diff --git a/src/browser/base/content/zen-styles/zen-animations.css b/src/browser/base/content/zen-styles/zen-animations.css
index b6fe193f6..f67a1d3a7 100644
--- a/src/browser/base/content/zen-styles/zen-animations.css
+++ b/src/browser/base/content/zen-styles/zen-animations.css
@@ -56,7 +56,18 @@
 
 @keyframes zen-slide-in {
   from {
-    transform: translateX(-30px);
+    transform: translateX(-100%);
+    opacity: 0;
+  }
+  to {
+    transform: translateX(0);
+    opacity: 1;
+  }
+}
+
+@keyframes zen-slide-in-reverse {
+  from {
+    transform: translateX(100%);
     opacity: 0;
   }
   to {
@@ -228,9 +239,9 @@
     height: 0%;
   }
 
-  70% {
+  80% {
     /* make the box grow to full width/height */
-    opacity: .5;
+    opacity: 1;
     transform: translate(-50%, -50%) translateZ(0);
     top: 50%;
     left: 50%;
@@ -253,31 +264,22 @@
   0% {
     /* make the box shrink to final width/height and x/y coordinates */
     transform: translate(-50%, -50%) translateZ(0);
-    opacity: 1;
     width: 85%;
     height: 100%;
     top: 50%;
     left: 50%;
-  }
-
-  50% {
-    /* make the box grow to full width/height */
     opacity: 1;
-    transform: translate(-50%, -50%) translateZ(0);
-    top: 50%;
-    left: 50%;
-    width: 87%;
-    height: 102%;
   }
 
   100% {
     /* make the box appear from initial width/height and x/y coordinates */
+    transform: translate(-50%, -50%) translateZ(0);
     opacity: 0;
+    width: 47%;
+    height: 53%;
     top: 50%;
     left: 50%;
-    transform: translate(-50%, -50%) translateZ(0);
-    width: 0%;
-    height: 0%;
+    opacity: 0;
   }
 }
 
@@ -293,10 +295,10 @@
   to {
     width: 100%;
     height: 100%;
-    top: 0;
-    left: 0;
+    top: 50%;
+    left: 50%;
     opacity: 1;
-    transform: none;
+    transform: translate(-50%, -50%); 
   }
 }
 
diff --git a/src/browser/base/content/zen-styles/zen-browser-container.css b/src/browser/base/content/zen-styles/zen-browser-container.css
index d340d0d3e..65b154417 100644
--- a/src/browser/base/content/zen-styles/zen-browser-container.css
+++ b/src/browser/base/content/zen-styles/zen-browser-container.css
@@ -4,6 +4,9 @@
     border-radius: var(--zen-webview-border-radius, var(--zen-border-radius));
     position: relative;
 
+    /* For glance */
+    transition: transform 0.1s ease-in-out, opacity 0.1s ease-in-out;
+
     box-shadow: 0 0 1px 1px light-dark(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.5));
     overflow: hidden;
     margin: 1px;
diff --git a/src/browser/base/content/zen-styles/zen-glance.css b/src/browser/base/content/zen-styles/zen-glance.css
index 2ec5956ff..8c09c5095 100644
--- a/src/browser/base/content/zen-styles/zen-glance.css
+++ b/src/browser/base/content/zen-styles/zen-glance.css
@@ -5,7 +5,6 @@
 }
 
 .zen-glance-background {
-  transition: transform 0.1s ease-in-out, opacity 0.1s ease-in-out;
   transform: scale(0.98);
   backdrop-filter: blur(5px);
   opacity: 0.6;
@@ -28,7 +27,7 @@
 
     & .browserContainer {
       opacity: 1;
-      animation: zen-glance-content-animation-out .5s ease-in-out forwards !important;
+      animation: zen-glance-content-animation-out .3s ease-in-out forwards !important;
 
