[SOLVED] Mozilla Firefox not working

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http://forums.fedoraforum.org – I really don't know what happened to my Firefox browser. I was using it till yesterday but now it is not working(doesn't open up at all). I restarted my computer, re installed Firefox using yum and it went okay, but that also is making no difference. I tried running it from the terminal this is what i got: Quote: [rhnblk@RhnBlk bin]$ firefox /usr/lib/firefox/firefox: symbol lookup error: /usr/lib/xulrunner/libxul.so: undefined symbol: PR_SetCurrentThreadName rpm -q gives this Quote: rpm -q firefox firefox-16.0. (HowTos)