diff --git a/browser/base/content/browser.css b/browser/base/content/browser.css
index 8a2a20280954eb9db144a723f477e7afc603fda3..e3069de5c78cab1b26f602b7ae501e22687d2cad 100644
--- a/browser/base/content/browser.css
+++ b/browser/base/content/browser.css
@@ -2,6 +2,8 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+@import url("chrome://global/skin/zen-global-shared.css");
+
 @namespace html url("http://www.w3.org/1999/xhtml");
 
 :root,
@@ -1319,13 +1321,13 @@ printpreview-pagination:focus-within,
 
 
 #sidebar-box {
-  min-width: 14em;
+  min-width: 323px;
   max-width: 36em;
-  width: 18em;
+  width: 393px;
 }
 
 /* WebExtension Sidebars */
-#sidebar-box[sidebarcommand$="-sidebar-action"] > #sidebar-header > #sidebar-switcher-target > #sidebar-icon {
+#sidebar-box[sidebarcommand$="-sidebar-action"] #sidebar-header > #sidebar-switcher-target > #sidebar-icon {
   list-style-image: var(--webextension-menuitem-image, inherit);
   -moz-context-properties: fill;
   fill: currentColor;
@@ -1526,3 +1528,19 @@ toolbar[keyNav=true]:not([collapsed=true], [customizing=true]) toolbartabstop {
 /**
  * End Dialogs
  */
+
+/**
+ *
+ * ZEN OVERRIDES
+ */
+
+.content-prompt-dialog > .dialogOverlay {
+  align-content: start;
+}
+
+.dialogBox:not(.spotlightBox) {
+  border: 2px solid var(--zen-dialog-border-color);
+  border-radius: 5px;
+
+  transform: translateY(-8px);
+}