diff --git a/CREDITS b/CREDITS
index ee1183f..22c743c 100644
--- a/CREDITS
+++ b/CREDITS
@@ -40,6 +40,10 @@ W: https://github.com/Cyberax
 N: AuRiMaS666
 W: https://github.com/AuRiMaS666
 
+N: firefox9067
+E: firefox@snowdot.kr
+W: https://github.com/firefox9067
+
 N: Jani Haiko
 E: haiko.jani@gmail.com
 W: https://github.com/ojaha065
diff --git a/README.org b/README.org
index 1a85d5b..216b1da 100644
--- a/README.org
+++ b/README.org
@@ -210,6 +210,7 @@ Thanks to all sponsors & contributors to this project for providing help and dev
 [[https://github.com/Mike-Kennelly][@@html:<img src="https://avatars.githubusercontent.com/u/151653777?s=60&v=4"/>@@]]
 [[https://github.com/Cyberax][@@html:<img width="60" height="60" src="https://avatars.githubusercontent.com/u/1136550?s=60&v=4"/>@@]]
 [[https://github.com/AuRiMaS666][@@html:<img width="60" height="60" src="https://avatars.githubusercontent.com/u/59185222?s=60&v=4"/>@@]]
+[[https://github.com/firefox9067][@@html:<img width="60" height="60" src="https://avatars.githubusercontent.com/u/80527364?s=60&v=4"/>@@]]
 
