diff --git a/mail/base/content/tabmail.css b/mail/base/content/tabmail.css
index a182216e0d..e06eb43431 100644
--- a/mail/base/content/tabmail.css
+++ b/mail/base/content/tabmail.css
@@ -35,11 +35,11 @@
 }
 
 .tab-label-container[textoverflow] {
-  mask-image: linear-gradient(to left, transparent, black 1em);
+  mask-image: linear-gradient(to left, transparent, black 2em);
 }
 
 .tab-label-container[textoverflow]:-moz-locale-dir(rtl) {
-  mask-image: linear-gradient(to right, transparent, black 1em);
+  mask-image: linear-gradient(to right, transparent, black 2em);
 }
 
 .tab-label {
diff --git a/mail/themes/shared/mail/tabmail.css b/mail/themes/shared/mail/tabmail.css
index 237a330671..d4917bce28 100644
--- a/mail/themes/shared/mail/tabmail.css
+++ b/mail/themes/shared/mail/tabmail.css
@@ -85,7 +85,7 @@
 }
 
 .tab-content > .tab-close-button {
-  margin-inline-start: 2px;
+  margin-inline-start: 1px;
   margin-inline-end: -2px;
   padding: 0;
 }