diff --git a/current/css/buttons/custom_backforward_large_ie11.css b/current/css/buttons/custom_backforward_large_ie11.css
new file mode 100644
index 00000000..157bd019
--- /dev/null
+++ b/current/css/buttons/custom_backforward_large_ie11.css
@@ -0,0 +1,26 @@
+/* Firefox userChrome.css tweaks ********************************************************/
+/* Github: https://github.com/aris-t2/customcssforfx ************************************/
+/****************************************************************************************/
+
+
+@import "./custom_backforward_large.css";
+
+/* custom large back-forward buttons */
+#main-window:not([uidensity=compact]):not([uidensity=touch]) #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window[uidensity=compact] #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window[uidensity=touch] #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon {
+  list-style-image: url("./../../image/bf_ie11_b.png") !important;
+}
+
+#main-window:not([uidensity=compact]):not([uidensity=touch]) #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window[uidensity=compact] #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window[uidensity=touch] #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon {
+  list-style-image: url("./../../image/bf_ie11_f.png") !important;
+}
+
+#main-window #navigator-toolbox #nav-bar :is(#back-button, #forward-button)[disabled] .toolbarbutton-icon {
+  filter: grayscale(100%) contrast(100%) brightness(1.5) !important;
+}
+
diff --git a/current/css/buttons/custom_backforward_large_phoenix.css b/current/css/buttons/custom_backforward_large_phoenix.css
new file mode 100644
index 00000000..63538759
--- /dev/null
+++ b/current/css/buttons/custom_backforward_large_phoenix.css
@@ -0,0 +1,21 @@
+/* Firefox userChrome.css tweaks ********************************************************/
+/* Github: https://github.com/aris-t2/customcssforfx ************************************/
+/****************************************************************************************/
+
+
+@import "./custom_backforward_large.css";
+
+/* custom large back-forward buttons */
+#main-window:not([uidensity=compact]):not([uidensity=touch]) #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window[uidensity=compact] #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window[uidensity=touch] #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon {
+  list-style-image: url("./../../image/bf_phx_b.png") !important;
+}
+
+#main-window:not([uidensity=compact]):not([uidensity=touch]) #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window[uidensity=compact] #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window[uidensity=touch] #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon {
+  list-style-image: url("./../../image/bf_phx_f.png") !important;
+}
diff --git a/current/css/buttons/custom_backforward_small_ie11.css b/current/css/buttons/custom_backforward_small_ie11.css
new file mode 100644
index 00000000..5d973d80
--- /dev/null
+++ b/current/css/buttons/custom_backforward_small_ie11.css
@@ -0,0 +1,24 @@
+/* Firefox userChrome.css tweaks ********************************************************/
+/* Github: https://github.com/aris-t2/customcssforfx ************************************/
+/****************************************************************************************/
+
+
+@import "./custom_backforward_small.css";
+
+#main-window:not([uidensity=compact]):not([uidensity=touch]) #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window[uidensity=compact] #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window[uidensity=touch] #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon {
+  list-style-image: url("./../../image/bf_ie11_small_b.png") !important;
+}
+
+#main-window:not([uidensity=compact]):not([uidensity=touch]) #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window[uidensity=compact] #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window[uidensity=touch] #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon {
+  list-style-image: url("./../../image/bf_ie11_small_f.png") !important;
+}
+
+#main-window #navigator-toolbox #nav-bar :is(#back-button, #forward-button)[disabled] .toolbarbutton-icon {
+  filter: grayscale(100%) contrast(100%) brightness(1.5) !important;
+}
diff --git a/current/css/buttons/custom_backforward_small_phoenix.css b/current/css/buttons/custom_backforward_small_phoenix.css
new file mode 100644
index 00000000..f6327f2b
--- /dev/null
+++ b/current/css/buttons/custom_backforward_small_phoenix.css
@@ -0,0 +1,20 @@
+/* Firefox userChrome.css tweaks ********************************************************/
+/* Github: https://github.com/aris-t2/customcssforfx ************************************/
+/****************************************************************************************/
+
+
+@import "./custom_backforward_small.css";
+
+#main-window:not([uidensity=compact]):not([uidensity=touch]) #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window[uidensity=compact] #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window[uidensity=touch] #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon,
+#main-window #navigator-toolbox #nav-bar #back-button .toolbarbutton-icon {
+  list-style-image: url("./../../image/bf_phx_small_b.png") !important;
+}
+
+#main-window:not([uidensity=compact]):not([uidensity=touch]) #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window[uidensity=compact] #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window[uidensity=touch] #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon,
+#main-window #navigator-toolbox #nav-bar #forward-button .toolbarbutton-icon {
+  list-style-image: url("./../../image/bf_phx_small_f.png") !important;
+}
diff --git a/current/css/generalui/popup_compact_menus.css b/current/css/generalui/popup_compact_menus.css
index cf161522..4c8f583d 100644
--- a/current/css/generalui/popup_compact_menus.css
+++ b/current/css/generalui/popup_compact_menus.css
@@ -41,6 +41,10 @@ menupopup[type=arrow] > menu {
   padding: 0px !important;
 }
 