       & browser {
         opacity: 1 !important;
diff --git a/src/browser/base/content/zen-styles/zen-sidebar-panels.css b/src/browser/base/content/zen-styles/zen-sidebar-panels.css
index f67331070..cd44cfbad 100644
--- a/src/browser/base/content/zen-styles/zen-sidebar-panels.css
+++ b/src/browser/base/content/zen-styles/zen-sidebar-panels.css
@@ -277,7 +277,7 @@
 }
 
 :root:not([zen-right-side='true']) {
-  #zen-sidebar-web-panel-wrapper:not(:has(#zen-sidebar-web-panel[pinned='true'])) {
+  #zen-sidebar-web-panel-wrapper:not(:has(#zen-sidebar-web-panel:is([hidden='true'], [pinned='true']))) {
     margin-left: 0 !important;
     margin-right: calc(var(--zen-element-separation) * 2 - 3px) !important;
   }
diff --git a/src/browser/base/content/zen-styles/zen-tabs/vertical-tabs.css b/src/browser/base/content/zen-styles/zen-tabs/vertical-tabs.css
index b5018fe3d..41117a5ff 100644
--- a/src/browser/base/content/zen-styles/zen-tabs/vertical-tabs.css
+++ b/src/browser/base/content/zen-styles/zen-tabs/vertical-tabs.css
@@ -215,7 +215,21 @@
     }
 
     & .tabbrowser-tab {
-      animation: zen-slide-in 0.2s ease-in-out;
+      animation: none;
+      transition: none;
+      &[fadein='true']:not([zen-essential='true']) {
+        #tabbrowser-tabs[zen-workspace-animation='previous'] & {
+          animation: zen-slide-in-reverse 0.2s ease-in-out;
+        }
+
+        #tabbrowser-tabs[zen-workspace-animation='next'] & {
+          animation: zen-slide-in 0.2s ease-in-out;
+        }
+  
+        &[pinned] {
+          animation-delay: .03s !important;
+        }
+      }
 
       max-width: unset;
       padding: 0 !important;
diff --git a/src/browser/base/zen-components/ZenWorkspaces.mjs b/src/browser/base/zen-components/ZenWorkspaces.mjs
index 15c5272da..16afbf22d 100644
--- a/src/browser/base/zen-components/ZenWorkspaces.mjs
+++ b/src/browser/base/zen-components/ZenWorkspaces.mjs
@@ -1106,6 +1106,8 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
   }
 
   async _performWorkspaceChange(window, onInit) {
+    const previousWorkspace = await this.getActiveWorkspace();
+
     this.activeWorkspace = window.uuid;
     const containerId = window.containerTabId?.toString();
     const workspaces = await this._workspaces();
@@ -1121,6 +1123,20 @@ var ZenWorkspaces = new (class extends ZenMultiWindowFeature {
 
     // Update UI and state
     await this._updateWorkspaceState(window, onInit);
+
+    // Animate acordingly
+    if (previousWorkspace && !this._animatingChange) {
+      // we want to know if we are moving forward or backward in sense of animation
+      let isNextWorkspace = onInit || 
+        (workspaces.workspaces.findIndex((w) => w.uuid === previousWorkspace.uuid) 
+          < workspaces.workspaces.findIndex((w) => w.uuid === window.uuid));
+      gBrowser.tabContainer.setAttribute('zen-workspace-animation', isNextWorkspace ? 'next' : 'previous');
+      this._animatingChange = true;
+      setTimeout(() => {
+        this._animatingChange = false;
+        gBrowser.tabContainer.removeAttribute('zen-workspace-animation');
+      }, 300);
+    }
   }
 
 
diff --git a/src/browser/components/tabbrowser/content/tabbrowser-js.patch b/src/browser/components/tabbrowser/content/tabbrowser-js.patch
index 33fed7d35..699cafcd8 100644
--- a/src/browser/components/tabbrowser/content/tabbrowser-js.patch
+++ b/src/browser/components/tabbrowser/content/tabbrowser-js.patch
@@ -1,8 +1,8 @@
 diff --git a/browser/components/tabbrowser/content/tabbrowser.js b/browser/components/tabbrowser/content/tabbrowser.js
-index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338e14216df 100644
+index fec3dc8129a4d235fdd05e0390145a02064ebaa5..636b56754f48c1ec931152cf34bab8414a75cebc 100644
 --- a/browser/components/tabbrowser/content/tabbrowser.js
 +++ b/browser/components/tabbrowser/content/tabbrowser.js
-@@ -462,11 +462,26 @@
+@@ -402,11 +402,26 @@
        return count;
      },
  
