc4a..d7b8fbf 100644
--- a/CREDITS
+++ b/CREDITS
@@ -38,6 +38,9 @@ N: Alex Besogonov
 E: Alex.Besogonov@gmail.com
 W: https://github.com/Cyberax
 
+N: aslam karachiwala 
+W: https://github.com/akwala
+
 N: AuRiMaS666
 W: https://github.com/AuRiMaS666
 
@@ -171,6 +174,9 @@ N: menndouyukkuri
 E: menndoukusagari@gmail.com
 W: https://github.com/menndouyukkuri
 
+N: mid-kid 
+W: https://github.com/mid-kid
+
 N: Mizuki
 W: https://github.com/MagicalDrizzle
 
diff --git a/README.org b/README.org
index b254a17..6a6b91c 100644
--- a/README.org
+++ b/README.org
@@ -206,6 +206,7 @@ Thanks to all sponsors & contributors to this project for providing help and dev
 [[https://github.com/Ygg01][@@html:<img width="60" height="60" src="https://avatars.githubusercontent.com/u/1146204?s=60&v=4"/>@@]]
 [[https://github.com/engelju][@@html:<img width="60" height="60" src="https://avatars.githubusercontent.com/u/2188152?s=60&v=4"/>@@]]
 [[https://github.com/xrstf][@@html:<img width="60" height="60" src="https://avatars.githubusercontent.com/u/127499?s=60&v=4"/>@@]]
+[[https://github.com/akwala][@@html:<img width="60" height="60" src="https://avatars.githubusercontent.com/u/1786?s=60&v=4"/>@@]]
 
