I'm not intentionally blocking it, it's just multiple changes are not compatible with them.
... Less than a year ago, when
r3dfox was in the lower 1
40s, Firefox langpacks were fully compatible with it, leaving only the "
redfox configurations" part of "about:preferences" untranslated (remaining in
en-US); then, the "LibreWolf-ification" of r3dfox started gradually to take place, and that part was a
conscious/intentional change;
LibreWolf itself has become incompatible with upstream Firefox, to the point that LW now has to supply its own langpacks for i18n purposes...
And
r3dfox now is in a state where, due to "multiple changes" (many originating from the LW fork), it has also become incompatible with Fx langpacks (and, I assume, also with LW langpacks)

; GH issues about this breakage have already been reported:
https://github.com/Eclipse-Community/r3dfox/issues/168
https://github.com/Eclipse-Community/r3dfox/issues/172
https://github.com/Eclipse-Community/r3dfox/issues/178
So, with much respect to the
r3dfox author, the Fx langpacks breakage, for me, came as a consequence of
certain concrete intentions, i.e. it's not a random accident

...
Another thing that kind of irks me is the frequent comparison to the
MyPal68 browser; they are different projects, aren't they? With different target groups, probably (MyPal68 mainly appealing to
XP-die-hards); I appreciate that their authors may share code/ideas/etc., as is the case with the
e3k Chinese dev, but why should it be acceptable for a r3dfox user that MyPal68 is also broken when it comes to Fx langpacks? FWIW, the Russian community of MyPal68 users has contributed
this; I don't think we'll see something like that for r3dfox and, in any case, I don't speak Russian myself

...
Regards.