About config
2015-09-06 [updated 2017-04-28]

A few Firefox about:config customisations.

security.ssl3.ecdhe_ecdsa_rc4_128_sha false
security.ssl3.ecdhe_rsa_rc4_128_sha false
security.ssl3.rsa_rc4_128_md5 false
security.ssl3.rsa_rc4_128_sha false
security.tls.unrestricted_rc4_fallback false

privacy.trackingprotection.enabled true

browser.sessionstore.interval 3600000

browser.newtab.url about:blank

browser.urlbar.trimURLs false
browser.urlbar.clickSelectsAll false
browser.urlbar.autocomplete.enabled false
network.IDN_show_punycode true

dom.event.clipboardevents.enabled false
network.protocol-handler.warn-external.itms true

network.http.sendRefererHeader 1
network.http.referer.XOriginPolicy 1
network.http.referer.spoofSource true
network.http.referer.trimmingPolicy 2

media.peerconnection.enabled false

geo.wifi.uri (blank)
geo.enabled false

browser.cache.disk.enable false
browser.cache.offline.enable false
browser.cache.disk.capacity 0
browser.cache.offline.capacity 0