diff --git a/debian/browser.install.in b/debian/browser.install.in
index 085ce4d710..6e42c176e9 100644
--- a/debian/browser.install.in
+++ b/debian/browser.install.in
@@ -72,3 +72,5 @@ usr/lib/@browser@/v4l2test
 usr/lib/@browser@/vaapitest
 
 debian/@browser@-symbolic.svg usr/share/icons/hicolor/symbolic/apps
+
+debian/local/pref/*.js etc/@browser@
diff --git a/debian/rules b/debian/rules
index 8efd4e6fd4..0590f204bc 100755
--- a/debian/rules
+++ b/debian/rules
@@ -163,7 +163,7 @@ RUSTFLAGS = --remap-path-prefix=$(CURDIR)=.
 EXPORTS := CC CXX CFLAGS CXXFLAGS CPPFLAGS LDFLAGS MOZILLA_OFFICIAL RUSTFLAGS
 $(call lazy,CONFIGURE_ENV,$$(foreach export,$(EXPORTS),$$(export)="$$($$(export))"))
 
-IN_FILES := $(wildcard debian/*.in)
+IN_FILES := $(wildcard debian/*.in debian/local/pref/*.in)
 ifeq ($(PRODUCT_NAME),firefox)
 IN_FILES := $(filter-out debian/browser.preinst.in debian/browser.postrm.in debian/$($(PRODUCT)).in,$(IN_FILES))
 endif
@@ -310,6 +310,8 @@ stamps/dh_install:: debian/noinstall debian/$($(PRODUCT))-symbolic.svg
 	dh_missing --fail-missing
 
 override_dh_install-arch: stamps/dh_install
+	sed -i -e 's|user_pref(|pref(|g' debian/$($(PRODUCT))/etc/$($(PRODUCT))/*.js
+
 override_dh_install-indep: stamps/dh_install-l10n
 
 # dwz trips on libxul, after using a lot of memory.