 - A donation was received from Safira on [[https://ko-fi.com/home/coffeeshop?txid=97e5fa0d-c73e-4308-a2fd-6b44b08cd828][Ko-Fi]]
 - Private sponsors: 3
diff --git a/css/leptonChrome.css b/css/leptonChrome.css
index 42fc5d4..ac295ed 100644
--- a/css/leptonChrome.css
+++ b/css/leptonChrome.css
@@ -102,22 +102,26 @@
   }
   /*= Light Weight Theme =======================================================*/
   /* Header Image */
-  :root[lwtheme-image] {
+  :root[lwtheme-image] > body {
     background-image: var(--lwt-header-image) !important; /* Original: var(--lwt-header-image) */
     background-repeat: no-repeat !important;
     background-position: right top !important;
+    background-color: var(--lwt-accent-color, Window) !important;
+  }
+  :root[lwtheme-image] > body:-moz-window-inactive {
+    background-color: var(--lwt-accent-color-inactive, var(--lwt-accent-color)) !important;
   }
   @media (min-width: 2500px) {
-    :root[lwtheme-image] {
+    :root[lwtheme-image] > body {
       background-size: contain;
     }
     @supports -moz-bool-pref("userChrome.compatibility.covered_header_image") {
-      :root[lwtheme-image] {
+      :root[lwtheme-image] > body {
         background-size: cover;
       }
     }
   }
-  :root[lwtheme-image] #navigator-toolbox:-moz-lwtheme {
+  :root[lwtheme-image] > body #navigator-toolbox:-moz-lwtheme {
     background-image: var(--lwt-header-image), var(--lwt-additional-images) !important;
     background-repeat: var(--lwt-background-tiling) !important;
     background-position: var(--lwt-background-alignment) !important;
@@ -128,6 +132,9 @@
     --tabs-border-color: rgba(0, 0, 0, 0.4); /* Legacy: v96, (0, 0, 0, 0.3) -> (0, 0, 0, 0.4)  */
     --lwt-tabs-border-color: rgba(0, 0, 0, 0.4);
   }
+  #customization-container {
+    background-color: transparent !important; /* Original: color-mix(in srgb, -moz-dialog 85%, white) */
+  }
   /*= Findbar Border Color =====================================================*/
   html|input.findbar-textbox {
     border: 1px solid var(--input-border-color, var(--toolbar-field-border-color, ThreeDShadow)) !important; /* Original: 1px solid var(--input-border-color, var(--toolbar-field-border-color)) */
@@ -763,6 +770,15 @@
         --urlbar-popup-url-color: -moz-accent-color;
       }
     }
+    :root:not(:-moz-lwtheme) {
+      --toolbar-field-background-color: Field !important;
+      --toolbar-field-color: FieldText !important;
+      --toolbar-field-border-color: ThreeDShadow !important;
+    }
+    :root:not(:-moz-lwtheme) #urlbar-background,
+    :root:not(:-moz-lwtheme) #searchbar {
+      background-color: var(--toolbar-field-background-color) !important;
+    }
   }
   /*= Mac - Default like color =================================================*/
   @supports -moz-bool-pref("layout.css.osx-font-smoothing.enabled") {
@@ -3674,19 +3690,35 @@
         transition-delay: 0s, 0s, 0.25s !important;
       }
     }
-    /*- Full Screen ------------------------------------------------------------*/
+    /*- Titlebar & Full Screen -------------------------------------------------*/
+    #titlebar {
+      will-change: background-color !important;
+      transition: background-color 0.2s var(--animation-easing-function) !important;
+    }
+    #titlebar:-moz-window-inactive {
+      transition: background-color 0.5s var(--animation-easing-function) !important;
+    }
     #navigator-toolbox {
       /* Full screen out */
-      transition: margin-top 1s ease;
+      will-change: margin-top, background-color !important;
+      transition: margin-top 1s ease, background-color 0.2s var(--animation-easing-function) !important;
       transform-origin: top;
     }
+    #navigator-toolbox:-moz-window-inactive {
+      transition: margin-top 1s ease, background-color 0.5s var(--animation-easing-function) !important;
+    }
     #navigator-toolbox[inFullscreen="true"] {
       /* Full screen enter */
       animation-duration: 1s;
       animation-name: fullscreen;
       animation-timing-function: ease;
       /* Full screen navbar not hover */
-      transition: margin-top 1.3s var(--animation-easing-function) 50ms;
+      transition: margin-top 1.3s var(--animation-easing-function) 50ms,
+        background-color 0.2s var(--animation-easing-function) !important;
+    }
+    #navigator-toolbox[inFullscreen="true"]:-moz-window-inactive {
+      transition: margin-top 1.3s var(--animation-easing-function) 50ms,
+        background-color 0.5s var(--animation-easing-function) !important;
     }
     #navigator-toolbox[inFullscreen="true"]:hover {
       margin-top: 0 !important;
@@ -5289,9 +5321,6 @@
           }
         }
         @media (-moz-platform: windows) {
-          :root[sizemode="maximized"][tabsintitlebar] {
-            --uc-titlebar-padding: 8px;
-          }
           :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
             margin-top: calc(-1 * var(--uc-titlebar-padding));
           }
@@ -5362,6 +5391,15 @@
           :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
             visibility: collapse !important;
           }
+          :root[tabsintitlebar] #titlebar {
+            z-index: 1;
+          }
+          :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+            opacity: 1 !important;
+          }
+          :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+            opacity: var(--inactive-titlebar-opacity);
+          }
         }
         /* At Activated Menubar */
         :root:not([chromehidden~="menubar"], [sizemode="fullscreen"])
@@ -5436,9 +5474,6 @@
             }
           }
           @media (-moz-platform: windows) {
-            :root[sizemode="maximized"][tabsintitlebar] {
-              --uc-titlebar-padding: 8px;
-            }
             :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
               margin-top: calc(-1 * var(--uc-titlebar-padding));
             }
@@ -5509,6 +5544,15 @@
             :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
               visibility: collapse !important;
             }
+            :root[tabsintitlebar] #titlebar {
+              z-index: 1;
+            }
+            :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+              opacity: 1 !important;
+            }
+            :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+              opacity: var(--inactive-titlebar-opacity);
+            }
           }
           /* At Activated Menubar */
           :root:not([chromehidden~="menubar"], [sizemode="fullscreen"])
@@ -5580,9 +5624,6 @@
             }
           }
           @media (-moz-platform: windows) {
-            :root[sizemode="maximized"][tabsintitlebar] {
-              --uc-titlebar-padding: 8px;
-            }
             :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
               margin-top: calc(-1 * var(--uc-titlebar-padding));
             }
@@ -5653,6 +5694,15 @@
             :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
               visibility: collapse !important;
             }
+            :root[tabsintitlebar] #titlebar {
+              z-index: 1;
+            }
+            :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+              opacity: 1 !important;
+            }
+            :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+              opacity: var(--inactive-titlebar-opacity);
+            }
           }
           /* At Activated Menubar */
           :root:not([chromehidden~="menubar"], [sizemode="fullscreen"])
@@ -5733,9 +5783,6 @@
             }
