Hijacking the comment for better visibility. After getting some backlash, the government has already backed down. They claim that installing the certificate is entirely voluntary.
https://rus.azattyq.org/a/30064788.html
They have been talking about this stuff for some years, though. It will get implemented at some point. I have a feeling it was one of their "test trials": can we boil the frog yet, or do we have to heat the water up a bit more?