diff --git a/lib-install.sh b/lib-install.sh
index d51b45d..0352373 100755
--- a/lib-install.sh
+++ b/lib-install.sh
@@ -582,7 +582,17 @@ install_firefox_theme() {
 
   remove_firefox_theme
   udo mkdir -p                                                                                "${TARGET_DIR}"
-  udo cp -rf "${FIREFOX_SRC_DIR}"/*                                                           "${TARGET_DIR}"
+  udo cp -rf "${FIREFOX_SRC_DIR}"/customChrome.css                                            "${TARGET_DIR}"
+
+  if [[ "${monterey}" == 'true' ]]; then
+    udo cp -rf "${FIREFOX_SRC_DIR}"/Monterey                                                  "${TARGET_DIR}"
+    udo cp -rf "${FIREFOX_SRC_DIR}"/WhiteSur/{icons,titlebuttons}                             "${TARGET_DIR}"/Monterey
+    udo cp -rf "${FIREFOX_SRC_DIR}"/userChrome-Monterey.css                                   "${TARGET_DIR}"/userChrome.css
+  else
+    udo cp -rf "${FIREFOX_SRC_DIR}"/WhiteSur                                                  "${TARGET_DIR}"
+    udo cp -rf "${FIREFOX_SRC_DIR}"/userChrome-WhiteSur.css                                   "${TARGET_DIR}"/userChrome.css
+  fi
+
   config_firefox
 }
 
