diff --git a/src/library/_contents.scss b/src/library/_contents.scss
index 1221c84..e1904d1 100644
--- a/src/library/_contents.scss
+++ b/src/library/_contents.scss
@@ -154,392 +154,7 @@
     }
 
     /*= Proton ===============================================================*/
-    :root {
-      --organizer-color: -moz-DialogText;
-      --organizer-deemphasized-color: GrayText;
-
-      --organizer-toolbar-background: -moz-Dialog;
-      --organizer-pane-background: -moz-Dialog;
-      --organizer-content-background: -moz-Dialog;
-
-      --organizer-hover-background: SelectedItem;
-      --organizer-hover-color: SelectedItemText;
-      --organizer-selected-background: SelectedItem;
-      --organizer-selected-color: SelectedItemText;
-      --organizer-outline-color: SelectedItem;
-
-      --organizer-separator-color: ThreeDDarkShadow;
-      --organizer-border-color: ThreeDShadow;
-
-      --organizer-toolbar-field-background: Field;
-      --organizer-toolbar-field-background-focused: Field;
-      --organizer-toolbar-field-border-color: ThreeDShadow;
-      --organizer-toolbar-field-focus-border-color: var(--organizer-outline-color);
-      --organizer-toolbar-field-focus-box-shadow: unset;
-      --organizer-pane-field-border-color: ThreeDShadow;
-    }
-
-    @media not all and (prefers-contrast) {
-      :root {
-        --organizer-color: var(--in-content-page-color);
-        --organizer-deemphasized-color: var(--in-content-deemphasized-text);
-
-        --organizer-toolbar-background: rgb(249, 249, 251); /* --toolbar-bgcolor */
-        --organizer-pane-background: rgb(229, 229, 235); /* --lwt-accent-color */
-        --organizer-content-background: var(--in-content-page-background);
-
-        --organizer-hover-background: var(--in-content-button-background-hover);
-        --organizer-hover-color: var(--organizer-color);
-        --organizer-selected-background: var(--in-content-button-background-active);
-        --organizer-selected-color: var(--organizer-color);
-        --organizer-outline-color: var(--in-content-primary-button-background);
-
-        --organizer-separator-color: var(--organizer-pane-field-border-color);
-        --organizer-border-color: var(--in-content-border-color);
-
-        --organizer-toolbar-field-background: rgb(240, 240, 244); /* --lwt-accent-color */
-        --organizer-toolbar-field-background-focused: Field;
-        --organizer-toolbar-field-border-color: transparent;
-        --organizer-toolbar-field-focus-border-color: color-mix(
-          in srgb,
-          var(--organizer-outline-color) 50%,
-          transparent
-        );
-        --organizer-toolbar-field-focus-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.23);
-        --organizer-pane-field-border-color: color-mix(in srgb, currentColor 41%, transparent);
-      }
-
-      @media (-moz-toolbar-prefers-color-scheme: dark), (prefers-color-scheme: dark) {
-        :root {
-          --organizer-color: rgb(251, 251, 254);
-          --organizer-deemphasized-color: rgb(191, 191, 201);
-
-          --organizer-toolbar-background: rgb(43, 42, 51);
-          --organizer-pane-background: rgb(35, 34, 43);
-          --organizer-content-background: rgb(28, 27, 34);
-
-          --organizer-hover-background: rgb(82, 82, 94);
-          --organizer-selected-background: rgb(91, 91, 102);
-          --organizer-outline-color: rgb(0, 221, 255);
-
-          --organizer-toolbar-field-background: var(--in-content-page-background);
-          --organizer-toolbar-field-background-focused: rgb(66, 65, 77);
-          scrollbar-color: rgba(249, 249, 250, 0.4) rgba(20, 20, 25, 0.3);
-        }
-      }
-    }
-
-    /*- Toolbar & Menus ------------------------------------------------------*/
-    #placesToolbar {
-      appearance: none !important;
-      background-color: var(--organizer-toolbar-background) !important;
-      color: var(--organizer-color) !important;
-      border-bottom: 1px solid var(--organizer-border-color) !important;
-      padding: 4px !important;
-      padding-inline-end: 6px !important;
-    }
-
-    #placesToolbar > toolbarbutton {
-      appearance: none !important;
-      padding: 5px !important;
-      border-radius: 4px !important;
-    }
-
-    #placesToolbar > toolbarbutton[disabled] {
-      opacity: 0.6 !important;
-    }
-
-    #placesToolbar > toolbarbutton:not([disabled]):hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-hover-color) !important;
-    }
-
-    #placesToolbar > toolbarbutton:not([disabled]):hover:active {
-      background-color: var(--organizer-selected-background) !important;
-    }
-
-    #placesToolbar > toolbarbutton > .toolbarbutton-icon,
-    #placesMenu > menu > image,
-    #placesMenu > menu > .menubar-text {
-      -moz-context-properties: fill !important;
-      fill: currentColor !important;
-    }
-
-    #placesMenu {
-      margin-inline-start: 6px !important;
-    }
-
-    #placesMenu > menu {
-      appearance: none !important;
-      color: var(--organizer-color) !important;
-      border-radius: 4px !important;
-      padding-block: 5px !important;
-      padding-inline-start: 5px !important;
-      margin-inline-end: 2px !important;
-    }
-
-    #placesMenu > menu[_moz-menuactive="true"],