 - A donation was received on [[https://ko-fi.com/black7375][Ko-Fi]]
   - [[https://ko-fi.com/home/coffeeshop?txid=97e5fa0d-c73e-4308-a2fd-6b44b08cd828][Safira]]
diff --git a/css/leptonChrome.css b/css/leptonChrome.css
index b8e776b..b41fdc3 100644
--- a/css/leptonChrome.css
+++ b/css/leptonChrome.css
@@ -753,6 +753,27 @@
     }
   }
   @media (-moz-platform: windows) {
+    :root:is(:not([lwtheme]), :not(:-moz-lwtheme))
+      #tabbrowser-tabs:not([movingtab])
+      > #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[multiselected]:not([selected]),
+    :root[lwtheme-mozlightdark]
+      #tabbrowser-tabs:not([movingtab])
+      > #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[multiselected]:not([selected]),
+    :root:is(
+        [style*="--lwt-accent-color: rgb(240, 240, 244); --lwt-text-color: rgba(21, 20, 26);"],
+        [style*="--lwt-accent-color: rgb(28, 27, 34); --lwt-text-color: rgba(251, 251, 254);"]
+      )
+      #tabbrowser-tabs:not([movingtab])
+      > #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[multiselected]:not([selected]),
     :root:is(:not([lwtheme]), :not(:-moz-lwtheme))
       #tabbrowser-tabs:not([movingtab])
       > #tabbrowser-arrowscrollbox
@@ -1072,6 +1093,18 @@
     }
     /* Hard Coded */
     @media -moz-pref("userChrome.tab.color_like_toolbar") {
+      :root[lwtheme-mozlightdark][lwt-default-theme-in-dark-mode]
+        #tabbrowser-tabs:not([movingtab])
+        > #pinned-tabs-container
+        > .tabbrowser-tab
+        > .tab-stack
+        > .tab-background[selected],
+      :root[style*="--lwt-accent-color: rgb(28, 27, 34); --lwt-text-color: rgba(251, 251, 254);"][lwt-default-theme-in-dark-mode]
+        #tabbrowser-tabs:not([movingtab])
+        > #pinned-tabs-container
+        > .tabbrowser-tab
+        > .tab-stack
+        > .tab-background[selected],
       :root[lwtheme-mozlightdark][lwt-default-theme-in-dark-mode]
         #tabbrowser-tabs:not([movingtab])
         > #tabbrowser-arrowscrollbox
@@ -4179,6 +4212,7 @@
       margin-inline-start: 0 !important;
     }
   }
+  :root:not([uidensity="touch"]) #pinned-tabs-container,
   :root:not([uidensity="touch"]) #tabbrowser-arrowscrollbox {
     --scrollbtn-inner-padding: 1px;
     --scrollbtn-outer-padding: 3px;
@@ -4223,6 +4257,9 @@
   .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]) {
     max-width: var(--tab-max-width) !important; /* Original: 225px */
   }
+  #tabbrowser-tabs[orient="vertical"][expanded] .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]) {
+    max-width: none !important;
+  }
   #tabbrowser-tabs[orient="horizontal"]
     tab-group[collapsed]
     > .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]) {
@@ -4234,6 +4271,9 @@
   }
   /* neighbouring tabs should "pinch" together */
   :root[customizing="true"] #tabbrowser-arrowscrollbox-periphery,
+  #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
+    > #pinned-tabs-container
+    > #tabbrowser-arrowscrollbox-periphery,
   #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
     > #tabbrowser-arrowscrollbox
     > #tabbrowser-arrowscrollbox-periphery {
@@ -4371,6 +4411,16 @@
       ) !important; /* Prevent overflow pinned tab bottom margin */
     }
     @media not -moz-pref("userChrome.tabbar.multi_row") {
+      :root:not([uidensity="compact"]) #TabsToolbar:not([multibar]) #pinned-tabs-container,
+      #TabsToolbar:not([multibar]) #pinned-tabs-container[overflowing="true"] > .tabbrowser-tab[pinned="true"],
+      #TabsToolbar:not([multibar])
+        #pinned-tabs-container[overflowing="true"]
+        > .tabbrowser-tab[pinned="true"]
+        .tab-stack,
+      #TabsToolbar:not([multibar])
+        #pinned-tabs-container[overflowing="true"]
+        > .tabbrowser-tab[pinned="true"]
+        .tab-content,
       :root:not([uidensity="compact"]) #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox,
       #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox[overflowing="true"] > .tabbrowser-tab[pinned="true"],
       #TabsToolbar:not([multibar])
@@ -4383,12 +4433,14 @@
         .tab-content {
         max-height: var(--tab-min-height) !important; /* Force apply height */
       }
+      :root[uidensity="compact"] #TabsToolbar:not([multibar]) #pinned-tabs-container,
       :root[uidensity="compact"] #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox {
         height: var(--tab-min-height) !important;
       }
     }
   }
   /* Scroll Button - Size Fix */
+  :root #pinned-tabs-container,
   :root #tabbrowser-arrowscrollbox {
     --scrollbtn-vertical-padding: 3px;
     --scrollbtn-vertical-border: 2px;
@@ -4483,11 +4535,13 @@
 }
 @media -moz-pref("userChrome.padding.urlView_expanding") or -moz-pref("userChrome.urlView.as_commandbar") {
   #urlbar[breakout][breakout-extend] {
-    top: calc((var(--urlbar-toolbar-height, var(--urlbar-container-height)) - var(--urlbar-height)) / 2) !important;
-    left: 0 !important;
-    width: 100% !important;
+    top: calc(var(--urlbar-container-height) * 2 - var(--urlbar-height)) !important;
+    width: var(--urlbar-width) !important;
+    position: relative !important;
+    margin: 0 !important;
   }
-  #urlbar[breakout][breakout-extend] > #urlbar-input-container {
+  #urlbar[breakout][breakout-extend] > #urlbar-input-container,
+  #urlbar[breakout][breakout-extend] > .urlbar-input-container {
     height: var(--urlbar-height) !important;
     padding-block: 0 !important;
     padding-inline: var(--urlbar-container-padding, 0px) !important;
@@ -6729,6 +6783,7 @@
     width: 100%;
   }
   /* Pinned */
+  #tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned][selected="true"],
   #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned][selected="true"] {
     position: relative !important;
   }
@@ -6748,18 +6803,22 @@
   }
   /* Padding */
   @media not -moz-pref("userChrome.centered.tab") {
+    #pinned-tabs-container,
     #tabbrowser-arrowscrollbox {
       margin-inline: 2px !important;
     }
+    :root[sizemode="normal"] #pinned-tabs-container,
     :root[sizemode="normal"] #tabbrowser-arrowscrollbox {
       margin-inline: 6px !important;
     }
   }
   @media -moz-pref("userChrome.centered.tab") {
     @media -moz-pref("userChrome.centered.tab.label") {
+      #pinned-tabs-container,
       #tabbrowser-arrowscrollbox {
         margin-inline: 2px !important;
       }
+      :root[sizemode="normal"] #pinned-tabs-container,
       :root[sizemode="normal"] #tabbrowser-arrowscrollbox {
         margin-inline: 6px !important;
       }
@@ -6804,6 +6863,7 @@
     }
   }
   .scrollbox-clip[orient="horizontal"],
+  #pinned-tabs-container,
   #tabbrowser-arrowscrollbox {
     overflow: -moz-hidden-unscrollable;
     display: block;
@@ -6881,6 +6941,7 @@
     > #tabs-newtab-button {
     z-index: 2 !important;
   }
+  #tabbrowser-tabs[closebuttons="activetab"][hasadjacentnewtabbutton="true"] #pinned-tabs-container,
   #tabbrowser-tabs[closebuttons="activetab"][hasadjacentnewtabbutton="true"] #tabbrowser-arrowscrollbox {
     padding-inline-end: calc(
       16px + (var(--toolbarbutton-inner-padding) + var(--toolbarbutton-outer-padding)) * 2
@@ -6898,6 +6959,16 @@
 /** Tab UI ********************************************************************/
 /*= Tab - Connect to window ==============================================*/
 @media -moz-pref("userChrome.tab.connect_to_window") {
+  #TabsToolbar #tabbrowser-tabs:not([orient="vertical"]) {
+    max-height: var(--tab-min-height);
+  }
+  #TabsToolbar #tabbrowser-tabs:not([orient="vertical"])[movingtab] {
+    padding-bottom: unset !important;
+    margin-bottom: unset !important;
+  }
+  #TabsToolbar[multibar] #tabbrowser-tabs:not([orient="vertical"]) {
+    max-height: var(--tab-min-height_mlt);
+  }
   #tabbrowser-tabs:not([orient="vertical"]) {
     min-height: unset !important; /* Original: var(--tabstrip-min-height) */
   }
@@ -6929,9 +7000,11 @@
     }
   }
   /* Pinned Tab - tabbrowser-arrowscrollbox overflowing */
+  #tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned],
   #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned] {
     z-index: 0 !important;
   }
+  #tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned] .tab-stack,
   #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned] .tab-stack {
     /* Temporary solution for compatibility #513 */
     overflow-y: clip;
@@ -6966,6 +7039,26 @@
   .tab-background:is([selected], [multiselected]) {
     background-color: var(--tab-selected-bgcolor, var(--toolbar-bgcolor)) !important;
   }
+  :root:is(:-moz-lwtheme, [lwtheme]) #pinned-tabs-container > .tabbrowser-tab > .tab-stack > .tab-background[selected],
+  :root:is(:-moz-lwtheme, [lwtheme])
+    #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
+  :root:is(:-moz-lwtheme, [lwtheme])
+    #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
+  :root:is(:-moz-lwtheme, [lwtheme])
+    #tabbrowser-tabs[orient="horizontal"]:not([movingtab])
+    > #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
   :root:is(:-moz-lwtheme, [lwtheme])
     #tabbrowser-arrowscrollbox
     > .tabbrowser-tab
@@ -6999,6 +7092,30 @@
     background-repeat: repeat-x, repeat-x, no-repeat !important;
   }
   @media -moz-pref("userChrome.theme.transparent.frame") {
+    :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+      #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected],
+    :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+      #tabbrowser-tabs:not([movingtab])
+      > #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected],
+    :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+      #pinned-tabs-container
+      > tab-group
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected],
+    :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+      #tabbrowser-tabs[orient="horizontal"]:not([movingtab])
+      > #pinned-tabs-container
+      > tab-group
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected],
     :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
       #tabbrowser-arrowscrollbox
       > .tabbrowser-tab
@@ -7040,6 +7157,17 @@
   #vertical-tabs[brighttext] {
     --uc-multiselected-tab-bgcolor: color-mix(in srgb, currentColor 16%, var(--toolbar-bgcolor, transparent));
   }
+  #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
+  #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
   #tabbrowser-tabs:not([movingtab])
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab
@@ -7723,12 +7851,14 @@
 /*= Unselected Tab - Divide line =============================================*/
 /*= Unselected Tab - Dynamic Separator =======================================*/
 @media -moz-pref("userChrome.tab.dynamic_separator") {
+  #pinned-tabs-container,
   #tabbrowser-arrowscrollbox {
     --start-tab-separator-position-x: -1.5px;
     --end-tab-separator-position-x: 1.5px;
     --tab-separator-position-x: -2.5px;
     --tab-separator-position-y: calc(-50% + 1px);
   }
+  #pinned-tabs-container:-moz-locale-dir(rtl),
   #tabbrowser-arrowscrollbox:-moz-locale-dir(rtl) {
     --start-tab-separator-position-x: 1.5px;
     --end-tab-separator-position-x: -1.5px;
@@ -7801,6 +7931,12 @@
       transform: translateX(var(--end-tab-separator-position-x)) translateY(var(--tab-separator-position-y)) !important;
     }
   }
+  #pinned-tabs-container:not([orient="vertical"]):not(:empty):not(
+      :has(.tabbrowser-tab[pinned]:is([visuallyselected], [multiselected], :hover):last-of-type)
+    )
+    ~ #tabbrowser-arrowscrollbox:not([orient="vertical"])
+    .tabbrowser-tab:not([visuallyselected], [multiselected], :hover):first-of-type
+    .tab-stack::before,
   #tabbrowser-tabs:not([orient="vertical"])
     .tabbrowser-tab:not([visuallyselected], [multiselected], :hover, :first-of-type)
     .tab-stack::before {
@@ -8273,6 +8409,10 @@
     --tab-label-mask-size: 25%;
   }
   .tabbrowser-tab[visuallyselected]:not([labelendaligned]):hover .tab-label-container,
+  #tabbrowser-tabs:not([closebuttons="activetab"])
+    > #pinned-tabs-container
+    > .tabbrowser-tab:not([visuallyselected], [labelendaligned]):hover
+    .tab-label-container,
   #tabbrowser-tabs:not([closebuttons="activetab"])
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab:not([visuallyselected], [labelendaligned]):hover
@@ -8282,6 +8422,12 @@
 }
 /** Clipped tabs - Show close button at hover *********************************/
 @media -moz-pref("userChrome.tab.close_button_at_hover") {
+  #tabbrowser-tabs[closebuttons="activetab"]
+    > #pinned-tabs-container
+    > .tabbrowser-tab:not([pinned])
+    > .tab-stack
+    > .tab-content
+    > .tab-close-button:not([selected]),
   #tabbrowser-tabs[closebuttons="activetab"]
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab:not([pinned])
@@ -11997,6 +12143,28 @@
     #sidebarMenu-popup > *:is(menuitem)[data-l10n-id="sidebar-menu-close"] {
       --menuitem-image: url("chrome://global/skin/icons/close.svg");
     }
+    /*= sidebar-context-menu =====================================================*/
+    #sidebar-context-menu-manage-extension {
+      --menuitem-image: url("chrome://global/skin/icons/settings.svg");
+    }
+    #sidebar-context-menu-remove-extension {
+      --menuitem-image: url("chrome://global/skin/icons/delete.svg");
+    }
+    #sidebar-context-menu-report-extension {
+      --menuitem-image: url("../icons/send.svg");
+    }
+    #sidebar-context-menu-unpin-extension {
+      --menuitem-image: url("../icons/unpin-tab.svg");
+    }
+    #sidebar-context-menu-hide-sidebar {
+      --menuitem-image: url("../icons/eye-hide.svg");
+    }
+    #sidebar-context-menu-customize-sidebar {
+      --menuitem-image: url("chrome://browser/skin/customize.svg");
+    }
+    #sidebar-context-menu-enable-vertical-tabs {
+      --menuitem-image: url("chrome://browser/skin/sidebar-collapsed.svg");
+    }
     /*= chrome://browser/content/syncedtabs/sidebar.xhtml ========================*/
     .item.client[clientType="phone"] > .item-title-container > .item-icon-container {
       background-image: url("../icons/device-phone.svg") !important;
@@ -12059,7 +12227,8 @@
         #menu_ToolsPopup,
         #windowPopup,
         #menu_HelpPopup,
-        #usercssloader-menupopup
+        #usercssloader-menupopup,
+        #sidebar-context-menu
       )
       menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
     menupopup:is(
@@ -12073,7 +12242,8 @@
         #menu_ToolsPopup,
         #windowPopup,
         #menu_HelpPopup,
-        #usercssloader-menupopup
+        #usercssloader-menupopup,
+        #sidebar-context-menu
       )
       menu:not(.menu-iconic, .in-menulist, [checked="true"]),
     menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -12147,7 +12317,8 @@
         #menu_ToolsPopup,
         #windowPopup,
         #menu_HelpPopup,
-        #usercssloader-menupopup
+        #usercssloader-menupopup,
+        #sidebar-context-menu
       )
       menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
     menupopup:is(
@@ -12161,7 +12332,8 @@
         #menu_ToolsPopup,
         #windowPopup,
         #menu_HelpPopup,
-        #usercssloader-menupopup
+        #usercssloader-menupopup,
+        #sidebar-context-menu
       )
       menu:not(.menu-iconic, .in-menulist, [checked="true"]),
     menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -12255,7 +12427,8 @@
           #menu_ToolsPopup,
           #windowPopup,
           #menu_HelpPopup,
-          #usercssloader-menupopup
+          #usercssloader-menupopup,
+          #sidebar-context-menu
         )
         menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
       menupopup:is(
@@ -12269,7 +12442,8 @@
           #menu_ToolsPopup,
           #windowPopup,
           #menu_HelpPopup,
-          #usercssloader-menupopup
+          #usercssloader-menupopup,
+          #sidebar-context-menu
         )
         menu:not(.menu-iconic, .in-menulist, [checked="true"]),
       menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -12326,7 +12500,8 @@
               #menu_ToolsPopup,
               #windowPopup,
               #menu_HelpPopup,
-              #usercssloader-menupopup
+              #usercssloader-menupopup,
+              #sidebar-context-menu
             )
             menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
           menupopup:is(
@@ -12340,7 +12515,8 @@
               #menu_ToolsPopup,
               #windowPopup,
               #menu_HelpPopup,
-              #usercssloader-menupopup
+              #usercssloader-menupopup,
+              #sidebar-context-menu
             )
             menu:not(.menu-iconic, .in-menulist, [checked="true"]),
           menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -12434,7 +12610,8 @@
             #menu_ToolsPopup,
             #windowPopup,
             #menu_HelpPopup,
-            #usercssloader-menupopup
+            #usercssloader-menupopup,
+            #sidebar-context-menu
           )
           menuitem:not(.menuitem-iconic, .bookmark-item),
         menupopup:is(
@@ -12448,7 +12625,8 @@
             #menu_ToolsPopup,
             #windowPopup,
             #menu_HelpPopup,
-            #usercssloader-menupopup
+            #usercssloader-menupopup,
+            #sidebar-context-menu
           )
           menu:not(.menu-iconic) {
           list-style-image: var(--menuitem-image, url("../icons/blank.svg")) !important;
@@ -12763,6 +12941,12 @@
       #toolbar-context-undoCloseTab {
         --menuitem-image: url("../icons/undo.svg");
       }
+      #toolbar-context-customize-sidebar {
+        --menuitem-image: url("chrome://browser/skin/customize.svg");
+      }
+      #toolbar-context-toggle-vertical-tabs {
+        --menuitem-image: url("chrome://browser/skin/sidebar-collapsed.svg");
+      }
       #toggle_toolbar-menubar {
         /* checkbox */
         --menuitem-image: url("../icons/calendar-agenda.svg");
@@ -14910,6 +15094,27 @@
   }
 }
 @media (-moz-bool-pref: "userChrome.theme.system_default") and (-moz-platform: windows) {
+  :root:is(:not([lwtheme]), :not(:-moz-lwtheme))
+    #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
+  :root[lwtheme-mozlightdark]
+    #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
+  :root:is(
+      [style*="--lwt-accent-color: rgb(240, 240, 244); --lwt-text-color: rgba(21, 20, 26);"],
