There are a few worrying cases. One person, for example, got his house raided for calling a politician a dick on Twitter [0]. There are also a few far-reaching laws, such as the NetzDG [1], which is being pretty harshly criticized. That being said, Germany has never been as pro-free speech as the US (holocaust denial, for example, is illegal for a long time already) and you can still state your opinion pretty openly, as long as you're not an extremist.

[0] https://www.spiegel.de/panorama/pimmelgate-hausdurchsuchung-...

[1] https://en.wikipedia.org/wiki/Network_Enforcement_Act#Critic...