Mozilla Thunderbird®, Portable Edition 59.0 Beta 1 has been released. It's the popular Mozilla Thunderbird email client bundled with a PortableApps.com launcher as a portable app. This package allows you to test the upcoming version without impacting your standard portable or local install of Thunderbird. Note that the current beta is English only. It's packaged in PortableApps.com Format so it can easily integrate with the PortableApps.com Platform. And it's open source and completely free.
Mozilla®, Thunderbird® and the Thunderbird logo are registered trademarks of the Mozilla Foundation and are used under license.