Adding Firefox OS to mobile support

Hello there!

Wich is the best way to add Firefox OS support to mobile support?

I’m using WP Super Cache and Mobilepress.

I find and replace the Android rule in .htaccess to this one:
Android| –> Android|Mobile.*Firefox|

Also I did a similar change in Mobilepress:

Original Mobilepress’ check:
https://plugins.svn.www.ads-software.com/mobilepress/trunk/classes/check.php
Mine:
https://pastebin.mozilla.org/2894625

And sometimes it works… just sometimes.

So, are there any other places where we need to add Firefox OS UA in WP Super Cache?

Thank you!
EDIT:
Firefox OS UA reference:
https://developer.mozilla.org/es/docs/Gecko_user_agent_string_reference#Firefox_OS

https://www.ads-software.com/plugins/wp-super-cache/