SSL Observatory not using Tor when FoxyProxy is enabled

When FoxyProxy is enabled, and the SSL Observatory is enabled and set to use Tor, access to the Observatory seems to use FoxyProxy's rules instead of going through Tor, without HTTPS Everywhere noticing.

A workaround is to add the Tor proxy to FoxyProxy and a rule to use that for access to observatory.eff.org, but that will only work while in FoxyProxy's default mode.

If there's no way for HTTPS Everywhere to override FoxyProxy, then maybe it should at least test that access through Tor actually works as intended before submitting certificates.