diff --git a/src/other/firefox/Monterey/drag-window-headerbar-buttons.css b/src/other/firefox/Monterey/drag-window-headerbar-buttons.css
new file mode 100644
index 0000000..a0c207c
--- /dev/null
+++ b/src/other/firefox/Monterey/drag-window-headerbar-buttons.css
@@ -0,0 +1,16 @@
+/* Allow drag window from headerbar buttons */
+
+@namespace xul url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+:root[tabsintitlebar] #nav-bar *,
+:root[tabsintitlebar] #titlebar .titlebar-button,
+:root[tabsintitlebar][inFullscreen] #window-controls toolbarbutton {
+	-moz-window-dragging: drag;
+}
+
+/* Avoid window dragging from urlbar */
+:root[tabsintitlebar] #nav-bar .urlbar-input-box, 
+:root[tabsintitlebar] #nav-bar .urlbar-input-box * {
+	-moz-window-dragging: no-drag !important;
+}
+
diff --git a/src/other/firefox/Monterey/hide-single-tab.css b/src/other/firefox/Monterey/hide-single-tab.css
new file mode 100644
index 0000000..943c67b
--- /dev/null
+++ b/src/other/firefox/Monterey/hide-single-tab.css
@@ -0,0 +1,7 @@
+@namespace xul url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+#tabbrowser-tabs tab:only-of-type {
+	display: none !important;
+}
+
+/* TODO: Hidde tabbar bottom border */
diff --git a/src/other/firefox/Monterey/hide-window-buttons.css b/src/other/firefox/Monterey/hide-window-buttons.css
new file mode 100644
index 0000000..2859ceb
--- /dev/null
+++ b/src/other/firefox/Monterey/hide-window-buttons.css
@@ -0,0 +1,9 @@
+@namespace xul url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+:root[tabsintitlebar][sizemode="maximized"] #titlebar .titlebar-buttonbox-container {
+    display: none !important;
+}
+
+:root[tabsintitlebar][sizemode="maximized"] #nav-bar {
+    padding-left: 3px !important;
+}
diff --git a/src/other/firefox/Monterey/icons b/src/other/firefox/Monterey/icons
deleted file mode 120000
index 5b3f5d4..0000000
--- a/src/other/firefox/Monterey/icons
+++ /dev/null
@@ -1 +0,0 @@
-../WhiteSur/icons
\ No newline at end of file
diff --git a/src/other/firefox/Monterey/matching-autocomplete-width.css b/src/other/firefox/Monterey/matching-autocomplete-width.css
new file mode 100644
index 0000000..190a32d
--- /dev/null
+++ b/src/other/firefox/Monterey/matching-autocomplete-width.css
@@ -0,0 +1,177 @@
+@namespace xul url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+/*
+This feature is included by default for Firefox 70+
+*/
+
+/**************************************************************************************
+*********************************** FIREFOX 68 ****************************************
+**************************************************************************************/
+/* Set popover size and position */
+panel#urlbar-results { 
+	--box-width: calc(100vw - var(--item-padding-start) - var(--item-padding-end) + 8px);
+	--fixed-widths: calc((6px + 16px + 6px) + (16px + 9px) + 11px);
+	box-sizing: border-box;
+	border-radius: 9px;
+	margin-left: 0 !important;
+	margin-top: 0 !important;
+	max-width: var(--box-width) !important;
+}
+
+/* Style as regular popover */
+panel#urlbar-results {
+	background: var(--gnome-popover-background) !important;
+	border: 1px solid !important;
+	border-color: var(--gnome-popover-border-color) !important;
+	border-radius: 9px;
+	color: var(--gnome-toolbar-color) !important;
+	padding: 8px;
+}
+
+/* Results box */
+#urlbarView-results {
+	--item-padding-start: 0 !important;
+	--item-padding-end: 0 !important;
+	max-height: 35vh !important;
+	overflow-x: auto;
+	max-width: calc(var(--box-width) - 18px) !important;
+}
+
+/* Search panel  */
+.search-one-offs {
+	width: 100%;
+	--item-padding-start: 0 !important;
+	--item-padding-end: 0 !important;
+}
+.search-panel-one-offs-header, .search-panel-one-offs {
+	background: transparent !important;
+	border: 0 !important;
+}
+panel#urlbar-results.search-panel-one-offs-header {
+	border-top: 1px solid var(--gnome-popover-separator-color) !important;
+}
+
+/* Search engines buttons */
+.searchbar-engine-one-off-item:not(.dummy) {
+	--toolbarbutton-active-background: transparent !important;
+	--toolbarbutton-hover-background: transparent !important;
+}
+
+.searchbar-engine-one-off-item:not(.dummy) {
+	-moz-appearance: none !important;
+	--toolbarbutton-active-background: transparent !important;
+	--toolbarbutton-hover-background: transparent !important;
+	-moz-appearance: none !important;
+	background: var(--gnome-button-background) !important;
+	box-shadow: var(--gnome-button-box-shadow) !important;
+	border: 1px solid var(--gnome-button-border-color) !important;
+	border-left-width: 0 !important;
+	border-bottom-color: var(--gnome-button-border-accent-color) !important;
+	padding: 0 2px !important;
+	min-height: 34px !important;
+	min-width: 34px !important;
+	margin: 0 !important;
+}
+.searchbar-engine-one-off-item:hover, .searchbar-engine-one-off-item[selected] {
+	background: var(--gnome-button-hover-background) !important;
+	color: unset !important;
+}
+.searchbar-engine-one-off-item:first-child {	
+	border-radius: 5px 0 0 5px;
+	border-left-width: 1px !important;
+}
+.searchbar-engine-one-off-item.last-engine, .searchbar-engine-one-off-item:last-child {	
+	border-radius: 0 5px 5px 0;
+}
+.searchbar-engine-one-off-item.dummy {
+	display: none !important;
+}
+.searchbar-engine-one-off-item:not(.last-row) {
+	box-sizing: border-box !important;
+}
+#urlbar-anon-search-settings-compact {
+	border-left-width: 1px !important;
+	border-bottom: 1px solid var(--gnome-button-border-accent-color) !important;
+	border-radius: 5px;	
+	margin-left: 6px !important;
+}
+
+/* Convert search engines icons to symbolic */
+#urlbar-results .searchbar-engine-one-off-item:not(.search-setting-button-compact) .button-icon {
+	filter: var(--gnome-convert-icon-to-symbolic-hack-filter);
+}
+
+/**************************************************************************************
