diff --git a/packages/tailwindcss/preflight.css b/packages/tailwindcss/preflight.css
index 04e87905c..396622d28 100644
--- a/packages/tailwindcss/preflight.css
+++ b/packages/tailwindcss/preflight.css
@@ -171,6 +171,16 @@ table {
   border-collapse: collapse; /* 3 */
 }
 
+/*
+  Ensure table captions inside visually hidden tables are properly clipped in Firefox.
+  (https://github.com/tailwindlabs/tailwindcss/issues/20510)
+*/
+
+:where(table.sr-only, .sr-only > table) > caption {
+  clip-path: inherit;
+  overflow: hidden;
+}
+
 /*
   Use the modern Firefox focus style for all focusable elements.
 */