diff --git a/browser/components/urlbar/UrlbarInput.jsm b/browser/components/urlbar/UrlbarInput.jsm
--- a/browser/components/urlbar/UrlbarInput.jsm
+++ b/browser/components/urlbar/UrlbarInput.jsm
@@ -1699,23 +1699,23 @@ class UrlbarInput {
       this.removeAttribute("breakout-extend-disabled");
     }
 
     this._toolbar.setAttribute("urlbar-exceeds-toolbar-bounds", "true");
     this.setAttribute("breakout-extend", "true");
 
     // Enable the animation only after the first extend call to ensure it
     // doesn't run when opening a new window.
-    if (!this.hasAttribute("breakout-extend-animate")) {
-      this.window.promiseDocumentFlushed(() => {
-        this.window.requestAnimationFrame(() => {
-          this.setAttribute("breakout-extend-animate", "true");
-        });
-      });
-    }
+//    if (!this.hasAttribute("breakout-extend-animate")) {
+//      this.window.promiseDocumentFlushed(() => {
+//        this.window.requestAnimationFrame(() => {
+//          this.setAttribute("breakout-extend-animate", "true");
+//        });
+//      });
+//    }
   }
 
   endLayoutExtend() {
     // If reduce motion is enabled, we want to collapse the Urlbar here so the
     // user sees only sees two states: not expanded, and expanded with the view
     // open.
     if (!this.hasAttribute("breakout-extend") || this.view.isOpen) {
       return;
diff --git a/browser/themes/shared/urlbar-searchbar.inc.css b/browser/themes/shared/urlbar-searchbar.inc.css
--- a/browser/themes/shared/urlbar-searchbar.inc.css
+++ b/browser/themes/shared/urlbar-searchbar.inc.css
@@ -1,16 +1,16 @@
 %if 0
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 %endif
 
 %define fieldHoverBorderColor hsla(240,5%,5%,.35)
-%define urlbarMarginInline 5px
+%define urlbarMarginInline 0px
 %define urlbarSearchButtonWidth calc(16px + 2 * var(--urlbar-icon-padding))
 
 :root {
   --toolbar-field-border-color: hsla(240,5%,5%,.25);
 }
 
 @media not (-moz-proton) {
 :root {
@@ -268,50 +268,50 @@
 #urlbar[breakout][breakout-extend-disabled][open] {
   /* The z-index needs to be big enough to trump other positioned UI pieces
      that we want to overlay. 3 is used in the tab bar. */
   z-index: 3;
   height: auto;
 }
 
 #urlbar[breakout][breakout-extend] {
-  top: -@urlbarBreakoutExtend@;
-  left: calc(-@urlbarMarginInline@ - @urlbarBreakoutExtend@);
-  width: calc(100% + 2 * @urlbarMarginInline@ + 2 * @urlbarBreakoutExtend@);
+  top: 0;
+  left: 0;
+  width: 100%;
 }
 
 @media (-moz-proton) {
 #urlbar[breakout][breakout-extend] {
   top: 0;
-  left: -@urlbarMarginInline@;
-  width: calc(100% + 2 * @urlbarMarginInline@);
+  left: 0;
+  width: 100%;
 }
 } /*** END proton ***/
 
 @media not (-moz-proton) {
 #urlbar[breakout][breakout-extend] > #urlbar-background {
-  box-shadow: 0 3px 8px 0 rgba(0,0,0,.15)
+  box-shadow: 0 1px 4px rgba(0,0,0,.05);
 }
 
 #urlbar[breakout][breakout-extend][open] > #urlbar-background {
-  box-shadow: 0 5px 18px rgba(0,0,0,.2);
+  box-shadow: 0 1px 4px rgba(0,0,0,.05);
 }
 } /*** END !proton ***/
 
 #urlbar[breakout][breakout-extend] > #urlbar-input-container {
-  height: calc(var(--urlbar-toolbar-height) + 2 * @urlbarBreakoutExtend@);
-  padding-block: calc(@urlbarBreakoutExtend@ + (var(--urlbar-toolbar-height) - var(--urlbar-height)) / 2);
-  padding-inline: calc(@urlbarMarginInline@ + @urlbarBreakoutExtend@);
+  height: var(--urlbar-toolbar-height);
+  padding-block: 0;
+  padding-inline: 0;
 }
 
