mozdev.org was a website that offered free project hosting, and software development tools to the Mozilla community.

Site hosted extensions for Firefox, Thunderbird and SeaMonkey and stand-alone Mozilla-based applications.

It was free to set up a project there, but all development must have been done using a license approved by the OSI.

According to the site, at one point it hosted over 250 active projects.

It was shut down in July 2020 and currently redirects to mozilla.org.