This is a Selenium IDE plugin for firefox. This plugin will add a functionality which will export test suites and test cases as Erlang / EUnit source. The generated code will use the erlang implementation of WebDriver. You can find it here: https://github.com/Quviq/webdrv
You need zip package installed on your system, after that just type:
make
You'll get an xpi file, now you can install it as firefox plugin!