-    #placesMenu > menu:hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-hover-color) !important;
-    }
-
-    #placesMenu > menu:hover:active,
-    #placesMenu > menu[open] {
-      background-color: var(--organizer-selected-background) !important;
-      color: var(--organizer-selected-color) !important;
-    }
-
-    #placesMenu > menu > .menubar-text {
-      margin-block: 0 !important; /* override menu.css */
-      padding-inline-end: 4px !important;
-    }
-
-    /*- Search Bar & Input ---------------------------------------------------*/
-    #searchFilter,
-    #detailsPane html|input {
-      appearance: none !important;
-      background-color: var(--organizer-toolbar-field-background) !important;
-      color: var(--organizer-color) !important;
-      border: 1px solid var(--organizer-toolbar-field-border-color) !important;
-      border-radius: 4px !important;
-      margin: 0 !important;
-      padding-block: 2px !important;
-      min-height: 24px !important;
-    }
-
-    #searchFilter[focused] {
-      box-shadow: var(--organizer-toolbar-field-focus-box-shadow) !important;
-      background-color: var(--organizer-toolbar-field-background-focused) !important;
-      border-color: transparent !important;
-      outline: 2px solid var(--organizer-toolbar-field-focus-border-color) !important;
-      outline-offset: -2px !important;
-    }
-
-    /*- Sidebar & Splitter ---------------------------------------------------*/
-    #placesList {
-      background-color: var(--organizer-pane-background) !important;
-    }
-
-    #placesView > splitter {
-      border: 0 !important;
-      border-inline-end: 1px solid var(--organizer-border-color) !important;
-      min-width: 0 !important;
-      width: 3px !important;
-      background-color: transparent !important;
-      margin-inline-start: -3px !important;
-      position: relative !important;
-    }
-
-    /*- Downloads Pane -------------------------------------------------------*/
-    #downloadsRichListBox {
-      color: var(--organizer-color) !important;
-      background-color: var(--organizer-content-background) !important;
-    }
-
-    #clearDownloadsButton:focus-visible {
-      outline: 2px solid var(--organizer-outline-color) !important;
-    }
-
-    richlistitem[selected="true"],
-    richlistitem:hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-color) !important;
-    }
-
-    richlistbox:where(:focus) > richlistitem[selected="true"] {
-      background-color: var(--organizer-selected-background) !important;
-    }
-
-    /*- Tree -----------------------------------------------------------------*/
-    #contentView treecol {
-      /* Use box-shadow to draw a bottom border instead of border-bottom
-         * because otherwise the items on contentView won't be perfectly
-         * aligned with the items on the sidebar. */
-      box-shadow: inset 0 -1px var(--organizer-border-color) !important;
-    }
-
-    tree {
-      background-color: var(--organizer-content-background) !important;
-      color: var(--organizer-color) !important;
-    }
-
-    treecol:not([hideheader="true"]),
-    treecolpicker {
-      appearance: none !important;
-      border: none !important;
-      background-color: var(--in-content-button-background) !important;
-      color: var(--organizer-color, inherit) !important;
-      padding: 5px 10px !important;
-    }
-
-    treecol:not([hideheader="true"], [sortable="false"]):hover,
-    treecolpicker:hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-color) !important;
-    }
-
-    treecol:not([hideheader="true"], [sortable="false"]):hover:active,
-    treecolpicker:hover:active {
-      background-color: var(--organizer-selected-background) !important;
-    }
-
-    treecol:not([hideheader="true"], :first-child),
-    treecolpicker {
-      padding-left: 10px !important;
-      border-inline-start-width: 1px !important;
-      border-inline-start-style: solid !important;
-      border-image: linear-gradient(
-          transparent 0%,
-          transparent 20%,
-          var(--organizer-border-color) 20%,
-          var(--organizer-border-color) 80%,
-          transparent 80%,
-          transparent 100%
-        )
-        1 1 !important;
-    }
-
-    treecol[sortDirection]:not([hideheader="true"]) > xul|*.treecol-sortdirection {
-      fill: currentColor !important;
-      width: 18px !important;
-      height: 18px !important;
-    }
-
-    treechildren::-moz-tree-row {
-      background-color: transparent !important;
-    }
-
-    treechildren::-moz-tree-row(hover) {
-      background-color: var(--organizer-hover-background) !important;
-    }
-
-    treechildren::-moz-tree-row(selected) {
-      background-color: var(--organizer-selected-background) !important;
-      color: var(--organizer-selected-color) !important;
-      border: 1px solid transparent !important;
-    }
-
-    treechildren::-moz-tree-image(hover),
-    treechildren::-moz-tree-twisty(hover),
-    treechildren::-moz-tree-cell-text(hover) {
-      color: var(--organizer-hover-color) !important;
-    }
-
-    treechildren::-moz-tree-image(selected),
-    treechildren::-moz-tree-twisty(selected),
-    treechildren::-moz-tree-cell-text(selected) {
-      color: var(--organizer-selected-color) !important;
-    }
-
-    treechildren::-moz-tree-separator {
-      height: 1px !important;
