web/message_bar.css

@@ -139,8 +139,6 @@
   --undo-button-bg-color-hover: rgb(21 20 26 / 0.14);
   --undo-button-bg-color-active: rgb(21 20 26 / 0.21);
 
-  --undo-button-border: 1px solid #0060df;
-
   --undo-button-fg-color: var(--message-bar-fg-color);
   --undo-button-fg-color-hover: var(--undo-button-fg-color);
   --undo-button-fg-color-active: var(--undo-button-fg-color);
@@ -155,8 +153,6 @@
     --undo-button-bg-color: rgb(255 255 255 / 0.08);
     --undo-button-bg-color-hover: rgb(255 255 255 / 0.14);
     --undo-button-bg-color-active: rgb(255 255 255 / 0.21);
-
-    --undo-button-border: 1px solid #0df;
   }
 
   @media screen and (forced-colors: active) {
@@ -173,8 +169,6 @@
     --undo-button-fg-color: ButtonFace;
     --undo-button-fg-color-hover: SelectedItemText;
     --undo-button-fg-color-active: SelectedItemText;
-
-    --undo-button-border: none;
   }
 
   position: fixed;
@@ -200,7 +194,7 @@
     font-weight: 590;
     line-height: 19.5px;
     color: var(--undo-button-fg-color);
-    border: var(--undo-button-border);
+    border: none;
     padding: 4px 16px;
     margin-inline-start: 8px;
     height: 32px;