Firefox 4 Beta 8+ users can enable websockets by toggling network.websocket.override-security-block in about:config. It still doesn't work in the latest nightly

Firefox 4 Beta 8+ users can enable websockets by toggling network.websocket.override-security-block in about:config. It still doesn't work in the latest nightly, though, as I can't draw anything. Websockets were disabled in Firefox 4b8+ because of supposed security problems in the protocol.