diff --git a/home-manager/firefox/firefox-profile.nix b/home-manager/firefox/firefox-profile.nix
index 03b82e5..995f7ea 100644
--- a/home-manager/firefox/firefox-profile.nix
+++ b/home-manager/firefox/firefox-profile.nix
@@ -49,8 +49,8 @@
     "sidebar.position_start" = false;
 
     # new sidebar
-    "sidebar.revamp" = if tablet then true else false;
-    "sidebar.verticalTabs" = if tablet then true else false;
+    "sidebar.revamp" = true;
+    "sidebar.verticalTabs" = true;
     "browser.tabs.hoverPreview.enabled" = false;
     "browser.tabs.hoverPreview.showThumbnails" = false;
     "browser.tabs.groups.hoverPreview.enabled" = false;
@@ -96,6 +96,9 @@
     "browser.search.openintab" = true;
     "browser.urlbar.openintab" = true;
 
+    # AI
+    "browser.ml.chat.page" = false;
+
     /* Arkenfox Begin */
 
     /* 0320: disable recommendation pane in about:addons (uses Google Analytics) ***/
@@ -173,16 +176,19 @@
     "browser.contentblocking.category" = "strict";
   };
   userChrome = ''
-    /* Hide tab bar in FF Quantum */
-    @-moz-document url(chrome://browser/content/browser.xul), url(chrome://browser/content/browser.xhtml) {
-      #TabsToolbar {
-        visibility: collapse !important;
-        margin-bottom: 21px !important;
-      }
+    /* For old sidebar */
+    #sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"] #sidebar-header {
+      display: none;
+    }
 
-      #sidebar-box[sidebarcommand="treestyletab_piro_sakura_ne_jp-sidebar-action"] #sidebar-header {
-        visibility: collapse !important;
-      }
+    /* Remove sidebar revamp */
+    #sidebar-panel-header {
+      display: none;
+    }
+
+    /* Allow complete collapse of sidebar revamp */
+    #sidebar-main:not([sidebar-launcher-expanded]) {
+      width: 0;
     }
   '';
 }