If you need to backup your Mozilla Firefo, Thunderbird, or a variety of other programs’ profiles, consider MozBackup. It’s an easy-to-use utility to backup and restore profiles — or transfer it to another computer if you don’t feel like copying and pasting. (Another great feature is the ability to choose exactly what you want to backup. Leery of keeping passwords? Uncheck it. Want everything? No prob.) And still another good thing is that the mysterious *.PVC extension they use is simply a ZIP file! If you don’t have MozBackup handy, or it doesn’t work, you can rename and extract the files.