           }
           @media screen and (max-width: 1100px) and (-moz-platform: windows) {
-            :root[sizemode="maximized"][tabsintitlebar] {
-              --uc-titlebar-padding: 8px;
-            }
             :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
               margin-top: calc(-1 * var(--uc-titlebar-padding));
             }
@@ -5815,6 +5862,15 @@
               :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
                 visibility: collapse !important;
               }
+              :root[tabsintitlebar] #titlebar {
+                z-index: 1;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+                opacity: 1 !important;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+                opacity: var(--inactive-titlebar-opacity);
+              }
             }
           }
           @media screen and (max-width: 1100px) {
@@ -5893,9 +5949,6 @@
               }
             }
             @media screen and (min-width: 1100px) and (-moz-platform: windows) {
-              :root[sizemode="maximized"][tabsintitlebar] {
-                --uc-titlebar-padding: 8px;
-              }
               :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
                 margin-top: calc(-1 * var(--uc-titlebar-padding));
               }
@@ -5966,6 +6019,15 @@
               :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
                 visibility: collapse !important;
               }
+              :root[tabsintitlebar] #titlebar {
+                z-index: 1;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+                opacity: 1 !important;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+                opacity: var(--inactive-titlebar-opacity);
+              }
             }
             /* At Activated Menubar */
             :root:not([chromehidden~="menubar"], [sizemode="fullscreen"])
@@ -6039,9 +6101,6 @@
               }
             }
             @media screen and (min-width: 1100px) and (-moz-platform: windows) {
-              :root[sizemode="maximized"][tabsintitlebar] {
-                --uc-titlebar-padding: 8px;
-              }
               :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
                 margin-top: calc(-1 * var(--uc-titlebar-padding));
               }
@@ -6112,6 +6171,15 @@
               :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
                 visibility: collapse !important;
               }
+              :root[tabsintitlebar] #titlebar {
+                z-index: 1;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+                opacity: 1 !important;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+                opacity: var(--inactive-titlebar-opacity);
+              }
             }
             /* At Activated Menubar */
             :root:not([chromehidden~="menubar"], [sizemode="fullscreen"])
@@ -6697,6 +6765,7 @@
   .tab-background:is([selected], [multiselected]) {
     background-color: var(--tab-selected-bgcolor, var(--toolbar-bgcolor)) !important;
   }
+  #tabbrowser-arrowscrollbox > .tabbrowser-tab > .tab-stack > .tab-background[selected]:-moz-lwtheme,
   #tabbrowser-tabs:not([movingtab])
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab
@@ -6706,8 +6775,16 @@
     */
     background-image: linear-gradient(transparent, transparent),
       linear-gradient(var(--toolbar-bgcolor), var(--toolbar-bgcolor)), var(--lwt-header-image, none) !important;
+    background-position: 0, 0, right top;
+    background-attachment: scroll, scroll, fixed;
+    background-repeat: repeat-x, repeat-x, no-repeat !important;
   }
   @supports -moz-bool-pref("userChrome.theme.transparent.frame") {
+    :root:not([lwtheme-image])
+      #tabbrowser-arrowscrollbox
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected]:-moz-lwtheme,
     :root:not([lwtheme-image])
       #tabbrowser-tabs:not([movingtab])
       > #tabbrowser-arrowscrollbox
@@ -13424,24 +13501,28 @@
   }
 }
 @media (-moz-bool-pref: "userChrome.compatibility.theme") {
-  :root[lwtheme-image] {
+  :root[lwtheme-image] > body {
     background-image: var(--lwt-header-image) !important; /* Original: var(--lwt-header-image) */
     background-repeat: no-repeat !important;
     background-position: right top !important;
+    background-color: var(--lwt-accent-color, Window) !important;
+  }
+  :root[lwtheme-image] > body:-moz-window-inactive {
+    background-color: var(--lwt-accent-color-inactive, var(--lwt-accent-color)) !important;
   }
 }
 @media (-moz-bool-pref: "userChrome.compatibility.theme") and (min-width: 2500px) {
-  :root[lwtheme-image] {
+  :root[lwtheme-image] > body {
     background-size: contain;
   }
 }
 @media (-moz-bool-pref: "userChrome.compatibility.theme") and (min-width: 2500px) and (-moz-bool-pref: "userChrome.compatibility.covered_header_image") {
-  :root[lwtheme-image] {
+  :root[lwtheme-image] > body {
     background-size: cover;
   }
 }
 @media (-moz-bool-pref: "userChrome.compatibility.theme") {
-  :root[lwtheme-image] #navigator-toolbox:-moz-lwtheme {
+  :root[lwtheme-image] > body #navigator-toolbox:-moz-lwtheme {
     background-image: var(--lwt-header-image), var(--lwt-additional-images) !important;
     background-repeat: var(--lwt-background-tiling) !important;
     background-position: var(--lwt-background-alignment) !important;
@@ -13454,6 +13535,11 @@
     --lwt-tabs-border-color: rgba(0, 0, 0, 0.4);
   }
 }
+@media (-moz-bool-pref: "userChrome.compatibility.theme") {
+  #customization-container {
+    background-color: transparent !important; /* Original: color-mix(in srgb, -moz-dialog 85%, white) */
+  }
+}
 @media (-moz-bool-pref: "userChrome.compatibility.theme") {
   html|input.findbar-textbox {
     border: 1px solid var(--input-border-color, var(--toolbar-field-border-color, ThreeDShadow)) !important; /* Original: 1px solid var(--input-border-color, var(--toolbar-field-border-color)) */
@@ -14086,6 +14172,17 @@
     --urlbar-popup-url-color: -moz-accent-color;
   }
 }
+@media (-moz-bool-pref: "userChrome.theme.system_default") and (-moz-gtk-csd-available) {
+  :root:not(:-moz-lwtheme) {
+    --toolbar-field-background-color: Field !important;
+    --toolbar-field-color: FieldText !important;
+    --toolbar-field-border-color: ThreeDShadow !important;
+  }
+  :root:not(:-moz-lwtheme) #urlbar-background,
+  :root:not(:-moz-lwtheme) #searchbar {
+    background-color: var(--toolbar-field-background-color) !important;
+  }
+}
 @media (-moz-bool-pref: "userChrome.theme.system_default") and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled") {
   :root:not(:-moz-lwtheme),
   :root[lwt-default-theme-in-dark-mode] {
@@ -17023,7 +17120,7 @@
   /* Buttons in URL bar */
   /*- Border - Other Fields --------------------------------------------------*/
   /*- Sidebar ----------------------------------------------------------------*/
-  /*- Full Screen ------------------------------------------------------------*/
+  /*- Titlebar & Full Screen -------------------------------------------------*/
   /*- Expand - Synced Tabs ---------------------------------------------------*/
   /*- Arrow - Synced Tabs ----------------------------------------------------*/
   /*- Arrow - Edit Bookmark Popup --------------------------------------------*/
@@ -17135,19 +17232,37 @@
     transition-delay: 0s, 0s, 0.25s !important;
   }
 }
+@media (prefers-reduced-motion: no-preference) and (-moz-bool-pref: "userChrome.decoration.animate") {
+  #titlebar {
+    will-change: background-color !important;
