diff --git a/web/packages/hovercards/src/style.scss b/web/packages/hovercards/src/style.scss
index 6a3328b..9bc7d45 100644
--- a/web/packages/hovercards/src/style.scss
+++ b/web/packages/hovercards/src/style.scss
@@ -151,11 +151,11 @@ $font-sf-pro: "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Robo
 	}
 
 	.gravatar-hovercard__profile-url {
-		// webkit-box used by ellipsis mixin
-		// doesn't work well for URLs on Firefox
-		overflow: hidden;
-		text-overflow: ellipsis;
-		white-space: nowrap;
+
+		@include ellipsis(1);
+
+		/* Ensure consistent word-breaking across browsers. */
+		word-break: break-all;
 		color: $color-gray;
 	}