diff --git a/css/leptonChrome.css b/css/leptonChrome.css
index b7ff89ed..391ac114 100644
--- a/css/leptonChrome.css
+++ b/css/leptonChrome.css
@@ -4152,6 +4152,7 @@
     max-width: var(--tab-max-width) !important; /* Original: 225px */
   }
   /* neighbouring tabs should "pinch" together */
+  :root[customizing="true"] #tabbrowser-arrowscrollbox-periphery,
   #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
     > #tabbrowser-arrowscrollbox
     > #tabbrowser-arrowscrollbox-periphery {
@@ -17843,6 +17844,7 @@
   }
 }
 @media (-moz-bool-pref: "userChrome.padding.tabbar_width") {
+  :root[customizing="true"] #tabbrowser-arrowscrollbox-periphery,
   #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
     > #tabbrowser-arrowscrollbox
     > #tabbrowser-arrowscrollbox-periphery {
diff --git a/css/leptonChromeESR.css b/css/leptonChromeESR.css
index 88831a00..beeea572 100644
--- a/css/leptonChromeESR.css
+++ b/css/leptonChromeESR.css
@@ -4475,6 +4475,7 @@
     max-width: var(--tab-max-width) !important; /* Original: 225px */
   }
   /* neighbouring tabs should "pinch" together */
+  :root[customizing="true"] #tabbrowser-arrowscrollbox-periphery,
   #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
     > #tabbrowser-arrowscrollbox
     > #tabbrowser-arrowscrollbox-periphery {
diff --git a/src/padding/_tabbar_width.scss b/src/padding/_tabbar_width.scss
index 5573f2c6..fdc5ee1e 100644
--- a/src/padding/_tabbar_width.scss
+++ b/src/padding/_tabbar_width.scss
@@ -95,9 +95,10 @@
 }
 
 /* neighbouring tabs should "pinch" together */
+:root[customizing="true"] #tabbrowser-arrowscrollbox-periphery,
 #tabbrowser-tabs:not([hasadjacentnewtabbutton]):not([overflow="true"])
   > #tabbrowser-arrowscrollbox > #tabbrowser-arrowscrollbox-periphery {
-  min-width: 3px; // With Panorama Tab Groups #643
+  min-width: 3px; // With Panorama Tab Groups #643 #846
 }
 @include NotOption("userChrome.tab.photon_like_padding") {
   @include Option("userChrome.tab.lepton_like_padding") {