This crash occurred while doing a update. I was also working with Netbeans IDE as well when the crash occurred. Please see attached bug report for more details.
Created attachment 309361 [details] Bug Report when crash occurred
This bug doesn't contain enough information to be dealt with. If you can reproduce it again, please file a new bug and this time don't skip all those information we ask you to fill in -- they are there for a reason. I don't even know which program crashed in this case (in case it was firefox, then this backtrace is totally useless).