--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -2549,19 +2549,16 @@ pref("layout.css.unprefixing-service.glo
 pref("layout.css.scope-pseudo.enabled", true);
 
 // Is support for background-blend-mode enabled?
 pref("layout.css.background-blend-mode.enabled", true);
 
 // Is support for background-clip:text enabled?
 pref("layout.css.background-clip-text.enabled", true);
 
-// Is support for CSS vertical text enabled?
-pref("layout.css.vertical-text.enabled", true);
-
 // Is support for CSS text-combine-upright (tate-chu-yoko) enabled?
 pref("layout.css.text-combine-upright.enabled", true);
 // Is support for CSS text-combine-upright: digits 2-4 enabled?
 pref("layout.css.text-combine-upright-digits.enabled", false);
 
 // Is support for object-fit and object-position enabled?
 pref("layout.css.object-fit-and-position.enabled", true);