diff --git a/userChrome.css b/userChrome.css
index a8c9694..83f4092 100644
--- a/userChrome.css
+++ b/userChrome.css
@@ -900,6 +900,12 @@
     background-color: rgba(255,255,255,.2) !important;
   }
 
+  /* Prevent identitiy color flashing */
+  .tabbrowser-tab[usercontextid] .tab-context-line {
+    --identity-icon-color: none;
+  }
+
+  /* Animation */
   .tabbrowser-tab:not([selected="true"], [multiselected]) .tab-context-line {
     opacity: 0 !important;
     transform: scaleX(0) !important;