Set your security level to "Safest" to prevent scripts from deanonymizing you.
Services like Proton Mail and SecureDrop are staples for anonymous whistleblowing and email. Safety Precautions topic links 20 onion verified
Yes, Facebook has a verified .onion site. Why? To allow users in countries that block Facebook to access it, and to allow users to login without revealing their physical location. Set your security level to "Safest" to prevent