+    transition: background-color 0.2s var(--animation-easing-function) !important;
+  }
+  #titlebar:-moz-window-inactive {
+    transition: background-color 0.5s var(--animation-easing-function) !important;
+  }
+}
 @media (prefers-reduced-motion: no-preference) and (-moz-bool-pref: "userChrome.decoration.animate") {
   #navigator-toolbox {
     /* Full screen out */
-    transition: margin-top 1s ease;
+    will-change: margin-top, background-color !important;
+    transition: margin-top 1s ease, background-color 0.2s var(--animation-easing-function) !important;
     transform-origin: top;
   }
+  #navigator-toolbox:-moz-window-inactive {
+    transition: margin-top 1s ease, background-color 0.5s var(--animation-easing-function) !important;
+  }
   #navigator-toolbox[inFullscreen="true"] {
     /* Full screen enter */
     animation-duration: 1s;
     animation-name: fullscreen;
     animation-timing-function: ease;
     /* Full screen navbar not hover */
-    transition: margin-top 1.3s var(--animation-easing-function) 50ms;
+    transition: margin-top 1.3s var(--animation-easing-function) 50ms,
+      background-color 0.2s var(--animation-easing-function) !important;
+  }
+  #navigator-toolbox[inFullscreen="true"]:-moz-window-inactive {
+    transition: margin-top 1.3s var(--animation-easing-function) 50ms,
+      background-color 0.5s var(--animation-easing-function) !important;
   }
   #navigator-toolbox[inFullscreen="true"]:hover {
     margin-top: 0 !important;
@@ -18916,9 +19031,6 @@
   (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (not (-moz-bool-pref: "userChrome.tabbar.one_liner")) and (-moz-bool-pref: "userChrome.hidden.tabbar") and (-moz-platform: windows),
   (-moz-bool-pref: "userChrome.hidden.tabbar") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (not (-moz-bool-pref: "userChrome.tabbar.one_liner")) and (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (-moz-platform: windows),
   (-moz-bool-pref: "userChrome.hidden.tabbar") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (not (-moz-bool-pref: "userChrome.tabbar.one_liner")) and (-moz-bool-pref: "userChrome.hidden.tabbar") and (-moz-platform: windows) {
-  :root[sizemode="maximized"][tabsintitlebar] {
-    --uc-titlebar-padding: 8px;
-  }
   :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
     margin-top: calc(-1 * var(--uc-titlebar-padding));
   }
@@ -19027,6 +19139,15 @@
   :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
     visibility: collapse !important;
   }
+  :root[tabsintitlebar] #titlebar {
+    z-index: 1;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+    opacity: 1 !important;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+    opacity: var(--inactive-titlebar-opacity);
+  }
 }
 @media (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (not (-moz-bool-pref: "userChrome.tabbar.one_liner")) and (-moz-bool-pref: "userChrome.tabbar.on_bottom"),
   (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (not (-moz-bool-pref: "userChrome.tabbar.one_liner")) and (-moz-bool-pref: "userChrome.hidden.tabbar"),
@@ -19134,9 +19255,6 @@
 @media (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive")) and (-moz-bool-pref: "userChrome.tabbar.one_liner.tabbar_first") and (-moz-platform: windows),
   (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive")) and (-moz-bool-pref: "userChrome.tabbar.one_liner.tabbar_first") and (-moz-platform: windows),
   (-moz-bool-pref: "userChrome.hidden.tabbar") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive")) and (-moz-bool-pref: "userChrome.tabbar.one_liner.tabbar_first") and (-moz-platform: windows) {
-  :root[sizemode="maximized"][tabsintitlebar] {
-    --uc-titlebar-padding: 8px;
-  }
   :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
     margin-top: calc(-1 * var(--uc-titlebar-padding));
   }
@@ -19221,6 +19339,15 @@
   :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
     visibility: collapse !important;
   }
+  :root[tabsintitlebar] #titlebar {
+    z-index: 1;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+    opacity: 1 !important;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+    opacity: var(--inactive-titlebar-opacity);
+  }
 }
 @media (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive")) and (-moz-bool-pref: "userChrome.tabbar.one_liner.tabbar_first"),
   (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive")) and (-moz-bool-pref: "userChrome.tabbar.one_liner.tabbar_first"),
@@ -19322,9 +19449,6 @@
 @media (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive")) and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled") and (-moz-platform: windows),
   (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive")) and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled") and (-moz-platform: windows),
   (-moz-bool-pref: "userChrome.hidden.tabbar") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive")) and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled") and (-moz-platform: windows) {
-  :root[sizemode="maximized"][tabsintitlebar] {
-    --uc-titlebar-padding: 8px;
-  }
   :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
     margin-top: calc(-1 * var(--uc-titlebar-padding));
   }
@@ -19409,6 +19533,15 @@
   :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
     visibility: collapse !important;
   }
+  :root[tabsintitlebar] #titlebar {
+    z-index: 1;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+    opacity: 1 !important;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+    opacity: var(--inactive-titlebar-opacity);
+  }
 }
 @media (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive")) and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled"),
   (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive")) and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled"),
@@ -19540,9 +19673,6 @@
   screen and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (-moz-bool-pref: "userChrome.hidden.tabbar") and (max-width: 1100px) and (-moz-platform: windows),
   screen and (-moz-bool-pref: "userChrome.hidden.tabbar") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (max-width: 1100px) and (-moz-platform: windows),
   screen and (-moz-bool-pref: "userChrome.hidden.tabbar") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (-moz-bool-pref: "userChrome.hidden.tabbar") and (max-width: 1100px) and (-moz-platform: windows) {
-  :root[sizemode="maximized"][tabsintitlebar] {
-    --uc-titlebar-padding: 8px;
-  }
   :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
     margin-top: calc(-1 * var(--uc-titlebar-padding));
   }
@@ -19651,6 +19781,15 @@
   :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
     visibility: collapse !important;
   }
+  :root[tabsintitlebar] #titlebar {
+    z-index: 1;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+    opacity: 1 !important;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+    opacity: var(--inactive-titlebar-opacity);
+  }
 }
 @media screen and (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (max-width: 1100px),
   screen and (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (-moz-bool-pref: "userChrome.hidden.tabbar") and (max-width: 1100px),
@@ -19758,9 +19897,6 @@
 @media screen and (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (min-width: 1100px) and (-moz-bool-pref: "userChrome.tabbar.one_liner.tabbar_first") and (-moz-platform: windows),
   screen and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (min-width: 1100px) and (-moz-bool-pref: "userChrome.tabbar.one_liner.tabbar_first") and (-moz-platform: windows),
