--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -7708,17 +7708,17 @@
           <xul:spacer flex="1"/>
           <xul:hbox class="tab-bottom-line"/>
         </xul:vbox>
         <xul:hbox xbl:inherits="pinned,bursting,notselectedsinceload"
                   anonid="tab-loading-burst"
                   class="tab-loading-burst"/>
         <xul:hbox xbl:inherits="pinned,selected=visuallyselected,titlechanged,attention"
                   class="tab-content" align="center">
-          <xul:hbox xbl:inherits="fadein,pinned,busy,progress,selected=visuallyselected,notselectedsinceload"
+          <xul:hbox xbl:inherits="fadein,pinned,busy,progress,selected=visuallyselected"
                     anonid="tab-throbber"
                     class="tab-throbber"
                     layer="true"/>
           <xul:image xbl:inherits="src=image,loadingprincipal=iconLoadingPrincipal,requestcontextid,fadein,pinned,selected=visuallyselected,busy,crashed,sharing"
                      anonid="tab-icon-image"
                      class="tab-icon-image"
                      validate="never"
                      role="presentation"/>

--- a/browser/themes/shared/tabs.inc.css
+++ b/browser/themes/shared/tabs.inc.css
@@ -176,17 +176,17 @@ tabbrowser {
 @keyframes tab-throbber-animation {
   100% { transform: translateX(-100%); }
 }
 
 @keyframes tab-throbber-animation-rtl {
   100% { transform: translateX(100%); }
 }
 
-:root[sessionrestored] .tab-throbber[progress]:not([notselectedsinceload])::before {
+:root[sessionrestored] .tab-throbber[progress]::before {
   fill: var(--tab-loading-fill);
   opacity: 1;
 }
 
 #TabsToolbar[brighttext] .tabbrowser-tab:not([visuallyselected=true]) {
   --tab-loading-fill: #fff;
 }