FireFox save?
It was a security flaw in FireFox that lead to the closing of Silk Road and other sites.
The initial reporting was speculative or plain wrong, it was an already patched vulnerability. The exploit was an old and patched exploit, it just that people using the Tor Browser did not update their browsers. Law enforcement just reversed engineered old security patches, and that was it. It could happen to any browser including Chrome.
Tor Browser, (based on Firefox) back then did not have an automatic update based on privacy concerns. They released it through their website, but people did not update their browsers accordingly. On the other hand, you would think that people using Tor Browsers to do obviously illegal things like child pornography, and drugs would be on top of security.