+menuseparator {
+  padding-block: 0 !important;
+}
+
 * menupopup[type=arrow],
 :is(menupopup, panel)[type=arrow] {
   --panel-padding: 0px !important;
diff --git a/current/css/generalui/set_as_desktop_background_menuitems_hidden.css b/current/css/generalui/set_as_desktop_background_menuitems_hidden.css
index b3f955b4..09029f44 100644
--- a/current/css/generalui/set_as_desktop_background_menuitems_hidden.css
+++ b/current/css/generalui/set_as_desktop_background_menuitems_hidden.css
@@ -3,6 +3,7 @@
 /****************************************************************************************/
 
 
-#context-setDesktopBackground {
+#context-setDesktopBackground,
+#context-setDesktopBackground + menuseparator {
   display: none !important;
 }
diff --git a/current/css/locationbar/ac_popup_megabar_result_highlighting_aero.css b/current/css/locationbar/ac_popup_megabar_result_highlighting_aero.css
index 15ca6054..8c3e17e8 100644
--- a/current/css/locationbar/ac_popup_megabar_result_highlighting_aero.css
+++ b/current/css/locationbar/ac_popup_megabar_result_highlighting_aero.css
@@ -5,9 +5,6 @@
 
 #PopupSearchAutoComplete :is(richlistitem,button):is(:hover,[selected]),   /* apply code to search popup too */
 .urlbarView button:is(:hover,:hover:active,[selected]),
-#urlbar-results .urlbarView-row[selected] .urlbarView-row-inner,
-#urlbar-results .urlbarView-row[aria-selected="true"] .urlbarView-row-inner, 
-#urlbar-results .urlbarView-row:hover .urlbarView-row-inner,
 .urlbarView-row[row-selectable]:not([selected]):hover,
 .urlbarView-row[selected] {
   color: inherit !important;
@@ -18,10 +15,17 @@
 	linear-gradient(to top, rgba(255,255,255,0.3) 0px, transparent 0px),
 	linear-gradient(to bottom, rgba(163,196,247,0.2), rgba(122,180,246,0.2)) !important;
   border-radius: 6px !important;
-  border: 1px solid rgba(124,163,206,0) !important;
   outline: 1px solid rgba(124,163,206,0.5) !important;
   outline-radius: 0px !important;
-  outline-offset: -2px !important;
+  outline-offset: -3px !important;
+}
+
+#PopupSearchAutoComplete :is(richlistitem,button):is(:hover,[selected]) {
+  outline-offset: -1px !important;
+}
+
+.urlbarView button:is(:hover,:hover:active,[selected]) {
+  outline-offset: 0px !important;
 }
 
 #urlbar-results .urlbarView-row[selected] .urlbarView-title, 
diff --git a/current/css/locationbar/identitybox_labels_hidden.css b/current/css/locationbar/identitybox_labels_hidden.css
index 65502a72..46685aa4 100644
--- a/current/css/locationbar/identitybox_labels_hidden.css
+++ b/current/css/locationbar/identitybox_labels_hidden.css
@@ -8,6 +8,11 @@
   display: none !important;
 }
 
+#identity-box[pageproxystate="valid"]:is(.notSecureText, .chromeUI, .extensionPage) > .identity-box-button,
+#urlbar-label-box {
+  padding-inline: 6px !important;
+}
+
 #identity-box {
   padding-inline-end: 4px !important;
   margin-inline-end: 4px !important;
diff --git a/current/css/tabs/classic_squared_tabs.css b/current/css/tabs/classic_squared_tabs.css
index 8e4fbb18..da76c66e 100644
--- a/current/css/tabs/classic_squared_tabs.css
+++ b/current/css/tabs/classic_squared_tabs.css
@@ -486,8 +486,8 @@
   height: 16px !important;
 }
 
-:is(#TabsToolbar,#vertical-tabs)-customization-target > toolbarpaletteitem toolbarbutton .toolbarbutton-icon,
-:is(#TabsToolbar,#vertical-tabs)-customization-target > toolbarbutton .toolbarbutton-icon {
+#TabsToolbar-customization-target > toolbarpaletteitem toolbarbutton .toolbarbutton-icon,
+#TabsToolbar-customization-target > toolbarbutton .toolbarbutton-icon {
   padding: unset !important;
   height: unset !important;
   width: unset !important;
diff --git a/current/css/tabs/classic_squared_tabs_australized.css b/current/css/tabs/classic_squared_tabs_australized.css
index ec594c47..b8c0b801 100644
--- a/current/css/tabs/classic_squared_tabs_australized.css
+++ b/current/css/tabs/classic_squared_tabs_australized.css
@@ -464,8 +464,8 @@
   height: 16px !important;
 }
 