   screen and (-moz-bool-pref: "userChrome.hidden.tabbar") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (min-width: 1100px) and (-moz-bool-pref: "userChrome.tabbar.one_liner.tabbar_first") and (-moz-platform: windows) {
-  :root[sizemode="maximized"][tabsintitlebar] {
-    --uc-titlebar-padding: 8px;
-  }
   :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
     margin-top: calc(-1 * var(--uc-titlebar-padding));
   }
@@ -19845,6 +19981,15 @@
   :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
     visibility: collapse !important;
   }
+  :root[tabsintitlebar] #titlebar {
+    z-index: 1;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+    opacity: 1 !important;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+    opacity: var(--inactive-titlebar-opacity);
+  }
 }
 @media screen and (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (min-width: 1100px) and (-moz-bool-pref: "userChrome.tabbar.one_liner.tabbar_first"),
   screen and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (min-width: 1100px) and (-moz-bool-pref: "userChrome.tabbar.one_liner.tabbar_first"),
@@ -19946,9 +20091,6 @@
 @media screen and (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (min-width: 1100px) and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled") and (-moz-platform: windows),
   screen and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (min-width: 1100px) and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled") and (-moz-platform: windows),
   screen and (-moz-bool-pref: "userChrome.hidden.tabbar") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (min-width: 1100px) and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled") and (-moz-platform: windows) {
-  :root[sizemode="maximized"][tabsintitlebar] {
-    --uc-titlebar-padding: 8px;
-  }
   :root[sizemode="maximized"][tabsintitlebar] #navigator-toolbox-background {
     margin-top: calc(-1 * var(--uc-titlebar-padding));
   }
@@ -20033,6 +20175,15 @@
   :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
     visibility: collapse !important;
   }
+  :root[tabsintitlebar] #titlebar {
+    z-index: 1;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+    opacity: 1 !important;
+  }
+  :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+    opacity: var(--inactive-titlebar-opacity);
+  }
 }
 @media screen and (-moz-bool-pref: "userChrome.tabbar.on_bottom") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (min-width: 1100px) and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled"),
   screen and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (not (-moz-bool-pref: "userChrome.hidden.titlebar_container")) and (-moz-bool-pref: "userChrome.tabbar.one_liner") and (-moz-bool-pref: "userChrome.tabbar.one_liner.responsive") and (min-width: 1100px) and (-moz-bool-pref: "layout.css.osx-font-smoothing.enabled"),
@@ -20603,6 +20754,7 @@
   .tab-background:is([selected], [multiselected]) {
     background-color: var(--tab-selected-bgcolor, var(--toolbar-bgcolor)) !important;
   }
+  #tabbrowser-arrowscrollbox > .tabbrowser-tab > .tab-stack > .tab-background[selected]:-moz-lwtheme,
   #tabbrowser-tabs:not([movingtab])
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab
@@ -20612,9 +20764,17 @@
     */
     background-image: linear-gradient(transparent, transparent),
       linear-gradient(var(--toolbar-bgcolor), var(--toolbar-bgcolor)), var(--lwt-header-image, none) !important;
+    background-position: 0, 0, right top;
+    background-attachment: scroll, scroll, fixed;
+    background-repeat: repeat-x, repeat-x, no-repeat !important;
   }
 }
 @media (-moz-bool-pref: "userChrome.tab.color_like_toolbar") and (-moz-bool-pref: "userChrome.theme.transparent.frame") {
+  :root:not([lwtheme-image])
+    #tabbrowser-arrowscrollbox
+    > .tabbrowser-tab
+    > .tab-stack
+    > .tab-background[selected]:-moz-lwtheme,
   :root:not([lwtheme-image])
     #tabbrowser-tabs:not([movingtab])
     > #tabbrowser-arrowscrollbox
diff --git a/css/leptonChromeESR.css b/css/leptonChromeESR.css
index edee2db..25f348c 100644
--- a/css/leptonChromeESR.css
+++ b/css/leptonChromeESR.css
@@ -102,22 +102,26 @@
   }
   /*= Light Weight Theme =======================================================*/
   /* Header Image */
-  :root[lwtheme-image] {
+  :root[lwtheme-image] > body {
     background-image: var(--lwt-header-image) !important; /* Original: var(--lwt-header-image) */
     background-repeat: no-repeat !important;
     background-position: right top !important;
+    background-color: var(--lwt-accent-color, Window) !important;
+  }
+  :root[lwtheme-image] > body:-moz-window-inactive {
+    background-color: var(--lwt-accent-color-inactive, var(--lwt-accent-color)) !important;
   }
   @media (min-width: 2500px) {
-    :root[lwtheme-image] {
+    :root[lwtheme-image] > body {
       background-size: contain;
     }
     @supports -moz-bool-pref("userChrome.compatibility.covered_header_image") {
-      :root[lwtheme-image] {
+      :root[lwtheme-image] > body {
         background-size: cover;
       }
     }
   }
-  :root[lwtheme-image] #navigator-toolbox:-moz-lwtheme {
+  :root[lwtheme-image] > body #navigator-toolbox:-moz-lwtheme {
     background-image: var(--lwt-header-image), var(--lwt-additional-images) !important;
     background-repeat: var(--lwt-background-tiling) !important;
     background-position: var(--lwt-background-alignment) !important;
@@ -128,6 +132,9 @@
     --tabs-border-color: rgba(0, 0, 0, 0.4); /* Legacy: v96, (0, 0, 0, 0.3) -> (0, 0, 0, 0.4)  */
     --lwt-tabs-border-color: rgba(0, 0, 0, 0.4);
   }
+  #customization-container {
+    background-color: transparent !important; /* Original: color-mix(in srgb, -moz-dialog 85%, white) */
+  }
   /*= Findbar Border Color =====================================================*/
   html|input.findbar-textbox {
     border: 1px solid var(--input-border-color, var(--toolbar-field-border-color, ThreeDShadow)) !important; /* Original: 1px solid var(--input-border-color, var(--toolbar-field-border-color)) */
@@ -982,6 +989,15 @@
         --urlbar-popup-url-color: -moz-accent-color;
       }
     }
+    :root:not(:-moz-lwtheme) {
+      --toolbar-field-background-color: Field !important;
+      --toolbar-field-color: FieldText !important;
+      --toolbar-field-border-color: ThreeDShadow !important;
+    }
+    :root:not(:-moz-lwtheme) #urlbar-background,
+    :root:not(:-moz-lwtheme) #searchbar {
+      background-color: var(--toolbar-field-background-color) !important;
+    }
   }
   /*= Mac - Default like color =================================================*/
   @supports -moz-bool-pref("layout.css.osx-font-smoothing.enabled") {
@@ -3991,19 +4007,35 @@
         transition-delay: 0s, 0s, 0.25s !important;
       }
     }
-    /*- Full Screen ------------------------------------------------------------*/
+    /*- Titlebar & Full Screen -------------------------------------------------*/
+    #titlebar {
+      will-change: background-color !important;
+      transition: background-color 0.2s var(--animation-easing-function) !important;
+    }
+    #titlebar:-moz-window-inactive {
+      transition: background-color 0.5s var(--animation-easing-function) !important;
+    }
     #navigator-toolbox {
       /* Full screen out */
-      transition: margin-top 1s ease;
+      will-change: margin-top, background-color !important;
+      transition: margin-top 1s ease, background-color 0.2s var(--animation-easing-function) !important;
       transform-origin: top;
     }
+    #navigator-toolbox:-moz-window-inactive {
