Being powered by Ubuntu’s Linux kernel 3.16.0-50 and 3.19.0-30 packages, the first and last Release Candidate (RC) build of Black Lab Linux 7, due for release later this year, comes today with the latest software versions, including Mozilla Firefox 41.0, LibreOffice 5.0.2.2, Mozilla Thunderbird 38.2.0, and Audacious 3.6.2.