@@ -31,7 +31,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
        }
        return i;
      },
-@@ -860,7 +875,7 @@
+@@ -800,7 +815,7 @@
        if (this.tabContainer.verticalMode) {
          let wasFocused = document.activeElement == this.selectedTab;
          let oldPosition = aTab._tPos;
@@ -40,7 +40,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
          this._updateAfterMoveTabTo(aTab, oldPosition, wasFocused);
        } else {
          this.moveTabTo(aTab, this.pinnedTabCount);
-@@ -1107,6 +1122,7 @@
+@@ -1047,6 +1062,7 @@
  
        let LOCAL_PROTOCOLS = ["chrome:", "about:", "resource:", "data:"];
  
@@ -48,7 +48,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
        if (
          aIconURL &&
          !aLoadingPrincipal &&
-@@ -1117,6 +1133,9 @@
+@@ -1057,6 +1073,9 @@
          );
          return;
        }
@@ -58,7 +58,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
  
        let browser = this.getBrowserForTab(aTab);
        browser.mIconURL = aIconURL;
-@@ -1346,6 +1365,7 @@
+@@ -1286,6 +1305,7 @@
        if (!this._previewMode) {
          newTab.recordTimeFromUnloadToReload();
          newTab.updateLastAccessed();
@@ -66,7 +66,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
          oldTab.updateLastAccessed();
          // if this is the foreground window, update the last-seen timestamps.
          if (this.ownerGlobal == BrowserWindowTracker.getTopWindow()) {
-@@ -2431,7 +2451,7 @@
+@@ -2371,7 +2391,7 @@
  
        let panel = this.getPanel(browser);
        let uniqueId = this._generateUniquePanelID();
@@ -75,7 +75,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
        aTab.linkedPanel = uniqueId;
  
        // Inject the <browser> into the DOM if necessary.
-@@ -2491,7 +2511,7 @@
+@@ -2431,7 +2451,7 @@
        // hasSiblings=false on both the existing browser and the new browser.
        if (this.tabs.length == 2) {
          this.tabs[0].linkedBrowser.browsingContext.hasSiblings = true;
@@ -84,7 +84,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
        } else {
          aTab.linkedBrowser.browsingContext.hasSiblings = this.tabs.length > 1;
        }
-@@ -2711,6 +2731,11 @@
+@@ -2651,6 +2671,11 @@
          );
        }
  
@@ -96,7 +96,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
        if (!UserInteraction.running("browser.tabs.opening", window)) {
          UserInteraction.start("browser.tabs.opening", "initting", window);
        }
-@@ -2780,6 +2805,9 @@
+@@ -2720,6 +2745,9 @@
            noInitialLabel,
            skipBackgroundNotify,
          });
@@ -106,7 +106,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
          if (insertTab) {
            // insert the tab into the tab container in the correct position
            this._insertTabAtIndex(t, {
-@@ -3291,6 +3319,23 @@
+@@ -3342,6 +3370,23 @@
          ) {
            tabWasReused = true;
            tab = this.selectedTab;
@@ -130,7 +130,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
            if (!tabData.pinned) {
              this.unpinTab(tab);
            } else {
-@@ -3304,6 +3349,9 @@
+@@ -3355,6 +3400,9 @@
              restoreTabsLazily && !select && !tabData.pinned;
  
            let url = "about:blank";
@@ -140,7 +140,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
            if (tabData.entries?.length) {
              let activeIndex = (tabData.index || tabData.entries.length) - 1;
              // Ensure the index is in bounds.
-@@ -3340,6 +3388,21 @@
+@@ -3391,6 +3439,21 @@
              preferredRemoteType,
            });
  
