diff --git a/userChrome-files/bookmarks_popup.css b/userChrome-files/bookmarks_popup.css
new file mode 100644
index 0000000..fc00ede
--- /dev/null
+++ b/userChrome-files/bookmarks_popup.css
@@ -0,0 +1,82 @@
+/* Bookmarks Pop up */
+#editBMPanel_rows > row > textbox,
+#editBMPanel_rows > row > hbox > textbox,
+#editBMPanel_folderMenuList,
+#editBookmarkPanelRemoveButton,
+#editBookmarkPanelDoneButton,
+#editBMPanel_foldersExpander,
+#editBMPanel_tagsSelectorExpander {
+    background: var(--grey-70) !important;
+    color: var(--primary-light-color) !important;
+    border: 1px solid var(--grey-50) !important;
+    box-shadow: none !important;
+}
+
+.button-icon,
+#editBookmarkPanel .expander-down > .button-box > .button-icon {
+    filter: invert(65%) !important;
+}
+
+#editBMPanel_folderTree,
+#editBMPanel_tagsSelector {
+    -moz-appearance: none !important;
+    background: var(--grey-70) !important;
+    color: var(--primary-light-color) !important;
+    opacity: 1 !important;
+}
+
+
+
+
+#editBMPanel_folderTree treechildren:not(.autocomplete-treebody)::-moz-tree-row,
+#editBMPanel_tagsSelector treechildren:not(.autocomplete-treebody)::-moz-tree-row {
+    background: var(--grey-60) !important;
+    color: var(--primary-light-color) !important;
+}
+
+
+#editBMPanel_folderTree treechildren:not(.autocomplete-treebody)::-moz-tree-row(hover),
+#editBMPanel_tagsSelector treechildren:not(.autocomplete-treebody)::-moz-tree-row(hover) {
+    background: var(--dark-accent) !important;
+    color: var(--primary-accent-color) !important;
+    -moz-border-top-colors: var(--dark-accent) !important;
+    -moz-border-right-colors: var(--dark-accent) !important;
+    -moz-border-left-colors: var(--dark-accent) !important;
+    -moz-border-bottom-colors: var(--dark-accent) !important;
+}
+
+/* Change the outline of icons to light instead of dark */
+#editBMPanel_folderTree treechildren::-moz-tree-image{
+  fill: var(--primary-light-color) !important;
+}
+#editBMPanel_folderTree treechildren::-moz-tree-image(selected) {
+  fill: white !important;
+}
+
+
+/* Selected, in focus */
+#editBMPanel_folderTree treechildren:not(.autocomplete-treebody)::-moz-tree-row(selected, current, focus){
+  background: var(--primary-accent-color) !important;
+}
+
+listitem[selected="true"] {
+    background-color: var(--primary-accent-color) !important;
+    color: white !important;
+}
+
+#editBMPanel_folderTree treechildren:not(.autocomplete-treebody)::-moz-tree-row(selected, current) {
+  background: var(--blue-40) !important;
+}
+
+#editBMPanel_folderTree {
+    border: 1px solid var(--grey-50) !important;
+    border-bottom: none !important;
+}
+
+
+
+#editBMPanel_newFolderBox {
+    background: var(--grey-70) !important;
+    border: 1px solid var(--grey-50) !important;
+    box-shadow: none !important;
+}
diff --git a/userChrome.css b/userChrome.css
index 2a3b320..017ab88 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -81,6 +81,85 @@
     background: var(--dark-accent) !important;
   }
 }
+/* Bookmarks Pop up */
+
+#editBMPanel_rows > row > textbox,
+#editBMPanel_rows > row > hbox > textbox,
+#editBMPanel_folderMenuList,
+#editBookmarkPanelRemoveButton,
+#editBookmarkPanelDoneButton,
+#editBMPanel_foldersExpander,
+#editBMPanel_tagsSelectorExpander {
+  background: var(--grey-70) !important;
+  color: var(--primary-light-color) !important;
+  border: 1px solid var(--grey-50) !important;
+  box-shadow: none !important;
+}
+
+.button-icon,
+#editBookmarkPanel .expander-down > .button-box > .button-icon {
+  filter: invert(65%) !important;
+}
+
+#editBMPanel_folderTree,
+#editBMPanel_tagsSelector {
+  -moz-appearance: none !important;
+  background: var(--grey-70) !important;
+  color: var(--primary-light-color) !important;
+  opacity: 1 !important;
+}
+
+#editBMPanel_folderTree treechildren:not(.autocomplete-treebody)::-moz-tree-row,
+#editBMPanel_tagsSelector treechildren:not(.autocomplete-treebody)::-moz-tree-row {
+  background: var(--grey-60) !important;
+  color: var(--primary-light-color) !important;
+}
+
+#editBMPanel_folderTree treechildren:not(.autocomplete-treebody)::-moz-tree-row(hover),
+#editBMPanel_tagsSelector treechildren:not(.autocomplete-treebody)::-moz-tree-row(hover) {
+  background: var(--dark-accent) !important;
+  color: var(--primary-accent-color) !important;
+  -moz-border-top-colors: var(--dark-accent) !important;
+  -moz-border-right-colors: var(--dark-accent) !important;
+  -moz-border-left-colors: var(--dark-accent) !important;
+  -moz-border-bottom-colors: var(--dark-accent) !important;
+}
+
+/* Change the outline of icons to light instead of dark */
+
+#editBMPanel_folderTree treechildren::-moz-tree-image {
+  fill: var(--primary-light-color) !important;
+}
+
+#editBMPanel_folderTree treechildren::-moz-tree-image(selected) {
+  fill: white !important;
+}
+
+/* Selected, in focus */
+
+#editBMPanel_folderTree treechildren:not(.autocomplete-treebody)::-moz-tree-row(selected, current, focus) {
+  background: var(--primary-accent-color) !important;
+}
+
+listitem[selected="true"] {
+  background-color: var(--primary-accent-color) !important;
+  color: white !important;
+}
+
+#editBMPanel_folderTree treechildren:not(.autocomplete-treebody)::-moz-tree-row(selected, current) {
+  background: var(--blue-40) !important;
+}
+
+#editBMPanel_folderTree {
+  border: 1px solid var(--grey-50) !important;
+  border-bottom: none !important;
+}
+
+#editBMPanel_newFolderBox {
+  background: var(--grey-70) !important;
+  border: 1px solid var(--grey-50) !important;
+  box-shadow: none !important;
+}
 /* The following code is based on that found on
 * https://www.jeffersonscher.com/gm/url-bar-tweaks.html
 * Copyright © 2017 Jefferson Scher (BSD-3-Clause License or CC-BY License) */
diff --git a/userChrome_imports.css b/userChrome_imports.css
index ee435b1..542dff9 100644
--- a/userChrome_imports.css
+++ b/userChrome_imports.css
@@ -13,3 +13,4 @@
 @import "userChrome-files/about_firefox.css";
 @import "userChrome-files/page_info.css";
 @import "userChrome-files/findbar.css";
+@import "userChrome-files/bookmarks_popup.css";