+      transition: margin-top 1s ease, background-color 0.5s var(--animation-easing-function) !important;
+    }
     #navigator-toolbox[inFullscreen="true"] {
       /* Full screen enter */
       animation-duration: 1s;
       animation-name: fullscreen;
       animation-timing-function: ease;
       /* Full screen navbar not hover */
-      transition: margin-top 1.3s var(--animation-easing-function) 50ms;
+      transition: margin-top 1.3s var(--animation-easing-function) 50ms,
+        background-color 0.2s var(--animation-easing-function) !important;
+    }
+    #navigator-toolbox[inFullscreen="true"]:-moz-window-inactive {
+      transition: margin-top 1.3s var(--animation-easing-function) 50ms,
+        background-color 0.5s var(--animation-easing-function) !important;
     }
     #navigator-toolbox[inFullscreen="true"]:hover {
       margin-top: 0 !important;
@@ -5744,6 +5776,15 @@
           :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
             visibility: collapse !important;
           }
+          :root[tabsintitlebar] #titlebar {
+            z-index: 1;
+          }
+          :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+            opacity: 1 !important;
+          }
+          :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+            opacity: var(--inactive-titlebar-opacity);
+          }
         }
         /* At Activated Menubar */
         :root:not([chromehidden~="menubar"], [sizemode="fullscreen"])
@@ -5894,6 +5935,15 @@
             :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
               visibility: collapse !important;
             }
+            :root[tabsintitlebar] #titlebar {
+              z-index: 1;
+            }
+            :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+              opacity: 1 !important;
+            }
+            :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+              opacity: var(--inactive-titlebar-opacity);
+            }
           }
           /* At Activated Menubar */
           :root:not([chromehidden~="menubar"], [sizemode="fullscreen"])
@@ -6041,6 +6091,15 @@
             :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
               visibility: collapse !important;
             }
+            :root[tabsintitlebar] #titlebar {
+              z-index: 1;
+            }
+            :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+              opacity: 1 !important;
+            }
+            :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+              opacity: var(--inactive-titlebar-opacity);
+            }
           }
           /* At Activated Menubar */
           :root:not([chromehidden~="menubar"], [sizemode="fullscreen"])
@@ -6207,6 +6266,15 @@
               :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
                 visibility: collapse !important;
               }
+              :root[tabsintitlebar] #titlebar {
+                z-index: 1;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+                opacity: 1 !important;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+                opacity: var(--inactive-titlebar-opacity);
+              }
             }
           }
           @media screen and (max-width: 1100px) {
@@ -6362,6 +6430,15 @@
               :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
                 visibility: collapse !important;
               }
+              :root[tabsintitlebar] #titlebar {
+                z-index: 1;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+                opacity: 1 !important;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+                opacity: var(--inactive-titlebar-opacity);
+              }
             }
             /* At Activated Menubar */
             :root:not([chromehidden~="menubar"], [sizemode="fullscreen"])
@@ -6512,6 +6589,15 @@
               :root[inFullscreen]:not([macOSNativeFullscreen]) #menubar-items {
                 visibility: collapse !important;
               }
+              :root[tabsintitlebar] #titlebar {
+                z-index: 1;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive {
+                opacity: 1 !important;
+              }
+              :root[tabsintitlebar] #titlebar:-moz-window-inactive .titlebar-buttonbox {
+                opacity: var(--inactive-titlebar-opacity);
+              }
             }
             /* At Activated Menubar */
             :root:not([chromehidden~="menubar"], [sizemode="fullscreen"])
@@ -7106,6 +7192,7 @@
   .tab-background:is([selected], [multiselected]) {
     background-color: var(--tab-selected-bgcolor, var(--toolbar-bgcolor)) !important;
   }
+  #tabbrowser-arrowscrollbox > .tabbrowser-tab > .tab-stack > .tab-background[selected]:-moz-lwtheme,
   #tabbrowser-tabs:not([movingtab])
     > #tabbrowser-arrowscrollbox
     > .tabbrowser-tab
@@ -7115,8 +7202,16 @@
     */
     background-image: linear-gradient(transparent, transparent),
       linear-gradient(var(--toolbar-bgcolor), var(--toolbar-bgcolor)), var(--lwt-header-image, none) !important;
+    background-position: 0, 0, right top;
+    background-attachment: scroll, scroll, fixed;
+    background-repeat: repeat-x, repeat-x, no-repeat !important;
   }
   @supports -moz-bool-pref("userChrome.theme.transparent.frame") {
+    :root:not([lwtheme-image])
+      #tabbrowser-arrowscrollbox
+      > .tabbrowser-tab
+      > .tab-stack
+      > .tab-background[selected]:-moz-lwtheme,
     :root:not([lwtheme-image])
       #tabbrowser-tabs:not([movingtab])
       > #tabbrowser-arrowscrollbox
diff --git a/css/leptonContent.css b/css/leptonContent.css
index d51e236..8d46fb2 100644
--- a/css/leptonContent.css
+++ b/css/leptonContent.css
@@ -3576,6 +3576,13 @@
         }
       }
     }
+    @-moz-document url-prefix("about:logins") {
+      @supports -moz-bool-pref("userChrome.icon.context_menu") {
+        .menuitem-export {
+          background-image: url("../icons/toolbarButton-download.svg") !important;
+        }
+      }
+    }
   }
 }
 /** Download Panel ************************************************************/
@@ -7312,6 +7319,15 @@
     }
   }
 }
+@media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.menu") {
+  @-moz-document url-prefix("about:logins") {
+    @media (not (-moz-bool-pref: "userChrome.icon.disabled")) and (-moz-bool-pref: "userChrome.icon.menu") and (-moz-bool-pref: "userChrome.icon.context_menu") {
+      .menuitem-export {
+        background-image: url("../icons/toolbarButton-download.svg") !important;
+      }
+    }
+  }
+}
 /** Download Panel ************************************************************/
 @-moz-document url-prefix("about:downloads") {
   @media (prefers-reduced-motion: no-preference) and (-moz-bool-pref: "userChrome.decoration.download_panel") {
diff --git a/css/leptonContentESR.css b/css/leptonContentESR.css
index 3613979..1f657de 100644
--- a/css/leptonContentESR.css
+++ b/css/leptonContentESR.css
@@ -3715,6 +3715,13 @@
         }
       }
     }
+    @-moz-document url-prefix("about:logins") {
+      @supports -moz-bool-pref("userChrome.icon.context_menu") {
+        .menuitem-export {
+          background-image: url("../icons/toolbarButton-download.svg") !important;
+        }
+      }
+    }
   }
 }
 /** Download Panel ************************************************************/
diff --git a/src/compatibility/_theme.scss b/src/compatibility/_theme.scss
index 3911d6e..ef6deb3 100644
--- a/src/compatibility/_theme.scss
+++ b/src/compatibility/_theme.scss
@@ -93,10 +93,18 @@ menu {
 
