Over at PortableApps.com we just released Multiple Profile Support for Mozilla Firefox, Thunderbird, Sunbird and SeaMonkey, Portable Editions
. It makes it incredibly easy to add support for a second (or third or fourth) profile to our portable packages of Firefox, Thunderbird, Sunbird and SeaMonkey. We introduced support for this over 2 years ago but this new 1.1 update improves things a bit and is now available directly in the PortableApps.com Platform's app store for easy installation and update as well as being available for direct download. It's handy for setting up a dev profile for working on extensions or keeping multiple sets of email accounts separate. I figured some folks here would be interested as well.