 @media (-moz-proton) {
 #urlbar[breakout][breakout-extend] > #urlbar-input-container {
   height: var(--urlbar-toolbar-height);
-  padding-block: calc((var(--urlbar-toolbar-height) - var(--urlbar-height)) / 2 + var(--urlbar-container-padding));
-  padding-inline: calc(@urlbarMarginInline@ + var(--urlbar-container-padding));
+  padding-block: 0;
+  padding-inline: 0;
 }
 } /*** END proton ***/
 
 #urlbar.searchButton[breakout][breakout-extend] > #urlbar-input-container > #urlbar-search-button {
   fill: currentColor;
   fill-opacity: .6;
 }
 
@@ -320,17 +320,17 @@
     transform: scaleX(.99) scaleY(.95);
   }
   100% {
     transform: scale(1.0);
   }
 }
 
 #urlbar[breakout][breakout-extend] > #urlbar-background {
-  animation-name: urlbar-grow;
+  animation-name: none;
   animation-duration: 0s;
   animation-timing-function: var(--animation-easing-function);
 }
 
 @media (prefers-reduced-motion: no-preference) {
   #urlbar[breakout][breakout-extend][breakout-extend-animate] > #urlbar-background {
     animation-duration: 150ms;
   }
diff --git a/browser/themes/shared/urlbarView.inc.css b/browser/themes/shared/urlbarView.inc.css
--- a/browser/themes/shared/urlbarView.inc.css
+++ b/browser/themes/shared/urlbarView.inc.css
@@ -82,26 +82,26 @@
 
 .urlbarView {
   /* Don't handle window drag events in case we are overlapping a toolbar */
   -moz-window-dragging: no-drag;
 
   display: block;
   text-shadow: none;
   overflow: clip;
-  margin-inline: calc(5px + var(--urlbar-container-padding));
-  width: calc(100% - 2 * (5px + var(--urlbar-container-padding)));
+  margin-inline: 0;
+  width: 100%
   /* Match urlbar-background's border. */
   border-inline: 1px solid transparent;
 }
 
 @media not (-moz-proton) {
 .urlbarView {
-  margin-inline: calc(4px + var(--identity-box-margin-inline));
-  width: calc(100% - 2 * (4px + var(--identity-box-margin-inline)));
+  margin-inline: 0;
+  width: 100%;
 }
 /* If the view is open, offset the toolbar overlap so the view's top border
    aligns with the toolbar. */
 #urlbar[open] > .urlbarView {
   margin-block-start: -@urlbarBreakoutExtend@;
 }
 } /*** END !proton ***/
 
@@ -123,27 +123,27 @@
   padding-block: 0;
 }
 
 .urlbarView-row {
   display: flex;
   flex-wrap: nowrap;
   fill: currentColor;
   fill-opacity: .6;
-  padding-block: 3px;
+  padding-block: 0px;
 }
 
 :root[uidensity=compact] .urlbarView-row {
   padding-block: 2px;
 }
 
 @media (-moz-proton) {
 :root:not([uidensity=compact]) .urlbarView-row:not([type=tip], [type=dynamic]) {
-  min-height: 32px;
-  padding-block: 4px;
+  min-height: 0px; /* todo: check this */
+  padding-block: 0px;
 }
 } /*** END proton ***/
 
 .urlbarView-row-inner {
   display: flex;
   flex-wrap: nowrap;
   flex-grow: 1;
   flex-shrink: 1;
@@ -288,16 +288,17 @@
   width: @urlbarViewFaviconWidth@;
   height: @urlbarViewFaviconWidth@;
   margin-inline-end: calc(@urlbarViewIconMarginEnd@);
   background-repeat: no-repeat;
   background-size: contain;
   object-fit: contain;
   flex-shrink: 0;
   -moz-context-properties: fill, fill-opacity;
+  margin-inline-start: 20px;
 }
 
 @media not (-moz-proton) {
 .urlbarView-favicon {
   /* 2px is from identity-block.inc.css */
   margin-inline-end: calc(var(--urlbar-icon-padding) / 2 + var(--identity-box-margin-inline) + 2px);
 }
 } /*** END !proton ***/
@@ -321,20 +322,20 @@
   color: var(--urlbar-popup-url-color);
   -moz-context-properties: fill;
 }
 
 /* Type icon */
 
 .urlbarView-type-icon {
   position: absolute;
-  width: 12px;
-  height: 12px;
-  margin-bottom: -4px;
-  margin-inline-start: 8px;
+  width: 16px;
+  height: 16px;;
+  margin-bottom: 0;
+  margin-inline-start: 0;
   align-self: end;
   background-repeat: no-repeat;
   background-size: contain;
   -moz-context-properties: fill, stroke;
 }
 
 /* Favicon badges have this priority: pinned > bookmark. */