You can disagree with it. You can refuse to do business in that country. But to actively work in hostility ti a foreign government is criminal.
I am surprised there are no US laws that would adversley affect Mozilla.
Your views and opinions,however well intended ,they do not supersede a government's legitimate right to govern its citizens.
The only exceptions are human rights violations or crimes against humanity. TLS intetception hardly counts as such. If it does,please prosecute US corporations that intercept TLS before you meddle with a foreign country's practices.
I think people forget that the internet does not supersede geographic boundaries and legitimate (as in accepted as such by other nations) governments.