Trouble Opening Mozilla?

Open a Unix terminal window and type

cd .mozilla/firefox

then type,

ls -a

and look for a file with an extension .default , for example xxxx.default, next type,

cd xxxx.default 

and type,

ls -a

and you should see a file named .lock and/or .parentlock further type,

rm .lock

and to any question you are asked type,

yes

and again type,

rm .parentlock

and again respond to any question by typing,

yes