I read a lot of comments that agar.io was blocked on some schools or work offices. Huh, someone wants you to be more productive, right?
I tried to find more informations about this and I found a post on reddit:
So, what to do if agar.io is blocked on your school or office network?
It’s much harder to block it. But the game might have a slightly increased latency (because the connection needs to have its TLS terminated before being handed to the game server), so avoid using https unless necessary.
Not all servers support https yet so it might take a bit longer to connect.