A security vulnerability was discovered in the sandboxing mechanism of *Firefox* and *Tor Browser*. This vulnerability allows a malicious website to bypass some of the confinement built in *Firefox*, which means possibly spying on the content of other tabs and steal the passwords of other websites.
Because *Tor Browser* in Tails is [[confined using *AppArmor*|doc/anonymous_internet/Tor_Browser#confinement]], only the data accessible to *Tor Browser* might be compromised but not the other applications or your other files. For example, a compromised *Tor Browser* might access your files in the *Tor Browser* and *Persistent/Tor Browser* folders but not anywhere else.
Visit an untrusted website if you have sensitive information stored in your *Persistent/Tor Browser* folder. The untrusted website might access these files.