Fixed compact mode not hiding sometimes and having too much trigger area

src/browser/base/content/ZenUIManager.mjs

@@ -13,17 +13,13 @@ var gZenUIManager = {
       0
     );
 
-    function throttle(f, delay) {
-      let timer = 0;
-      return function (...args) {
-        clearTimeout(timer);
-        timer = setTimeout(() => f.apply(this, args), delay);
-      };
-    }
-
-    new ResizeObserver(throttle(this.updateTabsToolbar.bind(this), this.sidebarHeightThrottle)).observe(
+    new ResizeObserver(gZenCommonActions.throttle(this.updateTabsToolbar.bind(this), this.sidebarHeightThrottle)).observe(
       document.getElementById('tabbrowser-tabs')
     );
+
+    new ResizeObserver(gZenCommonActions.throttle(gZenCompactModeManager.getAndApplySidebarWidth.bind(gZenCompactModeManager), this.sidebarHeightThrottle)).observe(
+      document.getElementById('navigator-toolbox')
+    );
   },
 
 

src/browser/base/content/zen-styles/zen-tabs/vertical-tabs.css

@@ -234,11 +234,11 @@
     transition: scale 0.07s ease;
     &[fadein='true']:not([zen-essential='true']) {
       #tabbrowser-tabs[zen-workspace-animation='previous'] & {
-        animation: zen-slide-in 0.2s ease;
+        animation: zen-slide-in 0.3s ease;
       }
 
       #tabbrowser-tabs[zen-workspace-animation='next'] & {
-        animation: zen-slide-in-reverse 0.2s ease;
+        animation: zen-slide-in-reverse 0.3s ease;
       }
     }
 

src/browser/base/zen-components/ZenCommonUtils.mjs

@@ -79,5 +79,13 @@ var gZenCommonActions = {
       );
       ConfirmationHint.show(document.getElementById("PanelUI-menu-button"), "zen-copy-current-url-confirmation");
     }
+  },
+
+  throttle(f, delay) {
+    let timer = 0;
+    return function (...args) {
+      clearTimeout(timer);
+      timer = setTimeout(() => f.apply(this, args), delay);
+    };
   }
 };