diff --git a/theme/parts/tabsbar.css b/theme/parts/tabsbar.css
index 5b567e0..ab660c1 100644
--- a/theme/parts/tabsbar.css
+++ b/theme/parts/tabsbar.css
@@ -70,6 +70,11 @@ spacer[part=overflow-start-indicator], spacer[part=overflow-end-indicator] {
 	z-index: 5 !important;
 }
 
+/* Remove spacing between pinned tabs and first tab */
+#tabbrowser-tabs[haspinnedtabs]:not([positionpinnedtabs]) > #tabbrowser-arrowscrollbox > .tabbrowser-tab:nth-child(1 of :not([pinned], [hidden])) {
+	margin-inline-start: 0 !important;
+}
+
 /* Remove hover effects on tab bar buttons */
 #TabsToolbar {
 	--toolbarbutton-active-background: transparent !important;