+********************************** FIREFOX 60-67 **************************************
+**************************************************************************************/
+/* TODO: Remove when FF =< 67 is deprecated */
+#PopupAutoCompleteRichResult {
+	margin-left: 0 !important;
+	margin-top: -7px;
+}
+#PopupAutoCompleteRichResult {
+  background: var(--gnome-popover-background) !important;
+	border: 1px solid !important;
+	border-color: var(--gnome-popover-border-color) !important;
+	border-radius: 9px;
+	box-shadow: var(--gnome-popover-shadow) !important; /* BUG: Not showing any shadow at all */
+	color: var(--gnome-toolbar-color) !important;
+	padding: 8px !important;
+}
+#PopupAutoCompleteRichResult .autocomplete-richlistbox {
+	--box-width: calc(100vw - var(--item-padding-start) - var(--item-padding-end) - 42px);
+	max-width: var(--box-width);
+}
+#PopupAutoCompleteRichResult .autocomplete-richlistitem {
+	padding-left: 0 !important;
+	padding-right: 5px !important;
+	border-inline-end-width: 0 !important;
+	max-width: calc(var(--box-width) - 5px);
+	display: flex;
+	align-items: center;
+}
+/* Search panel  */
+#PopupAutoCompleteRichResult .search-panel-one-offs-header, #PopupAutoCompleteRichResult .search-panel-one-offs {
+	background: transparent !important;
+	border: 0 !important;
+}
+#PopupAutoCompleteRichResult .search-panel-one-offs-header {
+	border-top: 1px solid var(--gnome-popover-separator-color) !important;
+}
+#PopupAutoCompleteRichResult .search-panel-one-offs {
+	--item-padding-start: 0 !important;
+	--item-padding-end: 0 !important;
+}
+/* Search engines buttons */
+#PopupAutoCompleteRichResult .searchbar-engine-one-off-item:not(.dummy) {
+	-moz-appearance: none !important;
+	--toolbarbutton-active-background: transparent !important;
+	--toolbarbutton-hover-background: transparent !important;
+	background: var(--gnome-button-background) !important;
+	box-shadow: var(--gnome-button-box-shadow);
+	border-width: 1px 1px 1px 0;
+	border-style: solid;
+	border-color: var(--gnome-button-border-color) !important;
+	border-bottom-color: var(--gnome-button-border-accent-color) !important;
+	padding: 0 2px !important;
+	height: 34px !important;
+	color: var(--gnome-toolbar-color) !important;
+	box-sizing: border-box !important;
+}
+#PopupAutoCompleteRichResult .searchbar-engine-one-off-item:hover, #PopupAutoCompleteRichResult .searchbar-engine-one-off-item[selected] {	
+	background: var(--gnome-button-hover-background) !important;
+	color: unset !important;
+}
+#PopupAutoCompleteRichResult .searchbar-engine-one-off-item:first-child {	
+	border-radius: 5px 0 0 5px;
+	border-left-width: 1px !important;
+}
+#PopupAutoCompleteRichResult .searchbar-engine-one-off-item.last-engine {	
+	border-radius: 0 5px 5px 0;
+}
+#PopupAutoCompleteRichResult .searchbar-engine-one-off-item.dummy {
+	display: none !important;
+}
+#PopupAutoCompleteRichResult .searchbar-engine-one-off-item:not(.last-row) {
+	box-sizing: border-box !important;
+}
diff --git a/src/other/firefox/Monterey/rounded-window-maximized.css b/src/other/firefox/Monterey/rounded-window-maximized.css
new file mode 100644
index 0000000..525714e
--- /dev/null
+++ b/src/other/firefox/Monterey/rounded-window-maximized.css
@@ -0,0 +1,6 @@
+@namespace xul url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+:root[tabsintitlebar]:not([inFullscreen])[sizemode="maximized"] #nav-bar {
+	border-radius: 16px 16px 0 0 !important;
+}
+
diff --git a/src/other/firefox/Monterey/symbolic-tab-icons.css b/src/other/firefox/Monterey/symbolic-tab-icons.css
new file mode 100644
index 0000000..4f78367
--- /dev/null
+++ b/src/other/firefox/Monterey/symbolic-tab-icons.css
@@ -0,0 +1,17 @@
+@namespace xul url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+/* Icons light/dark fix coloring hack filters */
+:root {
+	--gnome-convert-icon-to-symbolic-hack-filter: invert(100%) sepia(100%) grayscale(100%) brightness(200%) brightness(85%) invert(100%);
+}
+@media (prefers-color-scheme: dark) {
+	:root {
+		--gnome-convert-icon-to-symbolic-hack-filter: invert(100%) sepia(100%) grayscale(100%) brightness(200%) brightness(85%);
+	}
+}
+
+/* Make tab icons look kinda like symbolic icons */
+tab .tab-icon-image {
+	filter: var(--gnome-convert-icon-to-symbolic-hack-filter);
+}
+
diff --git a/src/other/firefox/Monterey/system-icons.css b/src/other/firefox/Monterey/system-icons.css
new file mode 100644
index 0000000..3f22995
--- /dev/null
+++ b/src/other/firefox/Monterey/system-icons.css
@@ -0,0 +1,203 @@
+@namespace xul url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+/* Icons light/dark fix coloring hack filters */
+:root {
+	--gnome-icons-hack-filter: none;
+	--gnome-window-icons-hack-filter: none;
+}
+@media (prefers-color-scheme: dark) {
+	:root {
+		--gnome-icons-hack-filter: invert(100%) sepia(100%) grayscale(100%) brightness(200%) brightness(200%);
+		--gnome-window-icons-hack-filter: invert(90%);
+	}
+}
+
+/* OPTIONAL: Use system theme icons instead of Adwaita icons included by theme */
+@supports -moz-bool-pref("gnomeTheme.systemIcons") {
+	/* Window buttons */
+	:root[tabsintitlebar] #titlebar .titlebar-button .toolbarbutton-icon,
+	:root[tabsintitlebar][inFullscreen] #window-controls toolbarbutton .toolbarbutton-icon {
+		filter: var(--gnome-window-icons-hack-filter) !important;
+		width: 16px;
+	}
+	:root[tabsintitlebar] #titlebar .titlebar-buttonbox .titlebar-close .toolbarbutton-icon,
+	:root[tabsintitlebar] #titlebar #titlebar-close .toolbarbutton-icon {
+		list-style-image: url("moz-icon://stock/window-close-symbolic?size=dialog") !important;
+	}
+	:root[tabsintitlebar] #titlebar .titlebar-buttonbox .titlebar-max .toolbarbutton-icon,
+	:root[tabsintitlebar] #titlebar #titlebar-max .toolbarbutton-icon {
+		list-style-image: url("moz-icon://stock/window-maximize-symbolic?size=dialog") !important;
+	}
+	:root[tabsintitlebar] #titlebar .titlebar-buttonbox .titlebar-restore .toolbarbutton-icon {