 /*= Light Weight Theme =======================================================*/
 /* Header Image */
-:root[lwtheme-image] {
+:root[lwtheme-image] > body {
+  // Linux compatibility:
+  // :root[tabsintitlebar][sizemode="normal"]:not([gtktiledwindow="true"]) {
+  //    appearance: auto;
+  // }
   background-image: var(--lwt-header-image) !important; /* Original: var(--lwt-header-image) */
   background-repeat: no-repeat !important;
   background-position: right top !important;
+  background-color: var(--lwt-accent-color, Window) !important;
+  &:-moz-window-inactive {
+    background-color: var(--lwt-accent-color-inactive, var(--lwt-accent-color)) !important;
+  }
 
   // For high-resolution screen's image ratio
   @media (min-width: 2500px) {
@@ -122,6 +130,10 @@ menu {
   --lwt-tabs-border-color: rgba(0, 0, 0, 0.4);
 }
 
+#customization-container {
+  background-color: transparent !important; /* Original: color-mix(in srgb, -moz-dialog 85%, white) */
+}
+
 /*= Findbar Border Color =====================================================*/
 html|input.findbar-textbox {
   border: 1px solid var(--input-border-color, var(--toolbar-field-border-color, ThreeDShadow)) !important; /* Original: 1px solid var(--input-border-color, var(--toolbar-field-border-color)) */
diff --git a/src/contents/_context_menu.scss b/src/contents/_context_menu.scss
index aa18c87..daec5c7 100644
--- a/src/contents/_context_menu.scss
+++ b/src/contents/_context_menu.scss
@@ -25,3 +25,9 @@
     @import "../icons/addon_page";
   }
 }
+
+@include moz-document(url-prefix "about:logins") {
+  @include Option("userChrome.icon.context_menu") {
+    @import "../icons/login_page";
+  }
+}
diff --git a/src/decoration/_animate.scss b/src/decoration/_animate.scss
index a0b7cbb..8136471 100644
--- a/src/decoration/_animate.scss
+++ b/src/decoration/_animate.scss
@@ -124,12 +124,27 @@ xul|search-textbox.tabsFilter,
   }
 }
 
