diff --git a/package/public/nspr/nspr.desc b/package/public/nspr/nspr.desc
index 2cd0cb6f5..1f285f6c3 100644
--- a/package/public/nspr/nspr.desc
+++ b/package/public/nspr/nspr.desc
@@ -41,6 +41,7 @@
 [M] The ROCK Linux Project
 
 [C] extra/development
+[F] CORE
 
 [L] MPL
 [S] Stable
diff --git a/package/x11/firefox/firefox.conf b/package/x11/firefox/firefox.conf
index adb96a875..439c7de89 100644
--- a/package/x11/firefox/firefox.conf
+++ b/package/x11/firefox/firefox.conf
@@ -30,6 +30,12 @@ var_append extraconfopt " " '--enable-canvas'
 var_append extraconfopt " " '--enable-mathml'
 var_append extraconfopt " " '--enable-svg'
 
+pkginstalled libjpeg && var_append extraconfopt " " '--with-system-jpeg'
+pkginstalled zlib && var_append extraconfopt " " '--with-system-zlib'
+pkginstalled libpng && var_append extraconfopt " " '--with-system-png'
+pkginstalled nspr && var_append extraconfopt ' ' '--with-system-nspr --with-system-nss'
+
+pkginstalled pango && var_append extraconfopt ' ' '--enable-pango'
 pkginstalled cairo && var_append extraconfopt " " '--enable-system-cairo'
 
 # We need to recreate configure after gnome-linkage.patch is applied.