There will also be special builds of Beta and Release without this limitation - you won't need to use Developer or Nightly.
1) Firefox without DRM, without lockdown
2) Firefox without DRM, with lockdown
3) Firefox with DRM, without lockdown
4) Firefox with DRM, with lockdown
...for every language?
In any case, if the specific combination of features you want is missing, the option to build from source is always there. (At least on Linux, building Firefox is also pretty easy.)
However, "without lockdown" is going to be an "unbranded browser."
So likely you will see two folders, something like this:
/browser/release/
1) Browser with DRM (no lockdown)
2) Browser without DRM (no lockdown)
/firefox/release/
1) Firefox without DRM
2) Firefox with DRM