+		list-style-image: url("moz-icon://stock/window-restore-symbolic?size=dialog") !important;
+	}
+	:root[tabsintitlebar] #titlebar .titlebar-buttonbox .titlebar-min .toolbarbutton-icon,
+	:root[tabsintitlebar] #titlebar #titlebar-min .toolbarbutton-icon {
+		list-style-image: url("moz-icon://stock/window-minimize-symbolic?size=dialog") !important;
+	}
+	:root[tabsintitlebar][inFullscreen] #window-controls #restore-button .toolbarbutton-icon {
+		list-style-image: url("moz-icon://stock/view-restore-symbolic?size=dialog") !important;
+	}
+
+	/* Toolbars close button */
+	.close-icon:not(.tab-close-button) {	
+		list-style-image: url("moz-icon://stock/window-close-symbolic?size=dialog") !important;
+	}
+	.close-icon:not(.tab-close-button) image {
+		filter: var(--gnome-window-icons-hack-filter) !important;
+	}
+
+	/* Navbar icons */
+
+	/* Back button */
+	#nav-bar #back-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/go-previous-symbolic?size=dialog") !important;
+	}
+	/* Forward button */
+	#nav-bar #forward-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/go-next-symbolic?size=dialog") !important;
+	}
+	/* Menu button */
+	#PanelUI-menu-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/open-menu-symbolic?size=dialog") !important;
+	}
+	/* New tab button */
+	#new-tab-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/tab-new-symbolic?size=dialog") !important;
+	}
+	/* Home button */
+	#home-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/user-home-symbolic?size=dialog") !important;
+	}
+	/* Preferences button */
+	#preferences-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/preferences-system-symbolic?size=dialog") !important;
+	}
+	/* Fullscreen button */
+	#fullscreen-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/view-fullscreen-symbolic?size=dialog") !important;
+	}
+	/* Zoom out button */
+	#zoom-out-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/zoom-out-symbolic?size=dialog") !important;
+	}
+	/* Zoom in button */
+	#zoom-in-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/zoom-in-symbolic?size=dialog") !important;
+	}
+	/* Developer button */
+	#developer-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/applications-engineering-symbolic?size=dialog") !important;
+	}
+	/* Email link button */
+	#email-link-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/mail-unread-symbolic?size=dialog") !important;
+	}
+	/* Print button */
+	#print-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/printer-symbolic?size=dialog") !important;
+	}
+	/* Addons button */
+	#add-ons-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/application-x-addon-symbolic?size=dialog") !important;
+	}
+	/* Find button */
+	#find-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/edit-find-symbolic?size=dialog") !important;
+	}
+	/* New window button */
+	#new-window-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/window-new-symbolic?size=dialog") !important;
+	}
+	/* Bookmarks menu button */
+	#bookmarks-menu-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/starred-symbolic?size=dialog") !important;
+	}
+	/* History button */
+	#history-panelmenu .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/preferences-system-time-symbolic?size=dialog") !important;
+	}
+	/* All tabs button */
+	#alltabs-button {
+		list-style-image: url("moz-icon://stock/pan-down-symbolic?size=dialog") !important;
+	}
+	#alltabs-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+	}
+	/* Cut button */
+	#cut-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/edit-cut-symbolic?size=dialog") !important;
+	}
+	/* Copy button */
+	#copy-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/edit-copy-symbolic?size=dialog") !important;
+	}
+	/* Paste button */
+	#paste-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/edit-paste-symbolic?size=dialog") !important;
+	}
+
+	/* Navbar overflow button */
+	#nav-bar-overflow-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/pan-down-symbolic?size=dialog") !important;
+	}
+
+	/* Context back button */	
+	#context-back .menu-iconic-icon { 
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/go-previous-symbolic?size=dialog") !important;
+	}
+	/* Context forward button */	
+	#context-forward .menu-iconic-icon { 
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/go-next-symbolic?size=dialog") !important;
+	}
+
+	/* Main menu buttons icons */
+	#appMenu-zoomReduce-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/zoom-out-symbolic?size=dialog") !important;
+	}
+	#appMenu-zoomEnlarge-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/zoom-in-symbolic?size=dialog") !important;
+	}
+	#appMenu-fullscreen-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/view-fullscreen-symbolic?size=dialog") !important;
+	}
+	#appMenu-cut-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/edit-cut-symbolic?size=dialog") !important;
+	}
+	#appMenu-copy-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/edit-copy-symbolic?size=dialog") !important;
+	}
+	#appMenu-paste-button .toolbarbutton-icon {
+		filter: var(--gnome-icons-hack-filter);
+		list-style-image: url("moz-icon://stock/edit-paste-symbolic?size=dialog") !important;
+	}
+}
+
diff --git a/src/other/firefox/Monterey/titlebuttons b/src/other/firefox/Monterey/titlebuttons
deleted file mode 120000
index b41bd0e..0000000
--- a/src/other/firefox/Monterey/titlebuttons
+++ /dev/null
@@ -1 +0,0 @@
-../WhiteSur/titlebuttons
\ No newline at end of file
diff --git a/src/other/firefox/userChrome.css b/src/other/firefox/userChrome-Monterey.css
similarity index 66%
rename from src/other/firefox/userChrome.css
rename to src/other/firefox/userChrome-Monterey.css
index 1fbea6f..77721d7 100644
--- a/src/other/firefox/userChrome.css
+++ b/src/other/firefox/userChrome-Monterey.css
@@ -3,14 +3,7 @@
  * Add "/*" at the begining of "@import" line to DISABLE.
  */
 