-      border-color: var(--organizer-separator-color) !important;
-    }
-
-    treechildren::-moz-tree-separator(hover) {
-      border-color: var(--organizer-hover-color) !important;
-    }
-
-    treechildren::-moz-tree-separator(selected) {
-      border-color: var(--organizer-selected-color) !important;
-    }
-
-    /*- Info Box -------------------------------------------------------------*/
-    #detailsPane {
-      background-color: var(--organizer-pane-background) !important;
-      color: var(--organizer-color) !important;
-      padding: 5px !important;
-      border-top: 1px solid var(--organizer-border-color) !important;
-    }
-
-    #editBookmarkPanelRows .expander-up,
-    #editBookmarkPanelRows .expander-down {
-      appearance: none !important;
-      min-width: 0 !important;
-      padding: 5px !important;
-      margin: 0 !important;
-      margin-inline-end: 4px !important;
-      border: 1px solid var(--organizer-pane-field-border-color) !important;
-      border-radius: 4px !important;
-      color: var(--organizer-color) !important;
-      background-color: var(--organizer-content-background) !important;
-      list-style-image: url("chrome://global/skin/icons/arrow-down-12.svg");
-      -moz-context-properties: fill !important;
-      fill: currentColor !important;
-    }
-
-    #editBookmarkPanelRows .expander-up:hover,
-    #editBookmarkPanelRows .expander-down:hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-hover-color) !important;
-    }
-
-    #editBookmarkPanelRows .expander-up:hover:active,
-    #editBookmarkPanelRows .expander-down:hover:active {
-      background-color: var(--organizer-selected-background) !important;
-      color: var(--organizer-selected-color) !important;
-    }
-
-    #editBookmarkPanelRows .expander-up:focus-visible,
-    #editBookmarkPanelRows .expander-down:focus-visible {
-      outline: 2px solid var(--organizer-outline-color) !important;
-      outline-offset: -1px !important;
-    }
-
-    #editBookmarkPanelRows .expander-up {
-      list-style-image: url("chrome://global/skin/icons/arrow-up-12.svg");
-    }
-
-    #editBookmarkPanelRows .expander-up > .button-box,
-    #editBookmarkPanelRows .expander-down > .button-box {
-      padding: 0 !important;
-    }
-
-    #places input {
-      border: 1px solid var(--organizer-pane-field-border-color) !important;
-      border-radius: 4px !important;
-      background-color: var(--organizer-content-background) !important;
-      color: var(--organizer-color) !important;
-      min-height: 20px !important;
-      padding-inline: 4px !important;
-    }
-
-    #places input:focus {
-      outline: 2px solid var(--organizer-outline-color) !important;
-      outline-offset: -1px !important;
-    }
-
-    #places input:not(:read-write):focus {
-      outline: none !important;
-    }
-
-    .caption-label {
-      margin-inline-start: 8px !important;
-      color: var(--organizer-deemphasized-color) !important;
-    }
-
-    #editBMPanel_tagsSelectorRow > richlistbox {
-      appearance: none !important;
-      color: var(--organizer-color) !important;
-      background-color: var(--organizer-content-background) !important;
-      border: 1px solid var(--organizer-border-color) !important;
-      border-radius: 4px !important;
-    }
-
-    #editBMPanel_tagsSelectorRow > richlistbox > richlistitem {
-      border: 1px solid transparent !important;
-    }
-
-    #editBMPanel_tagsSelectorRow > richlistbox > richlistitem:hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-hover-color) !important;
-    }
-
-    #editBMPanel_tagsSelectorRow > richlistbox > richlistitem[selected] {
-      background-color: var(--organizer-selected-background) !important;
-      color: var(--organizer-selected-color) !important;
-    }
+    @import "proton";
 
     /*- Radio Button ---------------------------------------------------------*/
     menuitem[type="radio"] {
diff --git a/src/library/_proton.scss b/src/library/_proton.scss
new file mode 100644
index 0000000..c98175e
--- /dev/null
+++ b/src/library/_proton.scss
@@ -0,0 +1,386 @@
+:root {
+  --organizer-color: -moz-DialogText;
+  --organizer-deemphasized-color: GrayText;
+
+  --organizer-toolbar-background: -moz-Dialog;
+  --organizer-pane-background: -moz-Dialog;
+  --organizer-content-background: -moz-Dialog;
+
+  --organizer-hover-background: SelectedItem;
+  --organizer-hover-color: SelectedItemText;
+  --organizer-selected-background: SelectedItem;
+  --organizer-selected-color: SelectedItemText;
+  --organizer-outline-color: SelectedItem;
+
+  --organizer-separator-color: ThreeDDarkShadow;
+  --organizer-border-color: ThreeDShadow;
+
+  --organizer-toolbar-field-background: Field;
+  --organizer-toolbar-field-background-focused: Field;
+  --organizer-toolbar-field-border-color: ThreeDShadow;
+  --organizer-toolbar-field-focus-border-color: var(--organizer-outline-color);
+  --organizer-toolbar-field-focus-box-shadow: unset;
+  --organizer-pane-field-border-color: ThreeDShadow;
+}
+
+@media not all and (prefers-contrast) {
+  :root {
+    --organizer-color: var(--in-content-page-color);
+    --organizer-deemphasized-color: var(--in-content-deemphasized-text);
+
+    --organizer-toolbar-background: rgb(249, 249, 251); /* --toolbar-bgcolor */
