Think about censorship as a tool.
This tool may be used for good or for bad.
E.g., it may be used to hinder piracy, provide privacy, protect citizens from being fooled by some fake propaganda. However this tool may also be abused by bad actors, e.g., power usurpators like the Russian government to present the Kremlin in a good view and gain more supporters.
Some people think that the tool of censorship brings more evil than good and so it shouldn’t be used by any actor at all. In your case, both Russian and German state censorships shouldn’t exist and consumers of propaganda should use critical thinking, doubt the information they receive and so protect themselves on their own.
Should Mozilla ban Russian state censorship but allow German? Should they give this tool to good actors/states and deprive of it bad actors/states? It depends on what role the company wants to take, its principles and values, the balance between users freedoms and compliance to the laws of acknowledged and democratically (kind of) elected governments. I hope Mozilla will clarify their stance shortly.