set browser.safebrowsing.enabled to false set browser.safebrowsing.malware.enabled to false
disables collection of data for files about sites suspected of malware/phishing
clear the cache in Firefox and delete the urlclassifier*.sqlite files from your profile directory.
tarball of your profile
edit /etc/fstab
Set up a backup and restore script
empty your profile directory
run the script
run the script
adding the command to your .xinitrc
un it again before you shut down your computer
I use Ubuntu, and for me some of the steps above had to be changed a little. For example, my FF profile was much bigger because of the many extensions i have installed, so i change the partition size to 200, so you can change the size to your needs as well.
How to dual boot Ubuntu and Windows XP without changing the Windows MBR
I use this setup to boot ubuntu from the third partition of my second hard drive. As ubuntu is on a second drive I haven't made any changes to my Windows partition at all! Risk free.