+    --organizer-pane-background: rgb(229, 229, 235); /* --lwt-accent-color */
+    --organizer-content-background: var(--in-content-page-background);
+
+    --organizer-hover-background: var(--in-content-button-background-hover);
+    --organizer-hover-color: var(--organizer-color);
+    --organizer-selected-background: var(--in-content-button-background-active);
+    --organizer-selected-color: var(--organizer-color);
+    --organizer-outline-color: var(--in-content-primary-button-background);
+
+    --organizer-separator-color: var(--organizer-pane-field-border-color);
+    --organizer-border-color: var(--in-content-border-color);
+
+    --organizer-toolbar-field-background: rgb(240, 240, 244); /* --lwt-accent-color */
+    --organizer-toolbar-field-background-focused: Field;
+    --organizer-toolbar-field-border-color: transparent;
+    --organizer-toolbar-field-focus-border-color: color-mix(
+      in srgb,
+      var(--organizer-outline-color) 50%,
+      transparent
+    );
+    --organizer-toolbar-field-focus-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.23);
+    --organizer-pane-field-border-color: color-mix(in srgb, currentColor 41%, transparent);
+  }
+
+  @media (-moz-toolbar-prefers-color-scheme: dark), (prefers-color-scheme: dark) {
+    :root {
+      --organizer-color: rgb(251, 251, 254);
+      --organizer-deemphasized-color: rgb(191, 191, 201);
+
+      --organizer-toolbar-background: rgb(43, 42, 51);
+      --organizer-pane-background: rgb(35, 34, 43);
+      --organizer-content-background: rgb(28, 27, 34);
+
+      --organizer-hover-background: rgb(82, 82, 94);
+      --organizer-selected-background: rgb(91, 91, 102);
+      --organizer-outline-color: rgb(0, 221, 255);
+
+      --organizer-toolbar-field-background: var(--in-content-page-background);
+      --organizer-toolbar-field-background-focused: rgb(66, 65, 77);
+      scrollbar-color: rgba(249, 249, 250, 0.4) rgba(20, 20, 25, 0.3);
+    }
+  }
+}
+
+/*- Toolbar & Menus ------------------------------------------------------*/
+#placesToolbar {
+  appearance: none !important;
+  background-color: var(--organizer-toolbar-background) !important;
+  color: var(--organizer-color) !important;
+  border-bottom: 1px solid var(--organizer-border-color) !important;
+  padding: 4px !important;
+  padding-inline-end: 6px !important;
+}
+
+#placesToolbar > toolbarbutton {
+  appearance: none !important;
+  padding: 5px !important;
+  border-radius: 4px !important;
+}
+
+#placesToolbar > toolbarbutton[disabled] {
+  opacity: 0.6 !important;
+}
+
+#placesToolbar > toolbarbutton:not([disabled]):hover {
+  background-color: var(--organizer-hover-background) !important;
+  color: var(--organizer-hover-color) !important;
+}
+
+#placesToolbar > toolbarbutton:not([disabled]):hover:active {
+  background-color: var(--organizer-selected-background) !important;
+}
+
+#placesToolbar > toolbarbutton > .toolbarbutton-icon,
+#placesMenu > menu > image,
+#placesMenu > menu > .menubar-text {
+  -moz-context-properties: fill !important;
+  fill: currentColor !important;
+}
+
+#placesMenu {
+  margin-inline-start: 6px !important;
+}
+
+#placesMenu > menu {
+  appearance: none !important;
+  color: var(--organizer-color) !important;
+  border-radius: 4px !important;
+  padding-block: 5px !important;
+  padding-inline-start: 5px !important;
+  margin-inline-end: 2px !important;
+}
+
+#placesMenu > menu[_moz-menuactive="true"],
+#placesMenu > menu:hover {
+  background-color: var(--organizer-hover-background) !important;
+  color: var(--organizer-hover-color) !important;
+}
+
+#placesMenu > menu:hover:active,
+#placesMenu > menu[open] {
+  background-color: var(--organizer-selected-background) !important;
+  color: var(--organizer-selected-color) !important;
+}
+
+#placesMenu > menu > .menubar-text {
+  margin-block: 0 !important; /* override menu.css */
+  padding-inline-end: 4px !important;
+}
+
+/*- Search Bar & Input ---------------------------------------------------*/
+#searchFilter,
+#detailsPane html|input {
+  appearance: none !important;
+  background-color: var(--organizer-toolbar-field-background) !important;
+  color: var(--organizer-color) !important;
+  border: 1px solid var(--organizer-toolbar-field-border-color) !important;
+  border-radius: 4px !important;
+  margin: 0 !important;
+  padding-block: 2px !important;
+  min-height: 24px !important;
+}
+
+#searchFilter[focused] {
+  box-shadow: var(--organizer-toolbar-field-focus-box-shadow) !important;
+  background-color: var(--organizer-toolbar-field-background-focused) !important;
+  border-color: transparent !important;
+  outline: 2px solid var(--organizer-toolbar-field-focus-border-color) !important;
+  outline-offset: -2px !important;
+}
+
+/*- Sidebar & Splitter ---------------------------------------------------*/
+#placesList {
+  background-color: var(--organizer-pane-background) !important;
+}
+
+#placesView > splitter {
+  border: 0 !important;
+  border-inline-end: 1px solid var(--organizer-border-color) !important;
+  min-width: 0 !important;
+  width: 3px !important;
+  background-color: transparent !important;
+  margin-inline-start: -3px !important;
+  position: relative !important;
+}
+
+/*- Downloads Pane -------------------------------------------------------*/
+#downloadsRichListBox {
