Earlier quoted context omitted.
How's My SSL? [1] now reports "Your SSL client is Probably Okay." for Firefox 27. Awesome! [1] https://www.howsmyssl.com/
Fedora 20 (firefox 26), "Your SSL client is Bad." :(
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.