diff --git a/libproxy.spec b/libproxy.spec
index 401b036..042a04c 100644
--- a/libproxy.spec
+++ b/libproxy.spec
@@ -4,7 +4,7 @@
 
 Name:           libproxy
 Version:        0.4.15
-Release:        26%{?dist}
+Release:        27%{?dist}
 Summary:        A library handling all the details of proxy configuration
 
 License:        LGPLv2+
@@ -39,8 +39,6 @@ BuildRequires:  libmodman-devel >= 2.0.1
 %if ! 0%{?bootstrap}
 # gnome
 BuildRequires:  pkgconfig(gio-2.0) >= 2.26
-# mozjs
-BuildRequires:  pkgconfig(mozjs-68)
 # NetworkManager
 BuildRequires:  pkgconfig(libnm)
 # pacrunner (and NetworkManager)
@@ -106,14 +104,6 @@ Requires:       /usr/bin/kreadconfig5
 %description    kde
 The %{name}-kde package contains the %{name} plugin for kde.
 
-%package        mozjs
-Summary:        Plugin for %{name} and mozjs
-Requires:       %{name}%{?_isa} = %{version}-%{release}
-Provides:       %{name}-pac = %{version}-%{release}
-
-%description    mozjs
-The %{name}-mozjs package contains the %{name} plugin for mozjs.
-
 %package        networkmanager
 Summary:        Plugin for %{name} and networkmanager
 Requires:       %{name}%{?_isa} = %{version}-%{release}
@@ -126,6 +116,7 @@ for networkmanager.
 Summary:        Plugin for %{name} and webkitgtk3
 Requires:       %{name}%{?_isa} = %{version}-%{release}
 Provides:       %{name}-pac = %{version}-%{release}
+Obsoletes:      %{name}-mozjs <= %{version}-%{release}
 
 %description    webkitgtk4
 The %{name}-webkitgtk4 package contains the %{name} plugin for
@@ -159,13 +150,14 @@ developing applications that use %{name}.
 export CXXFLAGS="-std=c++14 $RPM_OPT_FLAGS"
 %{cmake} \
   -DMODULE_INSTALL_DIR=%{_libdir}/%{name}/%{version}/modules \
+  -DBIPR=OFF \
   -DWITH_PERL=OFF \
 %if ! 0%{?bootstrap}
   -DWITH_GNOME3=ON \
   -DWITH_PYTHON2=OFF \
   -DWITH_PYTHON3=ON \
   -DWITH_WEBKIT3=ON \
-  -DWITH_MOZJS=ON \
+  -DWITH_MOZJS=OFF \
 %else
   -DWITH_PYTHON2=OFF \
   -DWITH_PYTHON3=OFF \
@@ -214,9 +206,6 @@ install -Dpm 0644 %{SOURCE1} %{buildroot}/%{_mandir}/man1/proxy.1
 %files kde
 %{_libdir}/%{name}/%{version}/modules/config_kde.so
 
-%files mozjs
-%{_libdir}/%{name}/%{version}/modules/pacrunner_mozjs.so
-
 %files networkmanager
 %{_libdir}/%{name}/%{version}/modules/network_networkmanager.so
 
@@ -235,6 +224,9 @@ install -Dpm 0644 %{SOURCE1} %{buildroot}/%{_mandir}/man1/proxy.1
 
 
 %changelog
+* Tue Oct 06 2020 Frantisek Zatloukal <fzatlouk@redhat.com> - 0.4.15-27
+- Disable mozjs backend by default, obsolete it by webkit subpackage
+
 * Tue Sep 29 2020 David King <amigadave@amigadave.com> - 0.4.15-26
 - Fix PAC buffer overflow (#1883584)