+  color: var(--organizer-color) !important;
+  background-color: var(--organizer-content-background) !important;
+}
+
+#clearDownloadsButton:focus-visible {
+  outline: 2px solid var(--organizer-outline-color) !important;
+}
+
+richlistitem[selected="true"],
+richlistitem:hover {
+  background-color: var(--organizer-hover-background) !important;
+  color: var(--organizer-color) !important;
+}
+
+richlistbox:where(:focus) > richlistitem[selected="true"] {
+  background-color: var(--organizer-selected-background) !important;
+}
+
+/*- Tree -----------------------------------------------------------------*/
+#contentView treecol {
+  /* Use box-shadow to draw a bottom border instead of border-bottom
+     * because otherwise the items on contentView won't be perfectly
+     * aligned with the items on the sidebar. */
+  box-shadow: inset 0 -1px var(--organizer-border-color) !important;
+}
+
+tree {
+  background-color: var(--organizer-content-background) !important;
+  color: var(--organizer-color) !important;
+}
+
+treecol:not([hideheader="true"]),
+treecolpicker {
+  appearance: none !important;
+  border: none !important;
+  background-color: var(--in-content-button-background) !important;
+  color: var(--organizer-color, inherit) !important;
+  padding: 5px 10px !important;
+}
+
+treecol:not([hideheader="true"], [sortable="false"]):hover,
+treecolpicker:hover {
+  background-color: var(--organizer-hover-background) !important;
+  color: var(--organizer-color) !important;
+}
+
+treecol:not([hideheader="true"], [sortable="false"]):hover:active,
+treecolpicker:hover:active {
+  background-color: var(--organizer-selected-background) !important;
+}
+
+treecol:not([hideheader="true"], :first-child),
+treecolpicker {
+  padding-left: 10px !important;
+  border-inline-start-width: 1px !important;
+  border-inline-start-style: solid !important;
+  border-image: linear-gradient(
+      transparent 0%,
+      transparent 20%,
+      var(--organizer-border-color) 20%,
+      var(--organizer-border-color) 80%,
+      transparent 80%,
+      transparent 100%
+    )
+    1 1 !important;
+}
+
+treecol[sortDirection]:not([hideheader="true"]) > xul|*.treecol-sortdirection {
+  fill: currentColor !important;
+  width: 18px !important;
+  height: 18px !important;
+}
+
+treechildren::-moz-tree-row {
+  background-color: transparent !important;
+}
+
+treechildren::-moz-tree-row(hover) {
+  background-color: var(--organizer-hover-background) !important;
+}
+
+treechildren::-moz-tree-row(selected) {
+  background-color: var(--organizer-selected-background) !important;
+  color: var(--organizer-selected-color) !important;
+  border: 1px solid transparent !important;
+}
+
+treechildren::-moz-tree-image(hover),
+treechildren::-moz-tree-twisty(hover),
+treechildren::-moz-tree-cell-text(hover) {
+  color: var(--organizer-hover-color) !important;
+}
+
+treechildren::-moz-tree-image(selected),
+treechildren::-moz-tree-twisty(selected),
+treechildren::-moz-tree-cell-text(selected) {
+  color: var(--organizer-selected-color) !important;
+}
+
+treechildren::-moz-tree-separator {
+  height: 1px !important;
+  border-color: var(--organizer-separator-color) !important;
+}
+
+treechildren::-moz-tree-separator(hover) {
+  border-color: var(--organizer-hover-color) !important;
+}
+
+treechildren::-moz-tree-separator(selected) {
+  border-color: var(--organizer-selected-color) !important;
+}
+
+/*- Info Box -------------------------------------------------------------*/
+#detailsPane {
+  background-color: var(--organizer-pane-background) !important;
+  color: var(--organizer-color) !important;
+  padding: 5px !important;
+  border-top: 1px solid var(--organizer-border-color) !important;
+}
+
+#editBookmarkPanelRows .expander-up,
+#editBookmarkPanelRows .expander-down {
+  appearance: none !important;
+  min-width: 0 !important;
+  padding: 5px !important;
+  margin: 0 !important;
+  margin-inline-end: 4px !important;
+  border: 1px solid var(--organizer-pane-field-border-color) !important;
+  border-radius: 4px !important;
+  color: var(--organizer-color) !important;
+  background-color: var(--organizer-content-background) !important;
+  list-style-image: url("chrome://global/skin/icons/arrow-down-12.svg");
+  -moz-context-properties: fill !important;
+  fill: currentColor !important;
+}
+
+#editBookmarkPanelRows .expander-up:hover,
+#editBookmarkPanelRows .expander-down:hover {
+  background-color: var(--organizer-hover-background) !important;
+  color: var(--organizer-hover-color) !important;
+}
+
+#editBookmarkPanelRows .expander-up:hover:active,
+#editBookmarkPanelRows .expander-down:hover:active {
+  background-color: var(--organizer-selected-background) !important;
+  color: var(--organizer-selected-color) !important;
+}
+
+#editBookmarkPanelRows .expander-up:focus-visible,
+#editBookmarkPanelRows .expander-down:focus-visible {
+  outline: 2px solid var(--organizer-outline-color) !important;
+  outline-offset: -1px !important;
+}
+
+#editBookmarkPanelRows .expander-up {
+  list-style-image: url("chrome://global/skin/icons/arrow-up-12.svg");
+}
+
+#editBookmarkPanelRows .expander-up > .button-box,
+#editBookmarkPanelRows .expander-down > .button-box {
+  padding: 0 !important;
+}
+
+#places input {
+  border: 1px solid var(--organizer-pane-field-border-color) !important;
