New Tor Browser http response header, for high security websites
Here's some of the discussion about this on the SecureDrop issue tracker: https://github.com/freedomofpress/securedrop/issues/1566
I'd like to propose a new custom http response header that Tor Browser watches for:
X-Tor-High-Security: 1. If you load a website with this header set, no matter what the Tor Browser security slider is currently set to, it should treat that tab as if the slider were set to high.
This would also be very useful for anyone running websites where they include themselves in the threat model, such as Tor-based email providers.