@@ -162,7 +162,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
            if (select) {
              tabToSelect = tab;
            }
-@@ -3374,7 +3437,6 @@
+@@ -3444,7 +3507,6 @@
              this.tabContainer._invalidateCachedTabs();
            }
          }
@@ -170,7 +170,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
          tab.initialize();
        }
  
-@@ -3831,6 +3893,10 @@
+@@ -3992,6 +4054,10 @@
          return;
        }
  
@@ -181,7 +181,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
        this.removeTabs(selectedTabs);
      },
  
-@@ -4148,6 +4214,13 @@
+@@ -4309,6 +4375,13 @@
          TelemetryStopwatch.start("FX_TAB_CLOSE_TIME_NO_ANIM_MS", aTab);
        }
  
@@ -195,7 +195,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
        // Handle requests for synchronously removing an already
        // asynchronously closing tab.
        if (!animate && aTab.closing) {
-@@ -4163,6 +4236,10 @@
+@@ -4324,6 +4397,10 @@
        // state).
        let tabWidth = window.windowUtils.getBoundsWithoutFlushing(aTab).width;
  
@@ -206,7 +206,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
        if (
          !this._beginRemoveTab(aTab, {
            closeWindowFastpath: true,
-@@ -4311,7 +4388,7 @@
+@@ -4472,7 +4549,7 @@
  
        var closeWindow = false;
        var newTab = false;
@@ -215,7 +215,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
          closeWindow =
            closeWindowWithLastTab != null
              ? closeWindowWithLastTab
-@@ -5123,10 +5200,10 @@
+@@ -5265,10 +5342,10 @@
        SessionStore.deleteCustomTabValue(aTab, "hiddenBy");
      },
  
