Is TOR No Longer Safe?

Hello there,

I was surfing the web a looking for scripts in PHP when I came across this:

FBI crack Tor and catch 1,500 visitors to biggest child pornography website on the dark web

They mention, and I quote "deployed a network investigative technique (NIT) – a hacking tool – and used a single warrant to uncover 1,300 IP addresses, tracing these addresses back to actual individuals." in a server that they seized and hosted for two more weeks in their own installations.

Can we say that ToR is no longer safe to use?

Full history here http://www.ibtimes.co.uk/fbi-crack-tor-catch-1500-visitors-biggest-child-pornography-website-dark-web-1536417

In here you can read how the FBI acted to break those machines https://motherboard.vice.com/read/the-fbis-unprecedented-hacking-campaign-targeted-over-a-thousand-computers

Cheers