filebrowser_safe is a permanent fork of FileBrowser asset manager for Django, to be referenced as a dependency for the Mezzanine CMS for Django.
At the time of filebrowser_safe's creation, FileBrowser was incorrectly packaged on PyPI, and had also dropped compatibility with Django 1.1 -- filebrowser_safe was therefore created to address these specific issues.
For further details, see Why are Grappelli and Filebrowser Forked?.
You can test your local branch against the latest mezzanine development version by running ./test.sh.