Your Firefox profile cannot be loaded. It may be missing or inaccessible.

 

4down voteaccepted

Given you have run Firefox with sudo, and probably other programs not meant to be, you need to regain the ownership of files in your home directory so they are accessible without root permissions again. This is why you are getting the error:

Access was denied while trying to open files in your profile directory. 

If there is any output from find ~ \! -user $USER, and I'm sure there will be, you need to run the command:

sudo chown -R faezeh:faezeh ~faezeh