+      [style*="--lwt-accent-color: rgb(28, 27, 34); --lwt-text-color: rgba(251, 251, 254);"]
+    )
+    #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
   :root:is(:not([lwtheme]), :not(:-moz-lwtheme))
     #tabbrowser-tabs:not([movingtab])
     > #tabbrowser-arrowscrollbox
@@ -15241,6 +15446,18 @@
   }
 }
 @media (-moz-bool-pref: "userChrome.theme.system_default") and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled") and (-moz-bool-pref: "userChrome.tab.color_like_toolbar") {
+  :root[lwtheme-mozlightdark][lwt-default-theme-in-dark-mode]
+    #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
+  :root[style*="--lwt-accent-color: rgb(28, 27, 34); --lwt-text-color: rgba(251, 251, 254);"][lwt-default-theme-in-dark-mode]
+    #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
   :root[lwtheme-mozlightdark][lwt-default-theme-in-dark-mode]
     #tabbrowser-tabs:not([movingtab])
     > #tabbrowser-arrowscrollbox
@@ -18492,6 +18709,7 @@
   }
 }
 @media (-moz-bool-pref: "userChrome.padding.tabbar_width") {
+  :root:not([uidensity="touch"]) #pinned-tabs-container,
   :root:not([uidensity="touch"]) #tabbrowser-arrowscrollbox {
     --scrollbtn-inner-padding: 1px;
     --scrollbtn-outer-padding: 3px;
@@ -18539,6 +18757,9 @@
   .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]) {
     max-width: var(--tab-max-width) !important; /* Original: 225px */
   }
+  #tabbrowser-tabs[orient="vertical"][expanded] .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]) {
+    max-width: none !important;
+  }
   #tabbrowser-tabs[orient="horizontal"]
     tab-group[collapsed]
     > .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]) {
@@ -18551,6 +18772,9 @@
 }
 @media (-moz-bool-pref: "userChrome.padding.tabbar_width") {
   :root[customizing="true"] #tabbrowser-arrowscrollbox-periphery,
+  #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
+    > #pinned-tabs-container
+    > #tabbrowser-arrowscrollbox-periphery,
   #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
     > #tabbrowser-arrowscrollbox
     > #tabbrowser-arrowscrollbox-periphery {
@@ -18695,6 +18919,10 @@
   }
 }
 @media (-moz-bool-pref: "userChrome.padding.tabbar_height") and (-moz-bool-pref: "userChrome.tab.connect_to_window") and (not (-moz-bool-pref: "userChrome.tabbar.multi_row")) {
+  :root:not([uidensity="compact"]) #TabsToolbar:not([multibar]) #pinned-tabs-container,
+  #TabsToolbar:not([multibar]) #pinned-tabs-container[overflowing="true"] > .tabbrowser-tab[pinned="true"],
+  #TabsToolbar:not([multibar]) #pinned-tabs-container[overflowing="true"] > .tabbrowser-tab[pinned="true"] .tab-stack,
+  #TabsToolbar:not([multibar]) #pinned-tabs-container[overflowing="true"] > .tabbrowser-tab[pinned="true"] .tab-content,
   :root:not([uidensity="compact"]) #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox,
   #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox[overflowing="true"] > .tabbrowser-tab[pinned="true"],
   #TabsToolbar:not([multibar])
@@ -18707,11 +18935,13 @@
     .tab-content {
     max-height: var(--tab-min-height) !important; /* Force apply height */
   }
+  :root[uidensity="compact"] #TabsToolbar:not([multibar]) #pinned-tabs-container,
   :root[uidensity="compact"] #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox {
     height: var(--tab-min-height) !important;
   }
 }
 @media (-moz-bool-pref: "userChrome.padding.tabbar_height") {
+  :root #pinned-tabs-container,
   :root #tabbrowser-arrowscrollbox {
     --scrollbtn-vertical-padding: 3px;
     --scrollbtn-vertical-border: 2px;
@@ -18808,11 +19038,13 @@
 }
 @media (-moz-bool-pref: "userChrome.padding.urlView_expanding"), (-moz-bool-pref: "userChrome.urlView.as_commandbar") {
   #urlbar[breakout][breakout-extend] {
-    top: calc((var(--urlbar-toolbar-height, var(--urlbar-container-height)) - var(--urlbar-height)) / 2) !important;
-    left: 0 !important;
-    width: 100% !important;
+    top: calc(var(--urlbar-container-height) * 2 - var(--urlbar-height)) !important;
+    width: var(--urlbar-width) !important;
+    position: relative !important;
+    margin: 0 !important;
   }
-  #urlbar[breakout][breakout-extend] > #urlbar-input-container {
+  #urlbar[breakout][breakout-extend] > #urlbar-input-container,
+  #urlbar[breakout][breakout-extend] > .urlbar-input-container {
     height: var(--urlbar-height) !important;
     padding-block: 0 !important;
     padding-inline: var(--urlbar-container-padding, 0px) !important;
@@ -21479,6 +21711,7 @@
     width: 100%;
   }
   /* Pinned */
+  #tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned][selected="true"],
   #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned][selected="true"] {
     position: relative !important;
   }
@@ -21499,17 +21732,21 @@
   /* Padding */
 }
 @media (-moz-bool-pref: "userChrome.tabbar.as_titlebar") and (not (-moz-bool-pref: "userChrome.centered.tab")) {
+  #pinned-tabs-container,
   #tabbrowser-arrowscrollbox {
     margin-inline: 2px !important;
   }
+  :root[sizemode="normal"] #pinned-tabs-container,
   :root[sizemode="normal"] #tabbrowser-arrowscrollbox {
     margin-inline: 6px !important;
   }
 }
 @media (-moz-bool-pref: "userChrome.tabbar.as_titlebar") and (-moz-bool-pref: "userChrome.centered.tab") and (-moz-bool-pref: "userChrome.centered.tab.label") {
+  #pinned-tabs-container,
   #tabbrowser-arrowscrollbox {
     margin-inline: 2px !important;
   }
+  :root[sizemode="normal"] #pinned-tabs-container,
   :root[sizemode="normal"] #tabbrowser-arrowscrollbox {
     margin-inline: 6px !important;
   }
@@ -21552,6 +21789,7 @@
     }
   }
   .scrollbox-clip[orient="horizontal"],
+  #pinned-tabs-container,
   #tabbrowser-arrowscrollbox {
     overflow: -moz-hidden-unscrollable;
     display: block;
@@ -21629,6 +21867,7 @@
     > #tabs-newtab-button {
     z-index: 2 !important;
   }
+  #tabbrowser-tabs[closebuttons="activetab"][hasadjacentnewtabbutton="true"] #pinned-tabs-container,
   #tabbrowser-tabs[closebuttons="activetab"][hasadjacentnewtabbutton="true"] #tabbrowser-arrowscrollbox {
     padding-inline-end: calc(
       16px + (var(--toolbarbutton-inner-padding) + var(--toolbarbutton-outer-padding)) * 2
@@ -21646,6 +21885,16 @@
 /** Tab UI ********************************************************************/
 /*= Tab - Connect to window ==============================================*/
 @media (-moz-bool-pref: "userChrome.tab.connect_to_window") {
+  #TabsToolbar #tabbrowser-tabs:not([orient="vertical"]) {
+    max-height: var(--tab-min-height);
+  }
+  #TabsToolbar #tabbrowser-tabs:not([orient="vertical"])[movingtab] {
+    padding-bottom: unset !important;
+    margin-bottom: unset !important;
+  }
+  #TabsToolbar[multibar] #tabbrowser-tabs:not([orient="vertical"]) {
+    max-height: var(--tab-min-height_mlt);
+  }
   #tabbrowser-tabs:not([orient="vertical"]) {
     min-height: unset !important; /* Original: var(--tabstrip-min-height) */
   }
@@ -21680,9 +21929,11 @@
   }
 }
 @media (-moz-bool-pref: "userChrome.tab.connect_to_window") {
+  #tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned],
   #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned] {
     z-index: 0 !important;
   }
+  #tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned] .tab-stack,
   #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned] .tab-stack {
     /* Temporary solution for compatibility #513 */
     overflow-y: clip;
@@ -21718,6 +21969,26 @@
   .tab-background:is([selected], [multiselected]) {
     background-color: var(--tab-selected-bgcolor, var(--toolbar-bgcolor)) !important;
   }
+  :root:is(:-moz-lwtheme, [lwtheme]) #pinned-tabs-container > .tabbrowser-tab > .tab-stack > .tab-background[selected],
+  :root:is(:-moz-lwtheme, [lwtheme])
+    #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
+  :root:is(:-moz-lwtheme, [lwtheme])
+    #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
+  :root:is(:-moz-lwtheme, [lwtheme])
+    #tabbrowser-tabs[orient="horizontal"]:not([movingtab])
+    > #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
   :root:is(:-moz-lwtheme, [lwtheme])
     #tabbrowser-arrowscrollbox
     > .tabbrowser-tab
@@ -21752,6 +22023,30 @@
   }
 }
 @media (-moz-bool-pref: "userChrome.tab.color_like_toolbar") and (-moz-bool-pref: "userChrome.theme.transparent.frame") {
+  :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+    #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
+  :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+    #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
+  :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+    #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
+  :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+    #tabbrowser-tabs[orient="horizontal"]:not([movingtab])
+    > #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
   :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
     #tabbrowser-arrowscrollbox
     > .tabbrowser-tab
@@ -21792,6 +22087,17 @@
   #vertical-tabs[brighttext] {
     --uc-multiselected-tab-bgcolor: color-mix(in srgb, currentColor 16%, var(--toolbar-bgcolor, transparent));
   }
+  #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
+  #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
   #tabbrowser-tabs:not([movingtab])
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab
@@ -22606,12 +22912,14 @@
 /*= Unselected Tab - Divide line =============================================*/
 /*= Unselected Tab - Dynamic Separator =======================================*/
 @media (-moz-bool-pref: "userChrome.tab.dynamic_separator") {
+  #pinned-tabs-container,
   #tabbrowser-arrowscrollbox {
     --start-tab-separator-position-x: -1.5px;
     --end-tab-separator-position-x: 1.5px;
     --tab-separator-position-x: -2.5px;
     --tab-separator-position-y: calc(-50% + 1px);
   }
+  #pinned-tabs-container:-moz-locale-dir(rtl),
   #tabbrowser-arrowscrollbox:-moz-locale-dir(rtl) {
     --start-tab-separator-position-x: 1.5px;
     --end-tab-separator-position-x: -1.5px;
@@ -22694,6 +23002,12 @@
   }
 }
 @media (-moz-bool-pref: "userChrome.tab.dynamic_separator") {
+  #pinned-tabs-container:not([orient="vertical"]):not(:empty):not(
+      :has(.tabbrowser-tab[pinned]:is([visuallyselected], [multiselected], :hover):last-of-type)
+    )
+    ~ #tabbrowser-arrowscrollbox:not([orient="vertical"])
+    .tabbrowser-tab:not([visuallyselected], [multiselected], :hover):first-of-type
+    .tab-stack::before,
   #tabbrowser-tabs:not([orient="vertical"])
     .tabbrowser-tab:not([visuallyselected], [multiselected], :hover, :first-of-type)
     .tab-stack::before {
@@ -23183,6 +23497,10 @@
     --tab-label-mask-size: 25%;
   }
   .tabbrowser-tab[visuallyselected]:not([labelendaligned]):hover .tab-label-container,
+  #tabbrowser-tabs:not([closebuttons="activetab"])
+    > #pinned-tabs-container
+    > .tabbrowser-tab:not([visuallyselected], [labelendaligned]):hover
+    .tab-label-container,
   #tabbrowser-tabs:not([closebuttons="activetab"])
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab:not([visuallyselected], [labelendaligned]):hover
@@ -23192,6 +23510,12 @@
 }
 /** Clipped tabs - Show close button at hover *********************************/
 @media (-moz-bool-pref: "userChrome.tab.close_button_at_hover") {
+  #tabbrowser-tabs[closebuttons="activetab"]
+    > #pinned-tabs-container
+    > .tabbrowser-tab:not([pinned])
+    > .tab-stack
+    > .tab-content
+    > .tab-close-button:not([selected]),
   #tabbrowser-tabs[closebuttons="activetab"]
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab:not([pinned])
@@ -26637,6 +26961,7 @@
   /*= protections-popup ========================================================*/
   /*= identity-popup ===========================================================*/
   /*= sidebarMenu-popup ========================================================*/
+  /*= sidebar-context-menu =====================================================*/
   /*= chrome://browser/content/syncedtabs/sidebar.xhtml ========================*/
   /*= unified-extensions-view ===================================================*/
   /*= Compatibility ============================================================*/
@@ -27521,6 +27846,41 @@
     --menuitem-image: url("chrome://global/skin/icons/close.svg");
   }
 }
+@media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.panel") {
+  #sidebar-context-menu-manage-extension {
+    --menuitem-image: url("chrome://global/skin/icons/settings.svg");
+  }
+}
+@media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.panel") {
+  #sidebar-context-menu-remove-extension {
+    --menuitem-image: url("chrome://global/skin/icons/delete.svg");
+  }
+}
+@media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.panel") {
+  #sidebar-context-menu-report-extension {
+    --menuitem-image: url("../icons/send.svg");
+  }
+}
+@media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.panel") {
+  #sidebar-context-menu-unpin-extension {
+    --menuitem-image: url("../icons/unpin-tab.svg");
+  }
+}
+@media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.panel") {
+  #sidebar-context-menu-hide-sidebar {
+    --menuitem-image: url("../icons/eye-hide.svg");
+  }
+}
+@media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.panel") {
+  #sidebar-context-menu-customize-sidebar {
+    --menuitem-image: url("chrome://browser/skin/customize.svg");
+  }
+}
+@media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.panel") {
+  #sidebar-context-menu-enable-vertical-tabs {
+    --menuitem-image: url("chrome://browser/skin/sidebar-collapsed.svg");
+  }
+}
 @media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.panel") {
   .item.client[clientType="phone"] > .item-title-container > .item-icon-container {
     background-image: url("../icons/device-phone.svg") !important;
@@ -27593,7 +27953,8 @@
       #menu_ToolsPopup,
       #windowPopup,
       #menu_HelpPopup,
-      #usercssloader-menupopup
+      #usercssloader-menupopup,
+      #sidebar-context-menu
     )
     menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
   menupopup:is(
@@ -27607,7 +27968,8 @@
       #menu_ToolsPopup,
       #windowPopup,
       #menu_HelpPopup,
-      #usercssloader-menupopup
+      #usercssloader-menupopup,
+      #sidebar-context-menu
     )
     menu:not(.menu-iconic, .in-menulist, [checked="true"]),
   menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -27700,7 +28062,8 @@
       #menu_ToolsPopup,
       #windowPopup,
       #menu_HelpPopup,
-      #usercssloader-menupopup
+      #usercssloader-menupopup,
+      #sidebar-context-menu
     )
     menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
   menupopup:is(
@@ -27714,7 +28077,8 @@
       #menu_ToolsPopup,
       #windowPopup,
       #menu_HelpPopup,
-      #usercssloader-menupopup
+      #usercssloader-menupopup,
+      #sidebar-context-menu
     )
     menu:not(.menu-iconic, .in-menulist, [checked="true"]),
   menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -27807,7 +28171,8 @@
       #menu_ToolsPopup,
       #windowPopup,
       #menu_HelpPopup,
-      #usercssloader-menupopup
+      #usercssloader-menupopup,
+      #sidebar-context-menu
     )
     menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
   menupopup:is(
@@ -27821,7 +28186,8 @@
       #menu_ToolsPopup,
       #windowPopup,
       #menu_HelpPopup,
-      #usercssloader-menupopup
+      #usercssloader-menupopup,
+      #sidebar-context-menu
     )
     menu:not(.menu-iconic, .in-menulist, [checked="true"]),
   menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -27874,7 +28240,8 @@
       #menu_ToolsPopup,
       #windowPopup,
       #menu_HelpPopup,
-      #usercssloader-menupopup
+      #usercssloader-menupopup,
+      #sidebar-context-menu
     )
     menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
   menupopup:is(
@@ -27888,7 +28255,8 @@
       #menu_ToolsPopup,
       #windowPopup,
       #menu_HelpPopup,
-      #usercssloader-menupopup
+      #usercssloader-menupopup,
+      #sidebar-context-menu
     )
     menu:not(.menu-iconic, .in-menulist, [checked="true"]),
   menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -27976,7 +28344,8 @@
       #menu_ToolsPopup,
       #windowPopup,
       #menu_HelpPopup,
-      #usercssloader-menupopup
+      #usercssloader-menupopup,
+      #sidebar-context-menu
     )
     menuitem:not(.menuitem-iconic, .bookmark-item),
   menupopup:is(
@@ -27990,7 +28359,8 @@
       #menu_ToolsPopup,
       #windowPopup,
       #menu_HelpPopup,
-      #usercssloader-menupopup
+      #usercssloader-menupopup,
+      #sidebar-context-menu
     )
     menu:not(.menu-iconic) {
     list-style-image: var(--menuitem-image, url("../icons/blank.svg")) !important;
@@ -28362,6 +28732,16 @@
     --menuitem-image: url("../icons/undo.svg");
   }
 }
+@media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.menu") and (-moz-bool-pref: "userChrome.icon.context_menu") {
+  #toolbar-context-customize-sidebar {
+    --menuitem-image: url("chrome://browser/skin/customize.svg");
+  }
+}
+@media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.menu") and (-moz-bool-pref: "userChrome.icon.context_menu") {
+  #toolbar-context-toggle-vertical-tabs {
+    --menuitem-image: url("chrome://browser/skin/sidebar-collapsed.svg");
+  }
+}
 @media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.menu") and (-moz-bool-pref: "userChrome.icon.context_menu") {
   #toggle_toolbar-menubar {
     /* checkbox */
diff --git a/css/leptonChromeESR.css b/css/leptonChromeESR.css
index c8e0940..db45d93 100644
--- a/css/leptonChromeESR.css
+++ b/css/leptonChromeESR.css
@@ -456,6 +456,7 @@
       appearance: auto !important;
       -moz-default-appearance: -moz-window-titlebar !important;
     }
+    :root:is([tabsintitlebar], [customtitlebar]):not(:-moz-lwtheme) #pinned-tabs-container,
     :root:is([tabsintitlebar], [customtitlebar]):not(:-moz-lwtheme) #tabbrowser-arrowscrollbox {
       color: -moz-dialogtext !important;
     }
@@ -975,6 +976,27 @@
     }
   }
   @media (-moz-os-version: windows-win10), (-moz-platform: windows-win10) {
+    :root:is(:not([lwtheme]), :not(:-moz-lwtheme))
+      #tabbrowser-tabs:not([movingtab])
+      > #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[multiselected]:not([selected]),
+    :root[lwtheme-mozlightdark]
+      #tabbrowser-tabs:not([movingtab])
+      > #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[multiselected]:not([selected]),
