--- a/browser/themes/shared/incontentprefs-old/preferences.inc.css
+++ b/browser/themes/shared/incontentprefs-old/preferences.inc.css
@@ -381,17 +381,17 @@ description > html|a {
  * Sync
  */
 
 #fxaProfileImage {
   max-width: 60px;
   border-radius: 50%;
   list-style-image: url(chrome://browser/skin/fxa/default-avatar.svg);
   margin-inline-end: 15px;
-  image-rendering: -moz-crisp-edges;
+  image-rendering: auto;
   border: 1px solid transparent;
 }
 
 #fxaLoginStatus[hasName] #fxaProfileImage {
   max-width: 80px;
 }
 
 #fxaProfileImage.actionable {

--- a/browser/themes/shared/incontentprefs/preferences.inc.css
+++ b/browser/themes/shared/incontentprefs/preferences.inc.css
@@ -413,17 +413,17 @@ groupbox {
  * Sync
  */
 
 #fxaProfileImage {
   max-width: 60px;
   border-radius: 50%;
   list-style-image: url(chrome://browser/skin/fxa/default-avatar.svg);
   margin-inline-end: 15px;
-  image-rendering: -moz-crisp-edges;
+  image-rendering: auto;
   border: 1px solid transparent;
 }
 
 #fxaLoginStatus[hasName] #fxaProfileImage {
   max-width: 80px;
 }
 
 #fxaProfileImage.actionable {