This update for MozillaFirefox, mozilla-nss fixes the following issues:

Changes in MozillaFirefox:
- Mozilla Firefox 48.0.1:
* Fixed an audio regression impacting some major websites (bmo#1295296)
* Fix a top crash in the JavaScript engine (bmo#1290469)
* Fix a startup crash issue caused by Websense (bmo#1291738)
* Fix a different behavior with e10s / non-e10s on and mouse events (bmo#1291078)
* Fix a top crash caused by plugin issues (bmo#1264530)
* Fix a shutdown issue (bmo#1276920)
* Fix a crash in WebRTC

- added upstream patch so system plugins/extensions are correctly loaded again on x86-64 (bmo#1282843)

- CVE-2016-6354: Fix for possible buffer overrun (boo#990856)

Changes in mozilla-nss:
- also sign libfreeblpriv3.so to allow FIPS mode again (boo#992236)