+    :root:is(
+        [style*="--lwt-accent-color: rgb(240, 240, 244); --lwt-text-color: rgba(21, 20, 26);"],
+        [style*="--lwt-accent-color: rgb(28, 27, 34); --lwt-text-color: rgba(251, 251, 254);"]
+      )
+      #tabbrowser-tabs:not([movingtab])
+      > #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[multiselected]:not([selected]),
     :root:is(:not([lwtheme]), :not(:-moz-lwtheme))
       #tabbrowser-tabs:not([movingtab])
       > #tabbrowser-arrowscrollbox
@@ -1294,6 +1316,18 @@
     }
     /* Hard Coded */
     @supports -moz-bool-pref("userChrome.tab.color_like_toolbar") {
+      :root[lwtheme-mozlightdark][lwt-default-theme-in-dark-mode]
+        #tabbrowser-tabs:not([movingtab])
+        > #pinned-tabs-container
+        > .tabbrowser-tab
+        > .tab-stack
+        > .tab-background[selected],
+      :root[style*="--lwt-accent-color: rgb(28, 27, 34); --lwt-text-color: rgba(251, 251, 254);"][lwt-default-theme-in-dark-mode]
+        #tabbrowser-tabs:not([movingtab])
+        > #pinned-tabs-container
+        > .tabbrowser-tab
+        > .tab-stack
+        > .tab-background[selected],
       :root[lwtheme-mozlightdark][lwt-default-theme-in-dark-mode]
         #tabbrowser-tabs:not([movingtab])
         > #tabbrowser-arrowscrollbox
@@ -4502,6 +4536,7 @@
       margin-inline-start: 0 !important;
     }
   }
+  :root:not([uidensity="touch"]) #pinned-tabs-container,
   :root:not([uidensity="touch"]) #tabbrowser-arrowscrollbox {
     --scrollbtn-inner-padding: 1px;
     --scrollbtn-outer-padding: 3px;
@@ -4546,6 +4581,9 @@
   .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]) {
     max-width: var(--tab-max-width) !important; /* Original: 225px */
   }
+  #tabbrowser-tabs[orient="vertical"][expanded] .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]) {
+    max-width: none !important;
+  }
   #tabbrowser-tabs[orient="horizontal"]
     tab-group[collapsed]
     > .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]) {
@@ -4557,6 +4595,9 @@
   }
   /* neighbouring tabs should "pinch" together */
   :root[customizing="true"] #tabbrowser-arrowscrollbox-periphery,
+  #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
+    > #pinned-tabs-container
+    > #tabbrowser-arrowscrollbox-periphery,
   #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
     > #tabbrowser-arrowscrollbox
     > #tabbrowser-arrowscrollbox-periphery {
@@ -4716,6 +4757,16 @@
       ) !important; /* Prevent overflow pinned tab bottom margin */
     }
     @supports not -moz-bool-pref("userChrome.tabbar.multi_row") {
+      :root:not([uidensity="compact"]) #TabsToolbar:not([multibar]) #pinned-tabs-container,
+      #TabsToolbar:not([multibar]) #pinned-tabs-container[overflowing="true"] > .tabbrowser-tab[pinned="true"],
+      #TabsToolbar:not([multibar])
+        #pinned-tabs-container[overflowing="true"]
+        > .tabbrowser-tab[pinned="true"]
+        .tab-stack,
+      #TabsToolbar:not([multibar])
+        #pinned-tabs-container[overflowing="true"]
+        > .tabbrowser-tab[pinned="true"]
+        .tab-content,
       :root:not([uidensity="compact"]) #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox,
       #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox[overflowing="true"] > .tabbrowser-tab[pinned="true"],
       #TabsToolbar:not([multibar])
@@ -4728,12 +4779,14 @@
         .tab-content {
         max-height: var(--tab-min-height) !important; /* Force apply height */
       }
+      :root[uidensity="compact"] #TabsToolbar:not([multibar]) #pinned-tabs-container,
       :root[uidensity="compact"] #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox {
         height: var(--tab-min-height) !important;
       }
     }
   }
   /* Scroll Button - Size Fix */
+  :root #pinned-tabs-container,
   :root #tabbrowser-arrowscrollbox {
     --scrollbtn-vertical-padding: 3px;
     --scrollbtn-vertical-border: 2px;
@@ -4828,11 +4881,13 @@
 }
 @supports -moz-bool-pref("userChrome.padding.urlView_expanding") or -moz-bool-pref("userChrome.urlView.as_commandbar") {
   #urlbar[breakout][breakout-extend] {
-    top: calc((var(--urlbar-toolbar-height, var(--urlbar-container-height)) - var(--urlbar-height)) / 2) !important;
-    left: 0 !important;
-    width: 100% !important;
+    top: calc(var(--urlbar-container-height) * 2 - var(--urlbar-height)) !important;
+    width: var(--urlbar-width) !important;
+    position: relative !important;
+    margin: 0 !important;
   }
-  #urlbar[breakout][breakout-extend] > #urlbar-input-container {
+  #urlbar[breakout][breakout-extend] > #urlbar-input-container,
+  #urlbar[breakout][breakout-extend] > .urlbar-input-container {
     height: var(--urlbar-height) !important;
     padding-block: 0 !important;
     padding-inline: var(--urlbar-container-padding, 0px) !important;
@@ -7165,6 +7220,7 @@
     width: 100%;
   }
   /* Pinned */
+  #tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned][selected="true"],
   #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned][selected="true"] {
     position: relative !important;
   }
@@ -7184,18 +7240,22 @@
   }
   /* Padding */
   @supports not -moz-bool-pref("userChrome.centered.tab") {
+    #pinned-tabs-container,
     #tabbrowser-arrowscrollbox {
       margin-inline: 2px !important;
     }
+    :root[sizemode="normal"] #pinned-tabs-container,
     :root[sizemode="normal"] #tabbrowser-arrowscrollbox {
       margin-inline: 6px !important;
     }
   }
   @supports -moz-bool-pref("userChrome.centered.tab") {
     @supports -moz-bool-pref("userChrome.centered.tab.label") {
+      #pinned-tabs-container,
       #tabbrowser-arrowscrollbox {
         margin-inline: 2px !important;
       }
+      :root[sizemode="normal"] #pinned-tabs-container,
       :root[sizemode="normal"] #tabbrowser-arrowscrollbox {
         margin-inline: 6px !important;
       }
@@ -7240,6 +7300,7 @@
     }
   }
   .scrollbox-clip[orient="horizontal"],
+  #pinned-tabs-container,
   #tabbrowser-arrowscrollbox {
     overflow: -moz-hidden-unscrollable;
     display: block;
@@ -7317,6 +7378,7 @@
     > #tabs-newtab-button {
     z-index: 2 !important;
   }
+  #tabbrowser-tabs[closebuttons="activetab"][hasadjacentnewtabbutton="true"] #pinned-tabs-container,
   #tabbrowser-tabs[closebuttons="activetab"][hasadjacentnewtabbutton="true"] #tabbrowser-arrowscrollbox {
     padding-inline-end: calc(
       16px + (var(--toolbarbutton-inner-padding) + var(--toolbarbutton-outer-padding)) * 2
@@ -7334,6 +7396,16 @@
 /** Tab UI ********************************************************************/
 /*= Tab - Connect to window ==============================================*/
 @supports -moz-bool-pref("userChrome.tab.connect_to_window") {
+  #TabsToolbar #tabbrowser-tabs:not([orient="vertical"]) {
+    max-height: var(--tab-min-height);
+  }
+  #TabsToolbar #tabbrowser-tabs:not([orient="vertical"])[movingtab] {
+    padding-bottom: unset !important;
+    margin-bottom: unset !important;
+  }
+  #TabsToolbar[multibar] #tabbrowser-tabs:not([orient="vertical"]) {
+    max-height: var(--tab-min-height_mlt);
+  }
   #tabbrowser-tabs:not([orient="vertical"]) {
     min-height: unset !important; /* Original: var(--tabstrip-min-height) */
   }
@@ -7365,9 +7437,11 @@
     }
   }
   /* Pinned Tab - tabbrowser-arrowscrollbox overflowing */
+  #tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned],
   #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned] {
     z-index: 0 !important;
   }
+  #tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned] .tab-stack,
   #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned] .tab-stack {
     /* Temporary solution for compatibility #513 */
     overflow-y: clip;
@@ -7402,6 +7476,26 @@
   .tab-background:is([selected], [multiselected]) {
     background-color: var(--tab-selected-bgcolor, var(--toolbar-bgcolor)) !important;
   }
+  :root:is(:-moz-lwtheme, [lwtheme]) #pinned-tabs-container > .tabbrowser-tab > .tab-stack > .tab-background[selected],
+  :root:is(:-moz-lwtheme, [lwtheme])
+    #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
+  :root:is(:-moz-lwtheme, [lwtheme])
+    #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
+  :root:is(:-moz-lwtheme, [lwtheme])
+    #tabbrowser-tabs[orient="horizontal"]:not([movingtab])
+    > #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected],
   :root:is(:-moz-lwtheme, [lwtheme])
     #tabbrowser-arrowscrollbox
     > .tabbrowser-tab
@@ -7435,6 +7529,30 @@
     background-repeat: repeat-x, repeat-x, no-repeat !important;
   }
   @supports -moz-bool-pref("userChrome.theme.transparent.frame") {
+    :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+      #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected],
+    :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+      #tabbrowser-tabs:not([movingtab])
+      > #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected],
+    :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+      #pinned-tabs-container
+      > tab-group
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected],
+    :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
+      #tabbrowser-tabs[orient="horizontal"]:not([movingtab])
+      > #pinned-tabs-container
+      > tab-group
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected],
     :root:not([lwtheme-image]):is(:-moz-lwtheme, [lwtheme])
       #tabbrowser-arrowscrollbox
       > .tabbrowser-tab
@@ -7476,6 +7594,17 @@
   #vertical-tabs[brighttext] {
     --uc-multiselected-tab-bgcolor: color-mix(in srgb, currentColor 16%, var(--toolbar-bgcolor, transparent));
   }
+  #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
+  #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > tab-group
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
   #tabbrowser-tabs:not([movingtab])
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab
@@ -8165,12 +8294,14 @@
 /*= Unselected Tab - Divide line =============================================*/
 /*= Unselected Tab - Dynamic Separator =======================================*/
 @supports -moz-bool-pref("userChrome.tab.dynamic_separator") {
+  #pinned-tabs-container,
   #tabbrowser-arrowscrollbox {
     --start-tab-separator-position-x: -1.5px;
     --end-tab-separator-position-x: 1.5px;
     --tab-separator-position-x: -2.5px;
     --tab-separator-position-y: calc(-50% + 1px);
   }
+  #pinned-tabs-container:-moz-locale-dir(rtl),
   #tabbrowser-arrowscrollbox:-moz-locale-dir(rtl) {
     --start-tab-separator-position-x: 1.5px;
     --end-tab-separator-position-x: -1.5px;
@@ -8243,6 +8374,12 @@
       transform: translateX(var(--end-tab-separator-position-x)) translateY(var(--tab-separator-position-y)) !important;
     }
   }
+  #pinned-tabs-container:not([orient="vertical"]):not(:empty):not(
+      :has(.tabbrowser-tab[pinned]:is([visuallyselected], [multiselected], :hover):last-of-type)
+    )
+    ~ #tabbrowser-arrowscrollbox:not([orient="vertical"])
+    .tabbrowser-tab:not([visuallyselected], [multiselected], :hover):first-of-type
+    .tab-stack::before,
   #tabbrowser-tabs:not([orient="vertical"])
     .tabbrowser-tab:not([visuallyselected], [multiselected], :hover, :first-of-type)
     .tab-stack::before {
@@ -8731,6 +8868,10 @@
     --tab-label-mask-size: 25%;
   }
   .tabbrowser-tab[visuallyselected]:not([labelendaligned]):hover .tab-label-container,
+  #tabbrowser-tabs:not([closebuttons="activetab"])
+    > #pinned-tabs-container
+    > .tabbrowser-tab:not([visuallyselected], [labelendaligned]):hover
+    .tab-label-container,
   #tabbrowser-tabs:not([closebuttons="activetab"])
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab:not([visuallyselected], [labelendaligned]):hover
@@ -8740,6 +8881,12 @@
 }
 /** Clipped tabs - Show close button at hover *********************************/
 @supports -moz-bool-pref("userChrome.tab.close_button_at_hover") {
+  #tabbrowser-tabs[closebuttons="activetab"]
+    > #pinned-tabs-container
+    > .tabbrowser-tab:not([pinned])
+    > .tab-stack
+    > .tab-content
+    > .tab-close-button:not([selected]),
   #tabbrowser-tabs[closebuttons="activetab"]
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab:not([pinned])
@@ -12479,6 +12626,28 @@
     #sidebarMenu-popup > *:is(menuitem)[data-l10n-id="sidebar-menu-close"] {
       --menuitem-image: url("chrome://global/skin/icons/close.svg");
     }
+    /*= sidebar-context-menu =====================================================*/
+    #sidebar-context-menu-manage-extension {
+      --menuitem-image: url("chrome://global/skin/icons/settings.svg");
+    }
+    #sidebar-context-menu-remove-extension {
+      --menuitem-image: url("chrome://global/skin/icons/delete.svg");
+    }
+    #sidebar-context-menu-report-extension {
+      --menuitem-image: url("../icons/send.svg");
+    }
+    #sidebar-context-menu-unpin-extension {
+      --menuitem-image: url("../icons/unpin-tab.svg");
+    }
+    #sidebar-context-menu-hide-sidebar {
+      --menuitem-image: url("../icons/eye-hide.svg");
+    }
+    #sidebar-context-menu-customize-sidebar {
+      --menuitem-image: url("chrome://browser/skin/customize.svg");
+    }
+    #sidebar-context-menu-enable-vertical-tabs {
+      --menuitem-image: url("chrome://browser/skin/sidebar-collapsed.svg");
+    }
     /*= chrome://browser/content/syncedtabs/sidebar.xhtml ========================*/
     .item.client[clientType="phone"] > .item-title-container > .item-icon-container {
       background-image: url("../icons/device-phone.svg") !important;
@@ -12541,7 +12710,8 @@
         #menu_ToolsPopup,
         #windowPopup,
         #menu_HelpPopup,
-        #usercssloader-menupopup
+        #usercssloader-menupopup,
+        #sidebar-context-menu
       )
       menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
     menupopup:is(
@@ -12555,7 +12725,8 @@
         #menu_ToolsPopup,
         #windowPopup,
         #menu_HelpPopup,
-        #usercssloader-menupopup
+        #usercssloader-menupopup,
+        #sidebar-context-menu
       )
       menu:not(.menu-iconic, .in-menulist, [checked="true"]),
     menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -12629,7 +12800,8 @@
         #menu_ToolsPopup,
         #windowPopup,
         #menu_HelpPopup,
-        #usercssloader-menupopup
+        #usercssloader-menupopup,
+        #sidebar-context-menu
       )
       menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
     menupopup:is(
@@ -12643,7 +12815,8 @@
         #menu_ToolsPopup,
         #windowPopup,
         #menu_HelpPopup,
-        #usercssloader-menupopup
+        #usercssloader-menupopup,
+        #sidebar-context-menu
       )
       menu:not(.menu-iconic, .in-menulist, [checked="true"]),
     menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -12743,7 +12916,8 @@
           #menu_ToolsPopup,
           #windowPopup,
           #menu_HelpPopup,
-          #usercssloader-menupopup
+          #usercssloader-menupopup,
+          #sidebar-context-menu
         )
         menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
       menupopup:is(
@@ -12757,7 +12931,8 @@
           #menu_ToolsPopup,
           #windowPopup,
           #menu_HelpPopup,
-          #usercssloader-menupopup
+          #usercssloader-menupopup,
+          #sidebar-context-menu
         )
         menu:not(.menu-iconic, .in-menulist, [checked="true"]),
       menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -12821,7 +12996,8 @@
               #menu_ToolsPopup,
               #windowPopup,
               #menu_HelpPopup,
-              #usercssloader-menupopup
+              #usercssloader-menupopup,
+              #sidebar-context-menu
             )
             menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
           menupopup:is(
@@ -12835,7 +13011,8 @@
               #menu_ToolsPopup,
               #windowPopup,
               #menu_HelpPopup,
-              #usercssloader-menupopup
+              #usercssloader-menupopup,
+              #sidebar-context-menu
             )
             menu:not(.menu-iconic, .in-menulist, [checked="true"]),
           menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -13009,7 +13186,8 @@
           #menu_ToolsPopup,
           #windowPopup,
           #menu_HelpPopup,
-          #usercssloader-menupopup
+          #usercssloader-menupopup,
+          #sidebar-context-menu
         )
         menuitem:not(.menuitem-iconic, .bookmark-item, .in-menulist, [checked="true"]),
       menupopup:is(
@@ -13023,7 +13201,8 @@
           #menu_ToolsPopup,
           #windowPopup,
           #menu_HelpPopup,
-          #usercssloader-menupopup
+          #usercssloader-menupopup,
+          #sidebar-context-menu
         )
         menu:not(.menu-iconic, .in-menulist, [checked="true"]),
       menupopup:is(#organizeButtonPopup, #maintenanceButtonPopup)
@@ -13100,7 +13279,8 @@
             #menu_ToolsPopup,
             #windowPopup,
             #menu_HelpPopup,
-            #usercssloader-menupopup
+            #usercssloader-menupopup,
+            #sidebar-context-menu
           )
           menuitem:not(.menuitem-iconic, .bookmark-item),
         menupopup:is(
@@ -13114,7 +13294,8 @@
             #menu_ToolsPopup,
             #windowPopup,
             #menu_HelpPopup,
-            #usercssloader-menupopup
+            #usercssloader-menupopup,
+            #sidebar-context-menu
           )
           menu:not(.menu-iconic) {
           list-style-image: var(--menuitem-image, url("../icons/blank.svg")) !important;
@@ -13441,6 +13622,12 @@
       #toolbar-context-undoCloseTab {
         --menuitem-image: url("../icons/undo.svg");
       }
+      #toolbar-context-customize-sidebar {
+        --menuitem-image: url("chrome://browser/skin/customize.svg");
+      }
+      #toolbar-context-toggle-vertical-tabs {
+        --menuitem-image: url("chrome://browser/skin/sidebar-collapsed.svg");
+      }
       #toggle_toolbar-menubar {
         /* checkbox */
         --menuitem-image: url("../icons/calendar-agenda.svg");
diff --git a/src/compatibility/_os.scss b/src/compatibility/_os.scss
index 1f1fd62..089d82a 100644
--- a/src/compatibility/_os.scss
+++ b/src/compatibility/_os.scss
@@ -248,6 +248,7 @@ $_os_linuxDefaultShadow: 0 0 4px rgba(128, 128, 142, 0.5);
       -moz-default-appearance:-moz-window-titlebar !important;;
     }
 