@@ -228,7 +228,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
          aTab.selected ||
          aTab.closing ||
          // Tabs that are sharing the screen, microphone or camera cannot be hidden.
-@@ -7042,6 +7119,7 @@
+@@ -7181,6 +7258,7 @@
              aWebProgress.isTopLevel
            ) {
              this.mTab.setAttribute("busy", "true");
@@ -236,7 +236,7 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
              gBrowser._tabAttrModified(this.mTab, ["busy"]);
              this.mTab._notselectedsinceload = !this.mTab.selected;
              gBrowser.syncThrobberAnimations(this.mTab);
-@@ -7874,7 +7952,7 @@ var TabContextMenu = {
+@@ -8114,7 +8192,7 @@ var TabContextMenu = {
      );
      contextUnpinSelectedTabs.hidden =
        !this.contextTab.pinned || !multiselectionContext;
@@ -245,7 +245,16 @@ index 14de79b543cf07b04d06ef5a3f94d9aa988ea39a..439879a6b9c8cc69c569edb6318fe338
      // Move Tab items
      let contextMoveTabOptions = document.getElementById(
        "context_moveTabOptions"
-@@ -8136,6 +8214,7 @@ var TabContextMenu = {
+@@ -8148,7 +8226,7 @@ var TabContextMenu = {
+     let contextMoveTabToStart = document.getElementById("context_moveToStart");
+     let isFirstTab =
+       tabsToMove[0] == visibleTabs[0] ||
+-      tabsToMove[0] == visibleTabs[gBrowser.pinnedTabCount];
++      tabsToMove[0] == visibleTabs[gBrowser._numVisiblePinTabs];
+     contextMoveTabToStart.disabled = isFirstTab && allSelectedTabsAdjacent;
+ 
+     document.getElementById("context_openTabInWindow").disabled =
+@@ -8376,6 +8454,7 @@ var TabContextMenu = {
      if (this.contextTab.multiselected) {
        gBrowser.removeMultiSelectedTabs();
      } else {
diff --git a/src/browser/components/tabbrowser/content/tabs-js.patch b/src/browser/components/tabbrowser/content/tabs-js.patch
index 7eebd0b7b..a749c8346 100644
--- a/src/browser/components/tabbrowser/content/tabs-js.patch
+++ b/src/browser/components/tabbrowser/content/tabs-js.patch
@@ -1,7 +1,16 @@
 diff --git a/browser/components/tabbrowser/content/tabs.js b/browser/components/tabbrowser/content/tabs.js
-index f9e256b143786c18ba85859ca1b11182ab23f1aa..82368b940a6f2c526c471c0e4cc608b836cedbbd 100644
+index f9e256b143786c18ba85859ca1b11182ab23f1aa..f60a8850305f1d7c2eadb6ac6996302f42a08a8a 100644
 --- a/browser/components/tabbrowser/content/tabs.js
 +++ b/browser/components/tabbrowser/content/tabs.js
+@@ -541,7 +541,7 @@
+       if (this.#isContainerVerticalPinnedExpanded(tab)) {
+         // In expanded vertical mode, the max number of pinned tabs per row is dynamic
+         // Set this before adjusting dragged tab's position
+-        let pinnedTabs = this.visibleTabs.slice(0, gBrowser.pinnedTabCount);
++        let pinnedTabs = this.visibleTabs.slice(0, gBrowser._numVisiblePinTabs);
+         let tabsPerRow = 0;
+         let position = 0;
+         for (let pinnedTab of pinnedTabs) {
 @@ -918,7 +918,7 @@
              let postTransitionCleanup = () => {
                tab.removeAttribute("tabdrop-samewindow");
@@ -55,6 +64,15 @@ index f9e256b143786c18ba85859ca1b11182ab23f1aa..82368b940a6f2c526c471c0e4cc608b8
        selectedTab._notselectedsinceload = false;
      }
  
+@@ -1571,7 +1574,7 @@
+         if (isEndTab && !this._hasTabTempMaxWidth) {
+           return;
+         }
+-        let numPinned = gBrowser.pinnedTabCount;
++        let numPinned = gBrowser._numVisiblePinTabs;
+         // Force tabs to stay the same width, unless we're closing the last tab,
+         // which case we need to let them expand just enough so that the overall
+         // tabbar width is the same.
 @@ -1586,7 +1589,7 @@
          let tabsToReset = [];
          for (let i = numPinned; i < tabs.length; i++) {
@@ -80,6 +98,33 @@ index f9e256b143786c18ba85859ca1b11182ab23f1aa..82368b940a6f2c526c471c0e4cc608b8
          }
        }
  
+@@ -1681,7 +1684,7 @@
+ 
+     _positionPinnedTabs() {
+       let tabs = this.visibleTabs;
+-      let numPinned = gBrowser.pinnedTabCount;
++      let numPinned = gBrowser._numVisiblePinTabs;
+       let absPositionHorizontalTabs =
+         this.overflowing && tabs.length > numPinned && numPinned > 0;
+ 
+@@ -1762,7 +1765,7 @@
+         return;
+       }
+ 
+-      let tabs = this.visibleTabs.slice(0, gBrowser.pinnedTabCount);
++      let tabs = this.visibleTabs.slice(0, gBrowser._numVisiblePinTabs);
+ 
+       let directionX = screenX > dragData.animLastScreenX;
+       let directionY = screenY > dragData.animLastScreenY;
+@@ -1948,7 +1951,7 @@
+       }
+ 
+       let pinned = draggedTab.pinned;
+-      let numPinned = gBrowser.pinnedTabCount;
++      let numPinned = gBrowser._numVisiblePinTabs;
+       let tabs = this.visibleTabs.slice(
+         pinned ? 0 : numPinned,
+         pinned ? numPinned : undefined
 @@ -2140,8 +2143,8 @@
        );
      }