diff --git a/src/zen/workspaces/ZenWorkspaces.mjs b/src/zen/workspaces/ZenWorkspaces.mjs
index 86ae8795d..762059c6f 100644
--- a/src/zen/workspaces/ZenWorkspaces.mjs
+++ b/src/zen/workspaces/ZenWorkspaces.mjs
@@ -609,7 +609,7 @@ var gZenWorkspaces = new (class extends ZenMultiWindowFeature {
     element.addEventListener(
       'MozSwipeGestureEnd',
       (event) => {
-        this.activeScrollbox.removeAttribute('swipe-gesture');
+        document.documentElement.removeAttribute('swipe-gesture');
         gZenUIManager.tabsWrapper.style.removeProperty('scrollbar-width');
         this.updateTabsContainers();
       },
@@ -634,7 +634,7 @@ var gZenWorkspaces = new (class extends ZenMultiWindowFeature {
   _handleSwipeStart(event) {
     if (!this.workspaceEnabled) return;
 
-    this.activeScrollbox.setAttribute('swipe-gesture', 'true');
+    document.documentElement.setAttribute('swipe-gesture', 'true');
 
     event.preventDefault();
     event.stopPropagation();
diff --git a/src/zen/workspaces/zen-workspaces.css b/src/zen/workspaces/zen-workspaces.css
index c3781a1a8..01e3209bb 100644
--- a/src/zen/workspaces/zen-workspaces.css
+++ b/src/zen/workspaces/zen-workspaces.css
@@ -517,7 +517,7 @@ zen-workspace {
       overflow-y: auto;
     }
 
-    &[swipe-gesture]::part(scrollbox) {
+    :root[swipe-gesture] &::part(scrollbox) {
       scrollbar-width: none;
     }