Usable on SeaMonkey later than 2.1 Rated 4 out of 5 stars
The install.rdf version information for SeaMonkey in this extension is seriously out-of-date, but I just edited it to bump it from 2.1b1 to 2.9.*, rezipped it as a .xpi file and successfully installed it in SeaMonkey 2.6.1, as I've been doing for more than a year. It appears to function OK with a trial export of the passwords in both XML and CSV file formats. If you're a SeaMonkey user, right-click on the "Add to SeaMonkey" button and save the file locally so you can unzip it and doctor it with a text editor such as Notepad or gedit. The developer was nice enough to clearly comment the sections in install.rdf to easily identify the appropriate one for SeaMonkey. Since SeaMonkey changed the database format in release 2, it's this tool or nothing for backing up and restoring restored passwords, as far as I know. I'd have given it 5 stars if the install.rdf file had been current for SeaMonkey.
Even if this tool were to stop working for password import, it is extremely useful to be able to save URLs and passwords to a human-readable format such as CSV and store a backup or print them out, in case the worst happens.