-
-/*-------------------Choose your theme---------------------
- * Enable one of these themes and disable the other ones.
- */
-
-@import "WhiteSur/theme.css"; /**/
-/*@import "Monterey/theme.css"; /**/
-
+@import "Monterey/theme.css"; /**/
 
 /*--------------Configure your Monterey theme--------------
  * ONLY for Monterey theme
@@ -33,30 +26,30 @@
 /* Hide the tab bar when only one tab is open (GNOMISH)
  * You should move the new tab button somewhere else for this to work, because by
  * default it is on the tab bar too. */
-/*@import "WhiteSur/hide-single-tab.css"; /**/
+/*@import "Menterey/hide-single-tab.css"; /**/
 
 /* Limit the URL bar's autocompletion popup's width to the URL bar's width (GNOMISH) 
  * This feature is included by default for Firefox 70+ */
-/*@import "WhiteSur/matching-autocomplete-width.css"; /**/
+/*@import "Menterey/matching-autocomplete-width.css"; /**/
 
 /* Rounded window even when it gets maximized */
-/*@import "WhiteSur/rounded-window-maximized.css"; /**/
+/*@import "Menterey/rounded-window-maximized.css"; /**/
 
 /* Active tab high contrast */
-/*@import "WhiteSur/active-tab-contrast.css"; /**/
+/*@import "Menterey/active-tab-contrast.css"; /**/
 
 /* Use system theme icons instead of Adwaita icons included by theme [BUGGED] */
-/*@import "WhiteSur/system-icons.css"; /**/
+/*@import "Menterey/system-icons.css"; /**/
 
-/* Allow drag window from headerbar buttons (GNOMISH) [BUGGED] 
- * It can activate button action, with unpleasant behavior. */
-/*@import "WhiteSur/drag-window-headerbar-buttons.css"; /**/
+/* Allow drag window from headerbar buttons (GNOMISH) [BUGGED] */
+/* It can activate button action, with unpleasant behavior. */
+/*@import "Menterey/drag-window-headerbar-buttons.css"; /**/
 