+  border-radius: 4px !important;
+  background-color: var(--organizer-content-background) !important;
+  color: var(--organizer-color) !important;
+  min-height: 20px !important;
+  padding-inline: 4px !important;
+}
+
+#places input:focus {
+  outline: 2px solid var(--organizer-outline-color) !important;
+  outline-offset: -1px !important;
+}
+
+#places input:not(:read-write):focus {
+  outline: none !important;
+}
+
+.caption-label {
+  margin-inline-start: 8px !important;
+  color: var(--organizer-deemphasized-color) !important;
+}
+
+#editBMPanel_tagsSelectorRow > richlistbox {
+  appearance: none !important;
+  color: var(--organizer-color) !important;
+  background-color: var(--organizer-content-background) !important;
+  border: 1px solid var(--organizer-border-color) !important;
+  border-radius: 4px !important;
+}
+
+#editBMPanel_tagsSelectorRow > richlistbox > richlistitem {
+  border: 1px solid transparent !important;
+}
+
+#editBMPanel_tagsSelectorRow > richlistbox > richlistitem:hover {
+  background-color: var(--organizer-hover-background) !important;
+  color: var(--organizer-hover-color) !important;
+}
+
+#editBMPanel_tagsSelectorRow > richlistbox > richlistitem[selected] {
+  background-color: var(--organizer-selected-background) !important;
+  color: var(--organizer-selected-color) !important;
+}
diff --git a/src/theme/proton_chrome/_library_popup.scss b/src/theme/proton_chrome/_library_popup.scss
index 6e91664..f7e2aa6 100644
--- a/src/theme/proton_chrome/_library_popup.scss
+++ b/src/theme/proton_chrome/_library_popup.scss
@@ -2,391 +2,6 @@
 @-moz-document url("chrome://browser/content/places/places.xhtml")
 {
   @include OS($linux) {
-    :root {
-      --organizer-color: -moz-DialogText;
-      --organizer-deemphasized-color: GrayText;
-
-      --organizer-toolbar-background: -moz-Dialog;
-      --organizer-pane-background: -moz-Dialog;
-      --organizer-content-background: -moz-Dialog;
-
-      --organizer-hover-background: SelectedItem;
-      --organizer-hover-color: SelectedItemText;
-      --organizer-selected-background: SelectedItem;
-      --organizer-selected-color: SelectedItemText;
-      --organizer-outline-color: SelectedItem;
-
-      --organizer-separator-color: ThreeDDarkShadow;
-      --organizer-border-color: ThreeDShadow;
-
-      --organizer-toolbar-field-background: Field;
-      --organizer-toolbar-field-background-focused: Field;
-      --organizer-toolbar-field-border-color: ThreeDShadow;
-      --organizer-toolbar-field-focus-border-color: var(--organizer-outline-color);
-      --organizer-toolbar-field-focus-box-shadow: unset;
-      --organizer-pane-field-border-color: ThreeDShadow;
-    }
-
-    @media not all and (prefers-contrast) {
-      :root {
-        --organizer-color: var(--in-content-page-color);
-        --organizer-deemphasized-color: var(--in-content-deemphasized-text);
-
-        --organizer-toolbar-background: rgb(249, 249, 251); /* --toolbar-bgcolor */
-        --organizer-pane-background: rgb(229, 229, 235); /* --lwt-accent-color */
-        --organizer-content-background: var(--in-content-page-background);
-
-        --organizer-hover-background: var(--in-content-button-background-hover);
-        --organizer-hover-color: var(--organizer-color);
-        --organizer-selected-background: var(--in-content-button-background-active);
-        --organizer-selected-color: var(--organizer-color);
-        --organizer-outline-color: var(--in-content-primary-button-background);
-
-        --organizer-separator-color: var(--organizer-pane-field-border-color);
-        --organizer-border-color: var(--in-content-border-color);
-
-        --organizer-toolbar-field-background: rgb(240, 240, 244); /* --lwt-accent-color */
-        --organizer-toolbar-field-background-focused: Field;
-        --organizer-toolbar-field-border-color: transparent;
-        --organizer-toolbar-field-focus-border-color: color-mix(
-          in srgb,
-          var(--organizer-outline-color) 50%,
-          transparent
-        );
-        --organizer-toolbar-field-focus-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.23);
-        --organizer-pane-field-border-color: color-mix(in srgb, currentColor 41%, transparent);
-      }
-
-      @media (-moz-toolbar-prefers-color-scheme: dark), (prefers-color-scheme: dark) {
-        :root {
-          --organizer-color: rgb(251, 251, 254);
-          --organizer-deemphasized-color: rgb(191, 191, 201);
-
-          --organizer-toolbar-background: rgb(43, 42, 51);
-          --organizer-pane-background: rgb(35, 34, 43);
-          --organizer-content-background: rgb(28, 27, 34);
-
-          --organizer-hover-background: rgb(82, 82, 94);
-          --organizer-selected-background: rgb(91, 91, 102);
-          --organizer-outline-color: rgb(0, 221, 255);
-
-          --organizer-toolbar-field-background: var(--in-content-page-background);
-          --organizer-toolbar-field-background-focused: rgb(66, 65, 77);
-          scrollbar-color: rgba(249, 249, 250, 0.4) rgba(20, 20, 25, 0.3);
-        }
-      }
-    }
-
-    /*- Toolbar & Menus ------------------------------------------------------*/
-    #placesToolbar {
-      appearance: none !important;
-      background-color: var(--organizer-toolbar-background) !important;