+    :root:is([tabsintitlebar], [customtitlebar]):not(:-moz-lwtheme) #pinned-tabs-container,
     :root:is([tabsintitlebar], [customtitlebar]):not(:-moz-lwtheme) #tabbrowser-arrowscrollbox {
       color: -moz-dialogtext !important;
     }
diff --git a/src/icons/_panel.scss b/src/icons/_panel.scss
index 8c77c78..37056e6 100644
--- a/src/icons/_panel.scss
+++ b/src/icons/_panel.scss
@@ -609,6 +609,30 @@ panelMenuBookmarkThisPage[starred] {
   );
 }
 
+/*= sidebar-context-menu =====================================================*/
+#sidebar-context-menu-manage-extension {  
+  --menuitem-image: url("chrome://global/skin/icons/settings.svg");
+}
+#sidebar-context-menu-remove-extension {
+  --menuitem-image: url("chrome://global/skin/icons/delete.svg");
+}
+#sidebar-context-menu-report-extension {
+  --menuitem-image: url("../icons/send.svg");
+}
+
+#sidebar-context-menu-unpin-extension {
+  --menuitem-image: url("../icons/unpin-tab.svg");
+}
+#sidebar-context-menu-hide-sidebar {
+  --menuitem-image: url("../icons/eye-hide.svg");
+}
+#sidebar-context-menu-customize-sidebar {
+  --menuitem-image: url("chrome://browser/skin/customize.svg");
+}
+#sidebar-context-menu-enable-vertical-tabs {
+  --menuitem-image: url("chrome://browser/skin/sidebar-collapsed.svg");
+}
+
 /*= chrome://browser/content/syncedtabs/sidebar.xhtml ========================*/
 .item.client[clientType=phone] > .item-title-container > .item-icon-container {
   background-image: url("../icons/device-phone.svg") !important;
diff --git a/src/icons/context_menu/_tab_toolbar.scss b/src/icons/context_menu/_tab_toolbar.scss
index c8204ea..276bb83 100644
--- a/src/icons/context_menu/_tab_toolbar.scss
+++ b/src/icons/context_menu/_tab_toolbar.scss
@@ -218,6 +218,13 @@
   --menuitem-image: url("../icons/undo.svg");
 }
 
