Browser's Security Component

When I open the Firefox Portable, the following alert appeared:

Could not initialize the browser's security component. The most likely cause is problems with files in your browser's profile directory. Please check that this directory has no read/write restrictions and your hard disk is not full or close to full. It is recommended that you exit the browser and fix the problem. If you continue to used this browser session, you might see incorrect browser behavior when acessing security features.

I saw the bottow right corner of the web brower that the lock icon is not shown.

Please help anyone!