Rated 4 out of 5 stars

Nice, but should not rely on fireclam to filter out some extension, pdf of not. The addons itself should have its own mechanism to filter by extension and/or by filetype, fireclam rely on the return code of clamscan, which cause some error message at times, and finally while scanning firefox is not responsive which is very annoying.

BUT since it's the only extension that can use amavis correctly this is a must have for concerned linux User.

BTW for those wanting to filter any kind of content in the module parameters, add this:
--exclude=".*\.((pdf)|(txt))" to exclude scan for pdf or text files, you can add whatever extension you need not scanned this way.

This review is for a previous version of the add-on (0.8.1-signed).