+#toolbar-context-customize-sidebar {
+  --menuitem-image: url("chrome://browser/skin/customize.svg");
+}
+#toolbar-context-toggle-vertical-tabs {
+  --menuitem-image: url("chrome://browser/skin/sidebar-collapsed.svg");
+}
+
 #toggle_toolbar-menubar {
   /* checkbox */
   --menuitem-image: url("../icons/calendar-agenda.svg");
diff --git a/src/icons/layout/_menu_common.scss b/src/icons/layout/_menu_common.scss
index 71c2036..68e298e 100644
--- a/src/icons/layout/_menu_common.scss
+++ b/src/icons/layout/_menu_common.scss
@@ -12,7 +12,7 @@ $_checkMenu: ":not([type=\"checkbox\"][checked=\"true\"], [type=\"radio\"])";
 $_nestedPopup: "> menupopup:not(.in-menulist) >";
 $_nestedPopupIcon: ":not(menu, #ContentSelectDropdown) #{$_nestedPopup}";
 $_nestedPopupPadding: ":not(menu, #ContentSelectDropdown, #context-navigation) #{$_nestedPopup}";
-$_iconMenuPopup: "menupopup:is(#menu_FilePopup, #menu_EditPopup, #menu_viewPopup, #goPopup, #historyMenuPopup, #bookmarksMenuPopup, #menu_ProfilesPopup, #menu_ToolsPopup, #windowPopup, #menu_HelpPopup, #usercssloader-menupopup)";
+$_iconMenuPopup: "menupopup:is(#menu_FilePopup, #menu_EditPopup, #menu_viewPopup, #goPopup, #historyMenuPopup, #bookmarksMenuPopup, #menu_ProfilesPopup, #menu_ToolsPopup, #windowPopup, #menu_HelpPopup, #usercssloader-menupopup, #sidebar-context-menu)";
 
