diff --git a/toolkit/themes/shared/design-system/dist/tokens-shared.css b/toolkit/themes/shared/design-system/dist/tokens-shared.css
index 94c61190db0e9b0df19249eb4e49a24ba1a61792..ab5a0cb7028e10a5ecce1d4034b450d04984db8a 100644
--- a/toolkit/themes/shared/design-system/dist/tokens-shared.css
+++ b/toolkit/themes/shared/design-system/dist/tokens-shared.css
@@ -7,6 +7,8 @@
 
 @layer tokens-foundation, tokens-foundation-nova, tokens-prefers-contrast, tokens-prefers-contrast-nova, tokens-forced-colors, tokens-forced-colors-nova;
 
+@import url("chrome://browser/content/zen-styles/zen-theme.css");
+
 @layer tokens-foundation {
   :root,
   :host(.anonymous-content-host) {
