Backed out changeset 9b4e057f8cd9 (bug 1647356) for causing bug 1648265. CLOSED TREE

browser/themes/shared/browser.inc.css

@@ -45,7 +45,7 @@
 /* Toolbar / content area border */
 
 #navigator-toolbox {
-  border-bottom: 0.01px solid var(--chrome-content-separator-color);
+  border-bottom: 1px solid var(--chrome-content-separator-color);
 }
 
 :root[customizing] #navigator-toolbox {

browser/themes/shared/urlbar-searchbar.inc.css

@@ -43,10 +43,7 @@
 #searchbar {
   background-color: -moz-Field;
   background-clip: padding-box;
-  /* We use 0.01px because borders are always at least one device pixel, but
-   * 1px may be more than that on higher-resolution displays, and we don't want
-   * fractional-pixel borders */
-  border: 0.01px solid @fieldBorderColor@;
+  border: 1px solid @fieldBorderColor@;
   border-radius: var(--toolbarbutton-border-radius);
   box-shadow: 0 1px 4px rgba(0,0,0,.05);
 }
@@ -164,7 +161,7 @@
 
 #urlbar-input-container {
   /* Match urlbar-background's border. */
-  border: 0.01px solid transparent;
+  border: 1px solid transparent;
 }
 
 #urlbar-container[breakout] {
@@ -722,7 +719,7 @@
   padding: 0 8px;
   border-radius: 1em;
   background-color: hsla(0,0%,0%,.05);
-  border: 0.01px solid hsla(210,4%,50%,.3);
+  border: 1px solid hsla(210,4%,50%,.3);
 }
 
 @keyframes urlbar-zoom-reset-pulse {

browser/themes/windows/browser-aero.css

@@ -291,7 +291,7 @@
     /* Artificially draw window borders that are covered by lwtheme, see bug 591930.
      * Borders for win7 are below, win10 doesn't need them. */
     #main-window[sizemode="normal"] #navigator-toolbox:-moz-lwtheme {
-      border-top: 0.01px solid @glassShadowColor@;
+      border-top: 1px solid @glassShadowColor@;
     }
   }
 
@@ -305,14 +305,14 @@
     /* Vertical toolbar border */
     #main-window[sizemode=normal] .browser-toolbar:not(.titlebar-color):not(:-moz-lwtheme),
     #main-window[sizemode=normal] .browser-toolbar:-moz-lwtheme {
-      border-inline: 0.01px solid @glassShadowColor@;
+      border-inline: 1px solid @glassShadowColor@;
       background-clip: padding-box;
     }
 
     #navigator-toolbox::after {
       content: "";
       display: -moz-box;
-      border-bottom: 0.01px solid var(--chrome-content-separator-color);
+      border-bottom: 1px solid var(--chrome-content-separator-color);
     }
 
     #navigator-toolbox,