 $_nestedPopupIconMenus: selector.nest(
   $_nestedPopupIcon,
diff --git a/src/padding/_index.scss b/src/padding/_index.scss
index 5f13bfa..32328f1 100644
--- a/src/padding/_index.scss
+++ b/src/padding/_index.scss
@@ -51,12 +51,14 @@
 }
 @include Option("userChrome.padding.urlView_expanding", "userChrome.urlView.as_commandbar") {
   #urlbar[breakout][breakout-extend] {
-    top: calc((var(--urlbar-toolbar-height, var(--urlbar-container-height)) - var(--urlbar-height)) / 2) !important;
-    left: 0 !important;
-    width: 100% !important;
+    top: calc(var(--urlbar-container-height) * 2 - var(--urlbar-height)) !important;
+    width: var(--urlbar-width) !important;
+    position: relative !important;
+    margin: 0 !important;
   }
 
-  #urlbar[breakout][breakout-extend] > #urlbar-input-container {
+  #urlbar[breakout][breakout-extend] > #urlbar-input-container,
+  #urlbar[breakout][breakout-extend] > .urlbar-input-container  {
     height: var(--urlbar-height) !important;
     padding-block: 0 !important;
     padding-inline: var(--urlbar-container-padding, 0px) !important;
diff --git a/src/padding/_tabbar_height.scss b/src/padding/_tabbar_height.scss
index 1ebf47b..adafc8b 100644
--- a/src/padding/_tabbar_height.scss
+++ b/src/padding/_tabbar_height.scss
@@ -62,12 +62,17 @@
   }
 
   @include NotOption("userChrome.tabbar.multi_row") {
+    :root:not([uidensity="compact"]) #TabsToolbar:not([multibar]) #pinned-tabs-container,
+    #TabsToolbar:not([multibar]) #pinned-tabs-container[overflowing="true"] > .tabbrowser-tab[pinned="true"],
+    #TabsToolbar:not([multibar]) #pinned-tabs-container[overflowing="true"] > .tabbrowser-tab[pinned="true"] .tab-stack,
+    #TabsToolbar:not([multibar]) #pinned-tabs-container[overflowing="true"] > .tabbrowser-tab[pinned="true"] .tab-content,
     :root:not([uidensity="compact"]) #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox,
     #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox[overflowing="true"] > .tabbrowser-tab[pinned="true"],
     #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox[overflowing="true"] > .tabbrowser-tab[pinned="true"] .tab-stack,
     #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox[overflowing="true"] > .tabbrowser-tab[pinned="true"] .tab-content {
       max-height: var(--tab-min-height) !important; /* Force apply height */
     }
+    :root[uidensity="compact"] #TabsToolbar:not([multibar]) #pinned-tabs-container,
     :root[uidensity="compact"] #TabsToolbar:not([multibar]) #tabbrowser-arrowscrollbox {
       height: var(--tab-min-height) !important;
     }
@@ -75,6 +80,7 @@
 }
 
 /* Scroll Button - Size Fix */
+:root #pinned-tabs-container,
 :root #tabbrowser-arrowscrollbox {
   --scrollbtn-vertical-padding: 3px;
   --scrollbtn-vertical-border: 2px;
diff --git a/src/padding/_tabbar_width.scss b/src/padding/_tabbar_width.scss
index 3895f75..af24fad 100644
--- a/src/padding/_tabbar_width.scss
+++ b/src/padding/_tabbar_width.scss
@@ -60,6 +60,7 @@
   }
 }
 
+:root:not([uidensity="touch"]) #pinned-tabs-container,
 :root:not([uidensity="touch"]) #tabbrowser-arrowscrollbox {
   --scrollbtn-inner-padding: 1px;
   --scrollbtn-outer-padding: 3px;
@@ -93,6 +94,9 @@
 .tabbrowser-tab[fadein]:not([pinned]):not([style*="max-width"]) {
   max-width: var(--tab-max-width) !important; /* Original: 225px */
 
+  #tabbrowser-tabs[orient="vertical"][expanded] & {
+    max-width: none !important;
+  }
   #tabbrowser-tabs[orient="horizontal"] tab-group[collapsed] > & {
     min-width: 0 !important;
     max-width: 0 !important;
@@ -104,6 +108,8 @@
 
 /* neighbouring tabs should "pinch" together */
 :root[customizing="true"] #tabbrowser-arrowscrollbox-periphery,
+#tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
+  > #pinned-tabs-container > #tabbrowser-arrowscrollbox-periphery,
 #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
   > #tabbrowser-arrowscrollbox > #tabbrowser-arrowscrollbox-periphery {
   min-width: 3px; // With Panorama Tab Groups #643 #846
diff --git a/src/tab/_connect_to_window.scss b/src/tab/_connect_to_window.scss
index 7c593f1..671912f 100644
--- a/src/tab/_connect_to_window.scss
+++ b/src/tab/_connect_to_window.scss
@@ -1,3 +1,17 @@
+#TabsToolbar {
+  #tabbrowser-tabs:not([orient="vertical"]) {
+    max-height: var(--tab-min-height);
+  }
+  #tabbrowser-tabs:not([orient="vertical"])[movingtab] {
+    padding-bottom: unset !important;
+    margin-bottom: unset !important;
+  }
+
+  &[multibar] #tabbrowser-tabs:not([orient="vertical"]) {
+    max-height: var(--tab-min-height_mlt);
+  }
+}
+
 #tabbrowser-tabs:not([orient="vertical"]) {
   min-height: unset !important; /* Original: var(--tabstrip-min-height) */
 
