If you are on Windows, an additional layer of security might be to install Sandboxie (http://sandboxie.com http://sandboxie.com) and run Firefox from within a d

If you are on Windows, an additional layer of security might be to install Sandboxie (http://sandboxie.com http://sandboxie.com) and run Firefox from within a dedicated sandbox. Additional brownie points for editing the file/folder access. (making confidential folders inaccessible/write-only)