It's quite normal for Firefox to be sucking up over 200MB of memory right off the bat. Firemin can decrease Firefox's memory usage to as low as 10MB and stop your computer from running out of memory.
Firefox Password by Thegrideon Software is advanced password recovery and decryption tool for Mozilla Firefox. Firefox Password allows you to recover Master Password and logins and passwords saved in Firefox cache (signons.sqlite database).
FireFox Password recovers FireFox Master Password and saved login passwords. FireFox Password displays all the login information stored by FireFox. For each item, the URL, login name and password will be displayed. Only saved passwords will be shown.