-:is(#TabsToolbar,#vertical-tabs)-customization-target > toolbarpaletteitem toolbarbutton .toolbarbutton-icon,
-:is(#TabsToolbar,#vertical-tabs)-customization-target > toolbarbutton .toolbarbutton-icon {
+#TabsToolbar-customization-target > toolbarpaletteitem toolbarbutton .toolbarbutton-icon,
+#TabsToolbar-customization-target > toolbarbutton .toolbarbutton-icon {
   padding: unset !important;
   height: unset !important;
   width: unset !important;
diff --git a/current/css/tabs/default_tabs_with_colors.css b/current/css/tabs/default_tabs_with_colors.css
index e14132d4..7c855bab 100644
--- a/current/css/tabs/default_tabs_with_colors.css
+++ b/current/css/tabs/default_tabs_with_colors.css
@@ -45,4 +45,4 @@
 	  background-image: var(--classic_squared_tabs_lwt-dark_hovered_tabs) !important;
 	}
 
-}
\ No newline at end of file
+}
diff --git a/current/css/tabs/missing_tab_favicon_restored_dotted.css b/current/css/tabs/missing_tab_favicon_restored_dotted.css
index d78b4afe..a4526bd4 100644
--- a/current/css/tabs/missing_tab_favicon_restored_dotted.css
+++ b/current/css/tabs/missing_tab_favicon_restored_dotted.css
@@ -23,4 +23,4 @@
 .tab-icon-image:not([busy], [src]) {
   content: url('./../../image/tab_favicon_dotted.png') !important;
   display: inline !important;
-}
\ No newline at end of file
+}
diff --git a/current/image/bf_ie11_b.png b/current/image/bf_ie11_b.png
new file mode 100644
index 00000000..f0b63a08
Binary files /dev/null and b/current/image/bf_ie11_b.png differ
diff --git a/current/image/bf_ie11_f.png b/current/image/bf_ie11_f.png
new file mode 100644
index 00000000..9b603f9f
Binary files /dev/null and b/current/image/bf_ie11_f.png differ
diff --git a/current/image/bf_ie11_small_b.png b/current/image/bf_ie11_small_b.png
new file mode 100644
index 00000000..5f881dc3
Binary files /dev/null and b/current/image/bf_ie11_small_b.png differ
diff --git a/current/image/bf_ie11_small_f.png b/current/image/bf_ie11_small_f.png
new file mode 100644
index 00000000..b4e60db6
Binary files /dev/null and b/current/image/bf_ie11_small_f.png differ
diff --git a/current/image/bf_phx_b.png b/current/image/bf_phx_b.png
new file mode 100644
index 00000000..cfbc2ad8
Binary files /dev/null and b/current/image/bf_phx_b.png differ
diff --git a/current/image/bf_phx_f.png b/current/image/bf_phx_f.png
new file mode 100644
index 00000000..30970d21
Binary files /dev/null and b/current/image/bf_phx_f.png differ
diff --git a/current/image/bf_phx_small_b.png b/current/image/bf_phx_small_b.png
new file mode 100644
index 00000000..59a1d704
Binary files /dev/null and b/current/image/bf_phx_small_b.png differ
diff --git a/current/image/bf_phx_small_f.png b/current/image/bf_phx_small_f.png
new file mode 100644
index 00000000..c5715f24
Binary files /dev/null and b/current/image/bf_phx_small_f.png differ
diff --git a/current/userChrome.css b/current/userChrome.css
index f6dee1af..f3c7c1a3 100644
--- a/current/userChrome.css
+++ b/current/userChrome.css
@@ -2,7 +2,7 @@
   Firefox userChrome.css tweaks: main file
   
   Custom CSS for Firefox 115+
-  Current version: 4.5.8
+  Current version: 4.5.9
 
   Based on 'Classic Theme Restorer' & 'Classic Toolbar Buttons' add-ons CSS code 
   Github: https://github.com/aris-t2/customcssforfx
@@ -360,7 +360,9 @@
 /* @import "./css/buttons/custom_backforward_large_ff3_strata_red.css"; /**/
 /* @import "./css/buttons/custom_backforward_large_ie8.css"; /**/
 /* @import "./css/buttons/custom_backforward_large_ie9.css"; /**/
+/* @import "./css/buttons/custom_backforward_large_ie11.css"; /**/
 /* @import "./css/buttons/custom_backforward_large_kempelton.css"; /**/
+/* @import "./css/buttons/custom_backforward_large_phoenix.css"; /**/
 /* @import "./css/buttons/custom_backforward_large_noia.css"; /**/
 /* @import "./css/buttons/custom_backforward_small_ff3.css"; /**/
 /* @import "./css/buttons/custom_backforward_small_ff3_strata.css"; /**/
@@ -368,7 +370,9 @@
 /* @import "./css/buttons/custom_backforward_small_ff3_strata_red.css"; /**/
 /* @import "./css/buttons/custom_backforward_small_ie8.css"; /**/
 /* @import "./css/buttons/custom_backforward_small_ie9.css"; /**/
+/* @import "./css/buttons/custom_backforward_small_ie11.css"; /**/
 /* @import "./css/buttons/custom_backforward_small_kempelton.css"; /**/
+/* @import "./css/buttons/custom_backforward_small_phoenix.css"; /**/
 /* @import "./css/buttons/custom_backforward_connected.css"; /**/ /* round */
 /* @import "./css/buttons/custom_backforward_connected_to_location_bar.css"; /**/ /* round */
 /* @import "./css/buttons/custom_backforward_connected_alt.css"; /**/ /* squared*/