How's My SSL? [1] now reports "Your SSL client is Probably Okay." for Firefox 27. Awesome!
I don't think I would trust their judgement about how my SSL is doing.
I am happy about this Firefox release; it is not just that you had to be an advanced user to get TLS 1.2 previously but that doing so would break over half the web. Now it is possible to use TLS 1.2 where available and not use it when not available.
security.tls.version.max = 3
security.tls.version.min = 1
security.ssl3.rsa_fips_des_ede3_sha = false
in about:config, after which it also said "Probably good" for FF26.