The one dial that closes the biggest hole.
The Tor Browser shield hides three security levels, and for Osiris only one is correct.
Standard leaves scripting on. Safer disables some risky scripting. Safest turns scripting off everywhere. The levels are not about the Tor network, which is identical at each. They change what the browser does with a page once it arrives.
Scripting in a hostile page is the single most reliable route to break anonymity from inside the browser. Turning it off closes that route. Safest does it unconditionally, and Osiris is built to work with scripting off, so login, browsing, checkout and messaging all function.
