diff --git a/src/tabbar/_divde_line.scss b/src/tabbar/_divde_line.scss
new file mode 100644
index 0000000..d848137
--- /dev/null
+++ b/src/tabbar/_divde_line.scss
@@ -0,0 +1,62 @@
+#tabbrowser-arrowscrollbox {
+  position: absolute;
+}
+
+.tab-background::before,
+#tabs-newtab-button::before {
+  /* Box Model */
+  content: "";
+  display: block;
+  position: absolute;
+
+  /* Position */
+  top: 50%;
+  transform: translateX(-2.5px) translateY(calc(-50% + 1px));
+
+  /* Bar shape */
+  width: 1px;
+  height: 20px;
+
+  /* Bar Color */
+  opacity: 0;
+  background-color: var(--toolbarseparator-color);
+}
+
+.tabbrowser-tab:not([visuallyselected], [multiselected], :hover, :first-child) .tab-background::before,
+#tabs-newtab-button:not(:hover, [open])::before {
+  opacity: var(--tab-separator-opacity);
+}
+
+#navigator-toolbox:not([movingtab])
+  .tabbrowser-tab:is([visuallyselected], [multiselected], :hover)
+  + .tabbrowser-tab
+  .tab-background::before,
+#navigator-toolbox:not([movingtab])
+  .tabbrowser-tab:is([visuallyselected], [multiselected], :hover)
+  ~ .tabbrowser-tab[afterhovered]
+  .tab-background::before,
+#navigator-toolbox:not([movingtab])
+  .tabbrowser-tab[last-visible-tab]:is([visuallyselected], [multiselected], :hover)
+  ~ #tabs-newtab-button::before,
+#navigator-toolbox:not([movingtab])
+  .tabbrowser-tab[first-visible-unpinned-tab]:is([visuallyselected], [multiselected], :hover)
+  .tab-background::before,
+#navigator-toolbox:not([movingtab])
+  #tabbrowser-arrowscrollbox[overflowing]
+  tab.tabbrowser-tab[first-visible-unpinned-tab]
+  .tab-background::before {
+  opacity: 0 !important;
+}
+
+/* Animate */
+@media (prefers-reduced-motion: no-preference) {
+  .tab-background::before,
+  #tabs-newtab-button::before {
+    transition: opacity 0.2s var(--animation-easing-function); /* cubic-bezier(.07, .95, 0, 1) */
+  }
+}
+
+/* Latest Tab & New tab margin */
+#tabbrowser-arrowscrollbox:not([overflowing]) .tabbrowser-tab[last-visible-tab] {
+  margin-inline-end: 1px !important;
+}
diff --git a/src/userChrome.scss b/src/userChrome.scss
index 1cdec96..e244c2a 100644
--- a/src/userChrome.scss
+++ b/src/userChrome.scss
@@ -50,68 +50,7 @@
 @import "tabbar/bottom_rounded_corner";
 
 /** Unselected Tab - Divide line **********************************************/
-#tabbrowser-arrowscrollbox {
-  position: absolute;
-}
-
-.tab-background::before,
-#tabs-newtab-button::before {
-  /* Box Model */
-  content: "";
-  display: block;
-  position: absolute;
-
-  /* Position */
-  top: 50%;
-  transform: translateX(-2.5px) translateY(calc(-50% + 1px));
-
-  /* Bar shape */
-  width: 1px;
-  height: 20px;
-
-  /* Bar Color */
-  opacity: 0;
-  background-color: var(--toolbarseparator-color);
-}
-
-.tabbrowser-tab:not([visuallyselected], [multiselected], :hover, :first-child) .tab-background::before,
-#tabs-newtab-button:not(:hover, [open])::before {
-  opacity: var(--tab-separator-opacity);
-}
-
-#navigator-toolbox:not([movingtab])
-  .tabbrowser-tab:is([visuallyselected], [multiselected], :hover)
-  + .tabbrowser-tab
-  .tab-background::before,
-#navigator-toolbox:not([movingtab])
-  .tabbrowser-tab:is([visuallyselected], [multiselected], :hover)
-  ~ .tabbrowser-tab[afterhovered]
-  .tab-background::before,
-#navigator-toolbox:not([movingtab])
-  .tabbrowser-tab[last-visible-tab]:is([visuallyselected], [multiselected], :hover)
-  ~ #tabs-newtab-button::before,
-#navigator-toolbox:not([movingtab])
-  .tabbrowser-tab[first-visible-unpinned-tab]:is([visuallyselected], [multiselected], :hover)
-  .tab-background::before,
-#navigator-toolbox:not([movingtab])
-  #tabbrowser-arrowscrollbox[overflowing]
-  tab.tabbrowser-tab[first-visible-unpinned-tab]
-  .tab-background::before {
-  opacity: 0 !important;
-}
-
-/* Animate */
-@media (prefers-reduced-motion: no-preference) {
-  .tab-background::before,
-  #tabs-newtab-button::before {
-    transition: opacity 0.2s var(--animation-easing-function); /* cubic-bezier(.07, .95, 0, 1) */
-  }
-}
-
-/* Latest Tab & New tab margin */
-#tabbrowser-arrowscrollbox:not([overflowing]) .tabbrowser-tab[last-visible-tab] {
-  margin-inline-end: 1px !important;
-}
+@import "tabbar/divide_line";
 
 /* New tab button - Looks like tab ********************************************/
 #tabs-newtab-button {