Merge pull request #8261 from SO9010/Fix-#7910

src/zen/glance/ZenGlanceManager.mjs

@@ -124,6 +124,11 @@
 
     showSidebarButtons(animate = false) {
       if (this.sidebarButtons.hasAttribute('hidden') && animate) {
+        if (gZenVerticalTabsManager._prefsRightSide) {
+          this.sidebarButtons.setAttribute('right', true);
+        } else {
+          this.sidebarButtons.removeAttribute('right');
+        }
         for (const button of this.sidebarButtons.querySelectorAll('toolbarbutton')) {
           button.style.opacity = 0;
         }

src/zen/glance/zen-glance.css

@@ -18,7 +18,13 @@
 
   padding: 5px;
   gap: 12px;
-  left: 2%;
+
+  &[right='true'] {
+    right: 2%;
+  }
+  &[right='false'] {
+    left: 2%;
+  }
 
   & toolbarbutton {
     width: 32px;