diff --git a/l10n b/l10n
index 9b1df3a6..ebecb32d 160000
--- a/l10n
+++ b/l10n
@@ -1 +1 @@
-Subproject commit 9b1df3a65db379b357ac864f84ad08313b3d4c94
+Subproject commit ebecb32da8929e4f14f9a20f40acb9dab401101c
diff --git a/src/browser/components/preferences/zen-settings.js b/src/browser/components/preferences/zen-settings.js
index 346b2be9..f5f6e491 100644
--- a/src/browser/components/preferences/zen-settings.js
+++ b/src/browser/components/preferences/zen-settings.js
@@ -1232,11 +1232,6 @@ Preferences.addAll([
     type: 'bool',
     default: false,
   },
-  {
-    id: 'browser.tabs.unloadOnLowMemory',
-    type: 'bool',
-    default: true,
-  },
   {
     id: 'zen.mods.auto-update',
     type: 'bool',
diff --git a/src/browser/components/preferences/zenTabsManagement.inc.xhtml b/src/browser/components/preferences/zenTabsManagement.inc.xhtml
index d5405953..5ee4a810 100644
--- a/src/browser/components/preferences/zenTabsManagement.inc.xhtml
+++ b/src/browser/components/preferences/zenTabsManagement.inc.xhtml
@@ -31,15 +31,6 @@
 <html:h1 data-l10n-id="pane-zen-tabs-unloader-title"/>
 </hbox>
 
-<groupbox id="zenTabsUnloadGroup" data-category="paneZenTabManagement" hidden="true" class="highlighting-group">
-      <label><html:h2 data-l10n-id="zen-tabs-unloader-header"/></label>
-      <description class="description-deemphasized" data-l10n-id="zen-tabs-unloader-description" />
-
-      <checkbox id="zenTabsUnloadActivate"
-            data-l10n-id="zen-tabs-unloader-enabled"
-            preference="browser.tabs.unloadOnLowMemory"/>
-</groupbox>
-
 <hbox id="zenPinnedTabsManagerCategory"
       class="subcategory"
       hidden="true"
diff --git a/src/browser/themes/shared/zen-icons/icons.css b/src/browser/themes/shared/zen-icons/icons.css
index 1aa55aa5..c89f344b 100644
--- a/src/browser/themes/shared/zen-icons/icons.css
+++ b/src/browser/themes/shared/zen-icons/icons.css
@@ -121,6 +121,10 @@
   list-style-image: url('tab.svg') !important;
 }
 
+#context-navigation > menuitem {
+  padding: 4px;
+}
+
 #history-panelmenu,
 .urlbarView-row[source='history']
   > .urlbarView-row-inner
diff --git a/src/zen/common/ZenUIManager.mjs b/src/zen/common/ZenUIManager.mjs
index 076a33e7..ccad6bed 100644
--- a/src/zen/common/ZenUIManager.mjs
+++ b/src/zen/common/ZenUIManager.mjs
@@ -1068,12 +1068,7 @@ var gZenVerticalTabsManager = {
       !gZenVerticalTabsManager._prefsSidebarExpanded
     )
       return;
-    this._tabEdited =
-      event.target.closest('.tabbrowser-tab') ||
-      event.target.closest('.zen-current-workspace-indicator-name') ||
-      gZenWorkspaces.activeWorkspaceIndicator.querySelector(
-        '.zen-current-workspace-indicator-name'
-      );
+    this._tabEdited = event.target.closest('.tabbrowser-tab');
     if (
       !this._tabEdited ||
       ((!this._tabEdited.pinned || this._tabEdited.hasAttribute('zen-essential')) && isTab)
diff --git a/src/zen/common/ZenUIMigration.mjs b/src/zen/common/ZenUIMigration.mjs
index c021c3ce..9a742861 100644
--- a/src/zen/common/ZenUIMigration.mjs
+++ b/src/zen/common/ZenUIMigration.mjs
@@ -90,6 +90,9 @@ class ZenUIMigration {
   }
 
   _migrateV4(win) {
+    if (AppConstants.platform === 'linux') {
+      return;
+    }
     Services.prefs.setBoolPref(
       'browser.tabs.unloadOnLowMemory',
       Services.prefs.getBoolPref('zen.tab-unloader.enabled', true)
diff --git a/src/zen/common/styles/zen-browser-ui.css b/src/zen/common/styles/zen-browser-ui.css
index 3972bc61..485c7efe 100644
--- a/src/zen/common/styles/zen-browser-ui.css
+++ b/src/zen/common/styles/zen-browser-ui.css
@@ -78,16 +78,6 @@
     transition: background-color var(--inactive-window-transition);
   }
 
