So as @Sancus mentioned, the reason for the different URL endpoint compared to the others is basically cause that is what has been set-up on Gaia. Also just to be clear, the URL will also not just be mozilla.org/firefox-os but, will be mozilla.org/privacy/firefox-os however, I agree things should be more uniform and if we can setup a redirect quickly, I do not see a problem with this.

I know that at the moment this is a Gaia P1 and a TEF+ blocker so it needs to move fast. Let me know your thoughts on this and I will make the required change.