--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -2116,17 +2116,17 @@ pref("layout.css.ruby.enabled", false);
 
 // Is support for CSS box-decoration-break enabled?
 pref("layout.css.box-decoration-break.enabled", true);
 
 // Is layout of CSS outline-style:auto enabled?
 pref("layout.css.outline-style-auto.enabled", false);
 
 // Is CSSOM-View scroll-behavior and its MSD smooth scrolling enabled?
-pref("layout.css.scroll-behavior.enabled", false);
+pref("layout.css.scroll-behavior.enabled", true);
 
 // Is the CSSOM-View scroll-behavior CSS property enabled?
 pref("layout.css.scroll-behavior.property-enabled", false);
 
 // Tuning of the smooth scroll motion used by CSSOM-View scroll-behavior.
 // Spring-constant controls the strength of the simulated MSD
 // (Mass-Spring-Damper)
 pref("layout.css.scroll-behavior.spring-constant", "250.0");
@@ -3293,16 +3293,19 @@ pref("print.print_reversed", false);
 pref("print.print_color", true);
 pref("print.print_landscape", false);
 pref("print.print_paper_size", 0);
 
 // print_extra_margin enables platforms to specify an extra gap or margin
 // around the content of the page for Print Preview only
 pref("print.print_extra_margin", 0); // twips
 
+// CSSOM-View scroll-behavior smooth scrolling requires the C++ APZC
+pref("layout.css.scroll-behavior.enabled", false);
+
 # ANDROID
 #endif
 
 #if defined(ANDROID) || defined(FXOS_SIMULATOR)
 // font names
 
 pref("font.alias-list", "sans,sans-serif,serif,monospace");