 /* Make all tab icons look kinda like symbolic icons */
-/*@import "WhiteSur/symbolic-tab-icons.css"; /**/
+/*@import "Menterey/symbolic-tab-icons.css"; /**/
 
 /* Hide window buttons (close/min/max) in maximized windows */
-/*@import "WhiteSur/hide-window-buttons.css"; /**/
+/*@import "Menterey/hide-window-buttons.css"; /**/
 
 /* Import your custom stylesheet */
 @import "customChrome.css"; /**/
diff --git a/src/other/firefox/userChrome-WhiteSur.css b/src/other/firefox/userChrome-WhiteSur.css
new file mode 100644
index 0000000..39b9b51
--- /dev/null
+++ b/src/other/firefox/userChrome-WhiteSur.css
@@ -0,0 +1,39 @@
+/*------------------------USAGE----------------------------
+ * Remove "/*" at the begining of "@import" line to ENABLE.
+ * Add "/*" at the begining of "@import" line to DISABLE.
+ */
+
+@import "WhiteSur/theme.css"; /**/
+
+/*--------------Configure common theme features--------------*/
+
+/* Hide the tab bar when only one tab is open (GNOMISH)
+ * You should move the new tab button somewhere else for this to work, because by
+ * default it is on the tab bar too. */
+/*@import "WhiteSur/hide-single-tab.css"; /**/
+
+/* Limit the URL bar's autocompletion popup's width to the URL bar's width (GNOMISH) 
+ * This feature is included by default for Firefox 70+ */
+/*@import "WhiteSur/matching-autocomplete-width.css"; /**/
+
+/* Rounded window even when it gets maximized */
+/*@import "WhiteSur/rounded-window-maximized.css"; /**/
+
+/* Active tab high contrast */
+/*@import "WhiteSur/active-tab-contrast.css"; /**/
+
+/* Use system theme icons instead of Adwaita icons included by theme [BUGGED] */
+/*@import "WhiteSur/system-icons.css"; /**/
+
+/* Allow drag window from headerbar buttons (GNOMISH) [BUGGED] */
+/* It can activate button action, with unpleasant behavior. */
+/*@import "WhiteSur/drag-window-headerbar-buttons.css"; /**/
+
+/* Make all tab icons look kinda like symbolic icons */
+/*@import "WhiteSur/symbolic-tab-icons.css"; /**/
+
+/* Hide window buttons (close/min/max) in maximized windows */
+/*@import "WhiteSur/hide-window-buttons.css"; /**/
+
+/* Import your custom stylesheet */
+@import "customChrome.css"; /**/
diff --git a/tweaks.sh b/tweaks.sh
index 6e5577e..f4eb535 100755
--- a/tweaks.sh
+++ b/tweaks.sh
@@ -20,6 +20,7 @@ usage() {
   # You also have to check and update them regurally
   helpify_title
   helpify "-f, --firefox"      ""                                                  "Install '${THEME_NAME}' theme for Firefox and connect it to the current Firefox profiles" ""
+  helpify "-m, --monterey"     "( Run this with -f )"                              "Install 'Monterey' theme for Firefox and connect it to the current Firefox profiles" ""
   helpify "-e, --edit-firefox" ""                                                  "Edit '${THEME_NAME}' theme for Firefox settings and also connect the theme to the current Firefox profiles" ""
   helpify "-F, --flatpak"      ""                                                  "Connect '${THEME_NAME}' theme to Flatpak"                                    ""
   helpify "-s, --snap"         ""                                                  "Connect '${THEME_NAME}' theme the currently installed snap apps"             ""
@@ -64,12 +65,15 @@ while [[ $# -gt 0 ]]; do
       full_sudo "${1}"; silent_mode='true'; shift ;;
     -h|--help)
       need_help="true"; shift ;;
-    -f|--firefox|-e|--edit-firefox)
+    -f|--firefox|-e|--edit-firefox|-m|--monterey)
       case "${1}" in
         -f|--firefox)
           firefox="true" ;;
         -e|--edit-firefox)
           edit_firefox="true" ;;
+        -m|--monterey)
+          monterey="true"
+          name="Monterey" ;;
       esac
 
       if ! has_command firefox && ! has_flatpak_app org.mozilla.firefox && ! has_snap_app firefox; then