fix loading plugins

firefox.spec

@@ -52,6 +52,7 @@ Patch34:	xulrunner_nojit.patch
 Patch35:	firefox-37-build-with-time-independent-uuids.patch
 Patch36:	firefox-38.0-enable-NTLMv1.patch
 Patch42:	mozilla-42.0-libproxy.patch
+Patch44:	mozilla-1282843.patch
 
 # Fedora specific patches
 # Unable to install addons from https pages
@@ -178,6 +179,7 @@ Files and macros mainly for building Firefox extensions.
 %patch35 -p1
 %patch36 -p1
 #patch42 -p1
+%patch44 -p1
 
 # Fedora patches
 %patch204 -p2 -b .966424
@@ -206,6 +208,7 @@ ac_add_options --host=%{_host}
 ac_add_options --target=%{_target_platform}
 ac_add_options --enable-optimize
 ac_add_options --prefix="%{_prefix}"
+ac_add_options --libdir="%{_libdir}"
 ac_add_options --with-system-nspr
 ac_add_options --with-system-nss
 ac_add_options --with-system-zlib

mozilla-1282843.patch

@@ -0,0 +1,24 @@
+Add ability to specify system paths to @old_configure_options
+
+--- a/build/moz.configure/old.configure	2016-07-04 12:03:37.503301144 -0400
++++ b/build/moz.configure/old.configure	2016-07-04 12:04:33.443147224 -0400
+@@ -149,16 +149,19 @@
+     def all_options(help):
+         return list(options)
+ 
+     return depends(prepare_configure, extra_old_configure_args, all_options,
+                    *options)
+ 
+ 
+ @old_configure_options(
++    '--libdir',
++    '--includedir',
++    '--datadir',
+     '--cache-file',
+     '--enable-accessibility',
+     '--enable-address-sanitizer',
+     '--enable-alsa',
+     '--enable-android-omx',
+     '--enable-android-resource-constrained',
+     '--enable-approximate-location',
+     '--enable-b2g-bt',