We disabled the *Unsafe Browser* by default and clarified that [[the *Unsafe Browser* can be used to deanonymize you|doc/anonymous_internet/unsafe_browser#security]].
An attacker could exploit a security vulnerability in another application in Tails to start an invisible *Unsafe Browser* and reveal your IP address, even if you are not using the *Unsafe Browser*.
For example, an attacker could exploit a security vulnerability in *Thunderbird* by sending you a phishing email that could start an invisible *Unsafe Browser* and reveal them your IP address.
This feature is beta and only the additional setting to enable the *Unsafe Browser* is made persistent. The other settings (language, keyboard, and other additional settings) will be made persistent in Tails 4.9 (July 28).