-  @media (not (-moz-windows-mica)) and -moz-pref('zen.view.grey-out-inactive-windows') {
-    transition: color var(--inactive-window-transition);
-    :root:not([zen-welcome-stage]) &:-moz-window-inactive {
-      color: var(--toolbox-textcolor-inactive);
-      &::before {
-        background-color: var(--toolbox-bgcolor-inactive);
-      }
-    }
-  }
-
   #zen-browser-grain {
     content: '';
     width: 100%;
@@ -131,9 +121,7 @@
     z-index: 1;
   }
 
-  @media (-moz-windows-accent-color-in-titlebar) and (-moz-windows-mica) {
-    background-color: ActiveCaption;
-    color: CaptionText;
+  @media -moz-pref('zen.view.grey-out-inactive-windows') {
     transition: background-color var(--inactive-window-transition);
     &:-moz-window-inactive {
       background-color: InactiveCaption;
@@ -264,6 +252,7 @@
     opacity: 0;
     transition: opacity 0.1s ease-in-out;
     pointer-events: none;
+    transform: translateX(-50%);
   }
 
   &:hover::before {
diff --git a/src/zen/common/styles/zen-popup.css b/src/zen/common/styles/zen-popup.css
index deeadc30..72268d33 100644
--- a/src/zen/common/styles/zen-popup.css
+++ b/src/zen/common/styles/zen-popup.css
@@ -41,7 +41,7 @@ menupopup,
 panel {
   --panel-background: var(--arrowpanel-background);
   --panel-border-radius: var(--zen-native-inner-radius);
-  --menuitem-padding: 6px 5px !important;
+  --menuitem-padding: 6px !important;
 }
 
 /* split-view popup */
diff --git a/src/zen/compact-mode/ZenCompactMode.mjs b/src/zen/compact-mode/ZenCompactMode.mjs
index 03300fcb..d4eadfe2 100644
--- a/src/zen/compact-mode/ZenCompactMode.mjs
+++ b/src/zen/compact-mode/ZenCompactMode.mjs
@@ -91,10 +91,6 @@ var gZenCompactModeManager = {
       this.preference === value ||
       document.documentElement.hasAttribute('zen-compact-animating')
     ) {
-      if (typeof this._wasInCompactMode !== 'undefined') {
-        // We wont do anything with it anyway, so we remove it
-        delete this._wasInCompactMode;
-      }
       // We dont want the user to be able to spam the button
       return value;
     }
diff --git a/src/zen/split-view/ZenViewSplitter.mjs b/src/zen/split-view/ZenViewSplitter.mjs
index c6eb12d1..eb571d67 100644
--- a/src/zen/split-view/ZenViewSplitter.mjs
+++ b/src/zen/split-view/ZenViewSplitter.mjs
@@ -210,6 +210,10 @@ class ZenViewSplitter extends ZenDOMOperatedFeature {
       const node = this.getSplitNodeFromTab(tab);
       const toUpdate = this.removeNode(node);
       this.applyGridLayout(toUpdate);
+      // Select next tab if the removed tab was selected
+      if (gBrowser.selectedTab === tab) {
+        gBrowser.selectedTab = group.tabs[0];
+      }
     }
   }
 
@@ -946,8 +950,8 @@ class ZenViewSplitter extends ZenDOMOperatedFeature {
       window.gContextMenu.contentData.docLocation ||
       window.gContextMenu.target.ownerDocument.location.href;
     const currentTab = gZenGlanceManager.getTabOrGlanceParent(window.gBrowser.selectedTab);
-    const newTab = this.openAndSwitchToTab(url);
-    this.splitTabs([currentTab, newTab]);
+    const newTab = this.openAndSwitchToTab(url, { inBackground: false });
+    this.splitTabs([currentTab, newTab], 'grid', 1);
   }
 
   /**
@@ -1090,7 +1094,7 @@ class ZenViewSplitter extends ZenDOMOperatedFeature {
     };
     this._data.push(splitData);
     if (!this._sessionRestoring) {
-      window.gBrowser.selectedTab = tabs[0];
+      window.gBrowser.selectedTab = tabs[initialIndex] ?? tabs[0];
     }
 
