Solution if your FB app crashing.....

If you guys are facing this problem (I faced also).Here u go.Install FB app let it run and crash first time.Then use any root explorer and go to: /data/data/com.facebook.katana/lib-xzs/ then you see the file 'libsslx.so'. Remove this file and facebook work.
Thanx to the dude who give the solution in RR (Marshmallow) thread.

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