Home page: http://www.firebreath.org

FireBreath is a cross-platform browser plugin framework. It supports ActiveX and NPAPI on Windows, Mac OS X, and Linux (probably other unix-derivitives as well).

After checking out the source, make sure you run:

git submodule update --init --recursive

in the project root to get the linked repositories. The main one you want is the firebreath-boost repository. You don't need firebreath-boost if you use WITH_SYSTEM_BOOST.

If you choose to use subversion to check out FireBreath, make sure you also check out the firebreath-boost project as src/3rdParty/boost/ (you'll have to remove the existing directory).

Good luck!