     // Add tabs to the split view group
diff --git a/src/zen/split-view/zen-decks.css b/src/zen/split-view/zen-decks.css
index b4e805f7..b2397bc8 100644
--- a/src/zen/split-view/zen-decks.css
+++ b/src/zen/split-view/zen-decks.css
@@ -41,6 +41,10 @@
   }
 }
 
+#zen-splitview-dropzone {
+  margin-top: 0 !important;
+}
+
 #tabbrowser-tabpanels[zen-split-view='true']:not([zen-split-resizing]) > [zen-split='true'] {
   transition: inset 0.09s ease-out !important;
   & browser {
@@ -70,15 +74,8 @@
   margin-right: calc(-1 * var(--zen-split-column-gap));
 }
 
-#tabbrowser-tabpanels:has(> [zen-split='true']),
-#zen-splitview-overlay {
-  :root:not([zen-compact-mode='true']):not([customizing]) & {
-    @media -moz-pref('zen.view.compact.hide-toolbar') {
-      & {
-        margin-top: calc(var(--zen-split-column-gap) * -1);
-      }
-    }
-  }
+:root:not([customizing]) #zen-splitview-overlay {
+  margin-top: calc(var(--zen-split-column-gap) * -1);
 }
 
 #tabbrowser-tabpanels[zen-split-view] {
diff --git a/src/zen/tabs/ZenPinnedTabManager.mjs b/src/zen/tabs/ZenPinnedTabManager.mjs
index 95317885..3b4d4aee 100644
--- a/src/zen/tabs/ZenPinnedTabManager.mjs
+++ b/src/zen/tabs/ZenPinnedTabManager.mjs
@@ -634,12 +634,17 @@
       this.resetPinChangedUrl(tab);
     }
 
-    async getFaviconAsBase64(pageUrl) {
+    async getFaviconAsBase64(pageUrl, secondTry = false) {
       try {
         const faviconData = await PlacesUtils.favicons.getFaviconForPage(pageUrl);
         if (!faviconData) {
-          // empty favicon
-          return 'data:image/png;base64,';
+          if (secondTry || pageUrl.spec.startsWith('about:')) {
+            // empty favicon
+            return 'data:image/png;base64,';
+          }
+          // Try again with the domain
+          const domainUrl = pageUrl.spec.substring(0, pageUrl.spec.indexOf('/'));
+          return await this.getFaviconAsBase64(Services.io.newURI(domainUrl), true);
         }
         return faviconData.dataURI;
       } catch (ex) {
@@ -662,7 +667,7 @@
       for (let i = 0; i < tabs.length; i++) {
         let tab = tabs[i];
         const section = gZenWorkspaces.getEssentialsSection(tab);
-        if (section.children.length >= this.MAX_ESSENTIALS_TABS) {
+        if (!this.canEssentialBeAdded(tab)) {
           movedAll = false;
           continue;
         }
@@ -794,7 +799,7 @@
       document.getElementById('context_zen-add-essential').hidden =
         contextTab.getAttribute('zen-essential') ||
         !!contextTab.group ||
-        gBrowser._numZenEssentials >= this.MAX_ESSENTIALS_TABS;
+        !this.canEssentialBeAdded(contextTab);
       document.getElementById('context_zen-remove-essential').hidden =
         !contextTab.getAttribute('zen-essential');
       document.getElementById('context_unpinTab').hidden =
@@ -1007,6 +1012,16 @@
       }
     }
 
+    canEssentialBeAdded(tab) {
+      return (
+        !(
+          (tab.getAttribute('usercontextid') || 0) !=
+            gZenWorkspaces.getActiveWorkspaceFromCache().containerTabId &&
+          gZenWorkspaces.containerSpecificEssentials
+        ) && gBrowser._numZenEssentials < this.MAX_ESSENTIALS_TABS
+      );
+    }
+
     applyDragoverClass(event, draggedTab) {
       if (!this.enabled) {
         return;
@@ -1040,10 +1055,7 @@
           shouldAddDragOverElement = true;
         }
       } else if (essentialTabsTarget) {
-        if (
-          !draggedTab.hasAttribute('zen-essential') &&
-          gBrowser._numZenEssentials < this.MAX_ESSENTIALS_TABS
-        ) {
+        if (!draggedTab.hasAttribute('zen-essential') && this.canEssentialBeAdded(draggedTab)) {
           shouldAddDragOverElement = true;
           isVertical = false;
         }