@@ -34,6 +48,7 @@
 }
 
 /* Pinned Tab - tabbrowser-arrowscrollbox overflowing */
+#tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned],
 #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned] {
   z-index: 0 !important;
 
diff --git a/src/tab/clipped_tab/_letters_cleary.scss b/src/tab/clipped_tab/_letters_cleary.scss
index 2151ded..d5c5bd9 100644
--- a/src/tab/clipped_tab/_letters_cleary.scss
+++ b/src/tab/clipped_tab/_letters_cleary.scss
@@ -30,6 +30,7 @@
 }
 
 .tabbrowser-tab[visuallyselected]:not([labelendaligned]):hover .tab-label-container,
+#tabbrowser-tabs:not([closebuttons=activetab]) > #pinned-tabs-container > .tabbrowser-tab:not([visuallyselected],[labelendaligned]):hover .tab-label-container,
 #tabbrowser-tabs:not([closebuttons=activetab]) > #tabbrowser-arrowscrollbox > .tabbrowser-tab:not([visuallyselected],[labelendaligned]):hover .tab-label-container {
   --tab-label-mask-size: 0.9em; /* Original: 1em */
 }
diff --git a/src/tab/clipped_tab/_show_close_button_at_hover.scss b/src/tab/clipped_tab/_show_close_button_at_hover.scss
index 8629f5e..34bda20 100644
--- a/src/tab/clipped_tab/_show_close_button_at_hover.scss
+++ b/src/tab/clipped_tab/_show_close_button_at_hover.scss
@@ -19,6 +19,11 @@
 }
 
 #tabbrowser-tabs[closebuttons="activetab"] {
+  > #pinned-tabs-container
+  > .tabbrowser-tab:not([pinned])
+  > .tab-stack
+  > .tab-content
+  > .tab-close-button:not([selected]),
   > #tabbrowser-arrowscrollbox
   > .tabbrowser-tab:not([pinned])
   > .tab-stack
diff --git a/src/tab/selected_tab/_color_like_toolbar.scss b/src/tab/selected_tab/_color_like_toolbar.scss
index 6e9f10d..75ede0c 100644
--- a/src/tab/selected_tab/_color_like_toolbar.scss
+++ b/src/tab/selected_tab/_color_like_toolbar.scss
@@ -7,6 +7,26 @@
   background-color: var(--tab-selected-bgcolor, var(--toolbar-bgcolor)) !important;
 }
 
+#pinned-tabs-container
+  > .tabbrowser-tab
+  > .tab-stack
+  > .tab-background[selected],
+#tabbrowser-tabs:not([movingtab])
+  > #pinned-tabs-container
+  > .tabbrowser-tab
+  > .tab-stack
+  > .tab-background[selected],
+#pinned-tabs-container
+  > tab-group
+  > .tabbrowser-tab
+  > .tab-stack
+  > .tab-background[selected],
+#tabbrowser-tabs[orient="horizontal"]:not([movingtab])
+  > #pinned-tabs-container
+  > tab-group
+  > .tabbrowser-tab
+  > .tab-stack
+  > .tab-background[selected],
 #tabbrowser-arrowscrollbox
   > .tabbrowser-tab
   > .tab-stack
diff --git a/src/tab/selected_tab/_multi_selected.scss b/src/tab/selected_tab/_multi_selected.scss
index 43402b8..8375d4d 100644
--- a/src/tab/selected_tab/_multi_selected.scss
+++ b/src/tab/selected_tab/_multi_selected.scss
@@ -7,6 +7,17 @@
   }
 }
 
+#tabbrowser-tabs:not([movingtab])
+  > #pinned-tabs-container
+  > .tabbrowser-tab
+  > .tab-stack
+  > .tab-background[multiselected]:not([selected]),
+#tabbrowser-tabs:not([movingtab])
+  > #pinned-tabs-container
+  > tab-group
+  > .tabbrowser-tab
+  > .tab-stack
+  > .tab-background[multiselected]:not([selected]),
 #tabbrowser-tabs:not([movingtab])
   > #tabbrowser-arrowscrollbox
   > .tabbrowser-tab
diff --git a/src/tab/unselected_tab/_dynamic_separator.scss b/src/tab/unselected_tab/_dynamic_separator.scss
index c3acfc7..1b9b392 100644
--- a/src/tab/unselected_tab/_dynamic_separator.scss
+++ b/src/tab/unselected_tab/_dynamic_separator.scss
@@ -23,6 +23,7 @@
 
 //------------------------------------------------------------------------------
 
+#pinned-tabs-container,
 #tabbrowser-arrowscrollbox {
   --start-tab-separator-position-x: -1.5px;
   --end-tab-separator-position-x: 1.5px;
@@ -69,6 +70,7 @@
   }
 }
 
+#pinned-tabs-container:not([orient="vertical"]):not(:empty):not(:has(.tabbrowser-tab[pinned]:is([visuallyselected], [multiselected], :hover):last-of-type)) ~ #tabbrowser-arrowscrollbox:not([orient="vertical"]) .tabbrowser-tab:not([visuallyselected], [multiselected], :hover):first-of-type .tab-stack::before,
 #tabbrowser-tabs:not([orient="vertical"]) .tabbrowser-tab:not([visuallyselected], [multiselected], :hover, :first-of-type) .tab-stack::before {
   opacity: var(--tab-separator-opacity);
 }
diff --git a/src/tabbar/_as_titlebar.scss b/src/tabbar/_as_titlebar.scss
index 01aa0fc..813a38a 100644
--- a/src/tabbar/_as_titlebar.scss
+++ b/src/tabbar/_as_titlebar.scss
@@ -48,6 +48,7 @@ spacer:is([part="overflow-start-indicator"], [part="overflow-end-indicator"]),
 }
 
 /* Pinned */
+#tabbrowser-tabs[positionpinnedtabs] > #pinned-tabs-container > .tabbrowser-tab[pinned][selected="true"],
 #tabbrowser-tabs[positionpinnedtabs] > #tabbrowser-arrowscrollbox > .tabbrowser-tab[pinned][selected="true"] {
   position: relative !important;
 }
@@ -70,11 +71,12 @@ spacer:is([part="overflow-start-indicator"], [part="overflow-end-indicator"]),
 
 /* Padding */
 @include _asTitlebar_preSpacer {
+  #pinned-tabs-container,
   #tabbrowser-arrowscrollbox {
     margin-inline: 2px !important;
-  }
-  :root[sizemode="normal"] #tabbrowser-arrowscrollbox {
-    margin-inline: 6px !important;
+    :root[sizemode="normal"] & {
+      margin-inline: 6px !important;
+    }
   }
 }
 
diff --git a/src/tabbar/_multi_row.scss b/src/tabbar/_multi_row.scss
index d136f51..d7864a3 100644
--- a/src/tabbar/_multi_row.scss
+++ b/src/tabbar/_multi_row.scss
@@ -40,6 +40,7 @@ See the above repository for updates as well as full license text. */
 }
 
 .scrollbox-clip[orient="horizontal"],
+#pinned-tabs-container,
 #tabbrowser-arrowscrollbox {
   overflow: -moz-hidden-unscrollable;
   display: block;
diff --git a/src/tabbar/_unscroll.scss b/src/tabbar/_unscroll.scss
index f343b0f..24018e1 100644
--- a/src/tabbar/_unscroll.scss
+++ b/src/tabbar/_unscroll.scss
@@ -46,6 +46,7 @@ spacer[part="overflow-start-indicator"] + .scrollbox-clip > scrollbox {
       }
     }
 
+    #pinned-tabs-container,
     #tabbrowser-arrowscrollbox {
       padding-inline-end: calc(16px + (var(--toolbarbutton-inner-padding) + var(--toolbarbutton-outer-padding)) * 2) !important;
     }
diff --git a/src/theme/system_default_theme/_mac.scss b/src/theme/system_default_theme/_mac.scss
index de5030c..8f34b91 100644
--- a/src/theme/system_default_theme/_mac.scss
+++ b/src/theme/system_default_theme/_mac.scss
@@ -241,6 +241,18 @@
 
   /* Hard Coded */
   @include Option("userChrome.tab.color_like_toolbar") {
+    :root[lwtheme-mozlightdark][lwt-default-theme-in-dark-mode] /* Legacy */
+      #tabbrowser-tabs:not([movingtab])
+      > #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected],
+    :root[style*="--lwt-accent-color: rgb(28, 27, 34); --lwt-text-color: rgba(251, 251, 254);"][lwt-default-theme-in-dark-mode]
+      #tabbrowser-tabs:not([movingtab])
+      > #pinned-tabs-container
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected],
     :root[lwtheme-mozlightdark][lwt-default-theme-in-dark-mode] /* Legacy */
       #tabbrowser-tabs:not([movingtab])
       > #tabbrowser-arrowscrollbox
diff --git a/src/theme/system_default_theme/_win10.scss b/src/theme/system_default_theme/_win10.scss
index f63138a..0b5f1b4 100644
--- a/src/theme/system_default_theme/_win10.scss
+++ b/src/theme/system_default_theme/_win10.scss
@@ -342,6 +342,24 @@
     }
   }
 
+  :root#{$not_lwtheme}
+  #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
+  :root[lwtheme-mozlightdark] /* Legacy */
+    #tabbrowser-tabs:not([movingtab])
+    > #pinned-tabs-container
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[multiselected]:not([selected]),
+  :root:is([style*="--lwt-accent-color: rgb(240, 240, 244); --lwt-text-color: rgba(21, 20, 26);"], [style*="--lwt-accent-color: rgb(28, 27, 34); --lwt-text-color: rgba(251, 251, 254);"])
+     #tabbrowser-tabs:not([movingtab])
+       > #pinned-tabs-container
+       > .tabbrowser-tab
+       > .tab-stack
+       > .tab-background[multiselected]:not([selected]),
   :root#{$not_lwtheme}
   #tabbrowser-tabs:not([movingtab])
     > #tabbrowser-arrowscrollbox