I must remind you that all extensions for 3rd party components are provided without support!
It was my good will to create extension for FireBoard and release it for free, and I state in the readme file it is provided as-is, with no support provided.
Don't confuse support for SEF Advance with support for 3rd party component extensions please, that's two different things.
Now, I will have a look at this bug on the extension but only if and when I have time. If you can't wait then simple delete the extension and FireBoard will work without SEF Advance URLs.