-      color: var(--organizer-color) !important;
-      border-bottom: 1px solid var(--organizer-border-color) !important;
-      padding: 4px !important;
-      padding-inline-end: 6px !important;
-    }
-
-    #placesToolbar > toolbarbutton {
-      appearance: none !important;
-      padding: 5px !important;
-      border-radius: 4px !important;
-    }
-
-    #placesToolbar > toolbarbutton[disabled] {
-      opacity: 0.6 !important;
-    }
-
-    #placesToolbar > toolbarbutton:not([disabled]):hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-hover-color) !important;
-    }
-
-    #placesToolbar > toolbarbutton:not([disabled]):hover:active {
-      background-color: var(--organizer-selected-background) !important;
-    }
-
-    #placesToolbar > toolbarbutton > .toolbarbutton-icon,
-    #placesMenu > menu > image,
-    #placesMenu > menu > .menubar-text {
-      -moz-context-properties: fill !important;
-      fill: currentColor !important;
-    }
-
-    #placesMenu {
-      margin-inline-start: 6px !important;
-    }
-
-    #placesMenu > menu {
-      appearance: none !important;
-      color: var(--organizer-color) !important;
-      border-radius: 4px !important;
-      padding-block: 5px !important;
-      padding-inline-start: 5px !important;
-      margin-inline-end: 2px !important;
-    }
-
-    #placesMenu > menu[_moz-menuactive="true"],
-    #placesMenu > menu:hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-hover-color) !important;
-    }
-
-    #placesMenu > menu:hover:active,
-    #placesMenu > menu[open] {
-      background-color: var(--organizer-selected-background) !important;
-      color: var(--organizer-selected-color) !important;
-    }
-
-    #placesMenu > menu > .menubar-text {
-      margin-block: 0 !important; /* override menu.css */
-      padding-inline-end: 4px !important;
-    }
-
-    /*- Search Bar & Input ---------------------------------------------------*/
-    #searchFilter,
-    #detailsPane html|input {
-      appearance: none !important;
-      background-color: var(--organizer-toolbar-field-background) !important;
-      color: var(--organizer-color) !important;
-      border: 1px solid var(--organizer-toolbar-field-border-color) !important;
-      border-radius: 4px !important;
-      margin: 0 !important;
-      padding-block: 2px !important;
-      min-height: 24px !important;
-    }
-
-    #searchFilter[focused] {
-      box-shadow: var(--organizer-toolbar-field-focus-box-shadow) !important;
-      background-color: var(--organizer-toolbar-field-background-focused) !important;
-      border-color: transparent !important;
-      outline: 2px solid var(--organizer-toolbar-field-focus-border-color) !important;
-      outline-offset: -2px !important;
-    }
-
-    /*- Sidebar & Splitter ---------------------------------------------------*/
-    #placesList {
-      background-color: var(--organizer-pane-background) !important;
-    }
-
-    #placesView > splitter {
-      border: 0 !important;
-      border-inline-end: 1px solid var(--organizer-border-color) !important;
-      min-width: 0 !important;
-      width: 3px !important;
-      background-color: transparent !important;
-      margin-inline-start: -3px !important;
-      position: relative !important;
-    }
-
-    /*- Downloads Pane -------------------------------------------------------*/
-    #downloadsRichListBox {
-      color: var(--organizer-color) !important;
-      background-color: var(--organizer-content-background) !important;
-    }
-
-    #clearDownloadsButton:focus-visible {
-      outline: 2px solid var(--organizer-outline-color) !important;
-    }
-
-    richlistitem[selected="true"],
-    richlistitem:hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-color) !important;
-    }
-
-    richlistbox:where(:focus) > richlistitem[selected="true"] {
-      background-color: var(--organizer-selected-background) !important;
-    }
-
-    /*- Tree -----------------------------------------------------------------*/
-    #contentView treecol {
-      /* Use box-shadow to draw a bottom border instead of border-bottom
-         * because otherwise the items on contentView won't be perfectly
-         * aligned with the items on the sidebar. */
-      box-shadow: inset 0 -1px var(--organizer-border-color) !important;
-    }
-
-    tree {
-      background-color: var(--organizer-content-background) !important;
-      color: var(--organizer-color) !important;
-    }
-
-    treecol:not([hideheader="true"]),
-    treecolpicker {
-      appearance: none !important;
-      border: none !important;
-      background-color: var(--in-content-button-background) !important;
-      color: var(--organizer-color, inherit) !important;
-      padding: 5px 10px !important;
-    }
-
-    treecol:not([hideheader="true"], [sortable="false"]):hover,
-    treecolpicker:hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-color) !important;
-    }
-
-    treecol:not([hideheader="true"], [sortable="false"]):hover:active,
-    treecolpicker:hover:active {
-      background-color: var(--organizer-selected-background) !important;
-    }
-
-    treecol:not([hideheader="true"], :first-child),
-    treecolpicker {
-      padding-left: 10px !important;
-      border-inline-start-width: 1px !important;
-      border-inline-start-style: solid !important;
