This extension adds support for the U2F specification with Yubico devices to Firefox.

It can be used by accessing window.u2f object from content pages.

Install from https://addons.mozilla.org/firefox/addon/u2f-support-add-on/

1. cd c_src
2. cmake
3. make && make install
4. cd ../ext
5. jpm run

On OS X the u2f binary may lose its executable bit upon packaging as an XPI.