-/*- Full Screen ------------------------------------------------------------*/
+/*- Titlebar & Full Screen -------------------------------------------------*/
+#titlebar {
+  will-change: background-color !important;
+  transition: background-color 0.2s var(--animation-easing-function) !important;
+
+  &:-moz-window-inactive {
+    transition: background-color 0.5s var(--animation-easing-function) !important;
+  }
+}
 #navigator-toolbox {
   /* Full screen out */
-  transition: margin-top 1s ease;
+  will-change: margin-top, background-color !important;
+  transition: margin-top 1s ease,
+              background-color 0.2s var(--animation-easing-function) !important;
   transform-origin: top;
 
+  &:-moz-window-inactive {
+    transition: margin-top 1s ease,
+                background-color 0.5s var(--animation-easing-function) !important;
+  }
+
   &[inFullscreen="true"] {
     /* Full screen enter */
     animation-duration: 1s;
@@ -138,7 +153,13 @@ xul|search-textbox.tabsFilter,
 
     /* Full screen navbar not hover */
     // transition: margin-top 0.3s var(--animation-easing-function) 50ms;
-    transition: margin-top 1.3s var(--animation-easing-function) 50ms;
+    transition: margin-top 1.3s var(--animation-easing-function) 50ms,
+                background-color 0.2s var(--animation-easing-function) !important;
+    &:-moz-window-inactive {
+      transition: margin-top 1.3s var(--animation-easing-function) 50ms,
+                  background-color 0.5s var(--animation-easing-function) !important;
+    }
+
     &:hover {
     // Full screen navbar hover
     // transition-duration: 1.5s; // Not works, because !important
diff --git a/src/icons/_login_page.scss b/src/icons/_login_page.scss
new file mode 100644
index 0000000..f1f26dc
--- /dev/null
+++ b/src/icons/_login_page.scss
@@ -0,0 +1,3 @@
+.menuitem-export {
+  background-image: url("../icons/toolbarButton-download.svg") !important;
+}
diff --git a/src/tab/selected_tab/_color_like_toolbar.scss b/src/tab/selected_tab/_color_like_toolbar.scss
index 5e3e323..a8fc64f 100644
--- a/src/tab/selected_tab/_color_like_toolbar.scss
+++ b/src/tab/selected_tab/_color_like_toolbar.scss
@@ -7,6 +7,10 @@
   background-color: var(--tab-selected-bgcolor, var(--toolbar-bgcolor)) !important;
 }
 
+#tabbrowser-arrowscrollbox
+  > .tabbrowser-tab
+  > .tab-stack
+  > .tab-background[selected]:-moz-lwtheme,
 #tabbrowser-tabs:not([movingtab])
   > #tabbrowser-arrowscrollbox
   > .tabbrowser-tab
@@ -16,6 +20,9 @@
  */
   background-image: linear-gradient(transparent, transparent),
     linear-gradient(var(--toolbar-bgcolor), var(--toolbar-bgcolor)), var(--lwt-header-image, none) !important;
+  background-position: 0, 0, right top;
+  background-attachment: scroll, scroll, fixed;
+  background-repeat: repeat-x, repeat-x, no-repeat !important;
 
   @include Option("userChrome.theme.transparent.frame") {
     :root:not([lwtheme-image]) & {
diff --git a/src/tabbar/layout/_window_control.scss b/src/tabbar/layout/_window_control.scss
index bcb07fc..2c45148 100644
--- a/src/tabbar/layout/_window_control.scss
+++ b/src/tabbar/layout/_window_control.scss
@@ -54,7 +54,9 @@ See the above repository for updates as well as full license text. */
 
 @include OS($win) {
   :root[sizemode="maximized"][tabsintitlebar] {
-    --uc-titlebar-padding: 8px;
+    @if mode.isESR() {
+      --uc-titlebar-padding: 8px;
+    }
 
     #navigator-toolbox-background {
       margin-top: calc(-1 * var(--uc-titlebar-padding));
@@ -127,6 +129,16 @@ See the above repository for updates as well as full license text. */
       visibility: collapse !important;
     }
   }
+
+  :root[tabsintitlebar] #titlebar {
+    z-index: 1;
+    &:-moz-window-inactive {
+      opacity: 1 !important;
+      .titlebar-buttonbox {
+        opacity: var(--inactive-titlebar-opacity);
+      }
+    }
+  }
 }
 
 /* At Activated Menubar */
diff --git a/src/theme/system_default_theme/_gtk.scss b/src/theme/system_default_theme/_gtk.scss
index fb4ec0f..51010ef 100644
--- a/src/theme/system_default_theme/_gtk.scss
+++ b/src/theme/system_default_theme/_gtk.scss
@@ -5,4 +5,17 @@
       --urlbar-popup-url-color: #{$accentColor};
     }
   }
+
+  // #864
+  :root:not(:-moz-lwtheme) {
+    // Rollback to color
+    --toolbar-field-background-color: Field !important;
+    --toolbar-field-color: FieldText !important;
+    --toolbar-field-border-color: ThreeDShadow !important;
+
+    #urlbar-background, #searchbar {
+      // Original: light-dark(rgba(0, 0, 0, .05), rgba(0, 0, 0, .3))
+      background-color: var(--toolbar-field-background-color) !important;
+    }
+  }
 }
diff --git a/user.js b/user.js
index bb8dcc3..71f23ca 100644
--- a/user.js
+++ b/user.js
@@ -280,6 +280,14 @@ user_pref("userContent.page.dark_mode",        true); // Need proton_color
 user_pref("userContent.page.proton",           true); // Need proton_color
 
 // ** Useful Options ***********************************************************
+// Tab preview
+// https://blog.nightly.mozilla.org/2024/02/06/a-preview-of-tab-previews-these-weeks-in-firefox-issue-153/
+user_pref("browser.tabs.cardPreview.enabled",   true);
+
+// Paste suggestion at urlbar
+// https://blog.nightly.mozilla.org/2023/12/04/url-gonna-want-to-check-this-out-these-weeks-in-firefox-issue-150/
+user_pref("browser.urlbar.clipboard.featureGate", true);
+
 // Integrated calculator at urlbar
 user_pref("browser.urlbar.suggest.calculator", true);
 
@@ -290,6 +298,18 @@ user_pref("browser.urlbar.suggest.calculator", true);
 // user_pref("browser.tabs.drawInTitlebar", true);
 // user_pref("browser.tabs.inTitlebar",        1); // Nightly, 96 Above
 
+// Searchbar, Removed from settings starting with FF v122
+// user_pref("browser.search.widget.inNavBar",    true);
+
+// Firefox view search
+// https://blog.nightly.mozilla.org/2023/12/14/better-searching-in-firefox-to-close-out-2023-these-weeks-in-firefox-issue-151/
+// user_pref("browser.firefox-view.search.enabled",       true);
+// user_pref("browser.firefox-view.virtual-list.enabled", true);
+
+// Firefox screenshot
+// https://blog.nightly.mozilla.org/2024/01/22/happy-new-year-these-weeks-in-firefox-issue-152/
+// user_pref("screenshots.browser.component.enabled", true);
+
 // ** Scrolling Settings *******************************************************
 // == Only Sharpen Scrolling ===================================================
 //         Pref                                             Value      Original