The Mozilla community is governed by participation guidelines that state: "support for exclusionary practices must not be carried into Mozilla activities," and "support for exclusionary practices in non-Mozilla activities should not be expressed in Mozilla spaces."
http://www.mozilla.org/en-US/about/governance/policies/parti...
UPDATE: In a meeting with Mozilla staff this morning, Brendan reiterated that he was involved in the creation of that code of conduct, and supports it 100%. He also specifically said that he should be held accountable to it, and that it's important for those in positions of power to be accountable to those with less power.