-      border-image: linear-gradient(
-          transparent 0%,
-          transparent 20%,
-          var(--organizer-border-color) 20%,
-          var(--organizer-border-color) 80%,
-          transparent 80%,
-          transparent 100%
-        )
-        1 1 !important;
-    }
-
-    treecol[sortDirection]:not([hideheader="true"]) > xul|*.treecol-sortdirection {
-      fill: currentColor !important;
-      width: 18px !important;
-      height: 18px !important;
-    }
-
-    treechildren::-moz-tree-row {
-      background-color: transparent !important;
-    }
-
-    treechildren::-moz-tree-row(hover) {
-      background-color: var(--organizer-hover-background) !important;
-    }
-
-    treechildren::-moz-tree-row(selected) {
-      background-color: var(--organizer-selected-background) !important;
-      color: var(--organizer-selected-color) !important;
-      border: 1px solid transparent !important;
-    }
-
-    treechildren::-moz-tree-image(hover),
-    treechildren::-moz-tree-twisty(hover),
-    treechildren::-moz-tree-cell-text(hover) {
-      color: var(--organizer-hover-color) !important;
-    }
-
-    treechildren::-moz-tree-image(selected),
-    treechildren::-moz-tree-twisty(selected),
-    treechildren::-moz-tree-cell-text(selected) {
-      color: var(--organizer-selected-color) !important;
-    }
-
-    treechildren::-moz-tree-separator {
-      height: 1px !important;
-      border-color: var(--organizer-separator-color) !important;
-    }
-
-    treechildren::-moz-tree-separator(hover) {
-      border-color: var(--organizer-hover-color) !important;
-    }
-
-    treechildren::-moz-tree-separator(selected) {
-      border-color: var(--organizer-selected-color) !important;
-    }
-
-    /*- Info Box -------------------------------------------------------------*/
-    #detailsPane {
-      background-color: var(--organizer-pane-background) !important;
-      color: var(--organizer-color) !important;
-      padding: 5px !important;
-      border-top: 1px solid var(--organizer-border-color) !important;
-    }
-
-    #editBookmarkPanelRows .expander-up,
-    #editBookmarkPanelRows .expander-down {
-      appearance: none !important;
-      min-width: 0 !important;
-      padding: 5px !important;
-      margin: 0 !important;
-      margin-inline-end: 4px !important;
-      border: 1px solid var(--organizer-pane-field-border-color) !important;
-      border-radius: 4px !important;
-      color: var(--organizer-color) !important;
-      background-color: var(--organizer-content-background) !important;
-      list-style-image: url("chrome://global/skin/icons/arrow-down-12.svg");
-      -moz-context-properties: fill !important;
-      fill: currentColor !important;
-    }
-
-    #editBookmarkPanelRows .expander-up:hover,
-    #editBookmarkPanelRows .expander-down:hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-hover-color) !important;
-    }
-
-    #editBookmarkPanelRows .expander-up:hover:active,
-    #editBookmarkPanelRows .expander-down:hover:active {
-      background-color: var(--organizer-selected-background) !important;
-      color: var(--organizer-selected-color) !important;
-    }
-
-    #editBookmarkPanelRows .expander-up:focus-visible,
-    #editBookmarkPanelRows .expander-down:focus-visible {
-      outline: 2px solid var(--organizer-outline-color) !important;
-      outline-offset: -1px !important;
-    }
-
-    #editBookmarkPanelRows .expander-up {
-      list-style-image: url("chrome://global/skin/icons/arrow-up-12.svg");
-    }
-
-    #editBookmarkPanelRows .expander-up > .button-box,
-    #editBookmarkPanelRows .expander-down > .button-box {
-      padding: 0 !important;
-    }
-
-    #places input {
-      border: 1px solid var(--organizer-pane-field-border-color) !important;
-      border-radius: 4px !important;
-      background-color: var(--organizer-content-background) !important;
-      color: var(--organizer-color) !important;
-      min-height: 20px !important;
-      padding-inline: 4px !important;
-    }
-
-    #places input:focus {
-      outline: 2px solid var(--organizer-outline-color) !important;
-      outline-offset: -1px !important;
-    }
-
-    #places input:not(:read-write):focus {
-      outline: none !important;
-    }
-
-    .caption-label {
-      margin-inline-start: 8px !important;
-      color: var(--organizer-deemphasized-color) !important;
-    }
-
-    #editBMPanel_tagsSelectorRow > richlistbox {
-      appearance: none !important;
-      color: var(--organizer-color) !important;
-      background-color: var(--organizer-content-background) !important;
-      border: 1px solid var(--organizer-border-color) !important;
-      border-radius: 4px !important;
-    }
-
-    #editBMPanel_tagsSelectorRow > richlistbox > richlistitem {
-      border: 1px solid transparent !important;
-    }
-
-    #editBMPanel_tagsSelectorRow > richlistbox > richlistitem:hover {
-      background-color: var(--organizer-hover-background) !important;
-      color: var(--organizer-hover-color) !important;
-    }
-
-    #editBMPanel_tagsSelectorRow > richlistbox > richlistitem[selected] {
-      background-color: var(--organizer-selected-background) !important;
-      color: var(--organizer-selected-color) !important;
-    }
+    @import "../../library/proton";
   }
 }