/g/ Firefox Guide

Add-ons:
Adblock Edge
HTTPS Everywhere
NoScript (Limits functionality unless you make exceptions for the sites you use regularly)
Request Policy (Limits functionality unless you make exceptions for the sites you use regularly)

about:config:
beacon.enabled - false
browser.cache.disk.enable - false
browser.cache.disk.capacity - 0
browser.cache.offline.capacity - 0
browser.cache.offline.enable - false
browser.fixup.alternate.enabled - false
browser.pagethumbnails.capturing_disabled - prevents firefox from creating thumbnails of visited sites
browser.newtabpage.enabled - false
browser.newtab.url - "about:blank"
browser.safebrowsing.appRepURL - blank // FF 32+
browser.safebrowsing.enabled - false
browser.safebrowsing.malware.enabled - false
browser.startup.page - INTEGER
datareporting.healthreport.uploadEnabled - false
dom.event.clipboardevents.enabled - false
dom.storage.enabled - true
dom.storage.default_quota - 1 // allows 1kb for captchas //
general.useragent.override - "Mozilla/5.0 (X11; Linux x86_64; rv:29.0) Gecko/20100101 Firefox/29.0"
geo.enabled - false
geo.wifi.uri - "http://127.0.0.1"
media.autoplay.enabled - false
media.peerconnection.enabled - false //Disables WebRTC. WebRTC exposes your network IP(s), without user interaction. //
network.dns.disablePrefetch - true
network.cookie.cookieBehavior - 1
network.cookie.lifetimePolicy - 2
network.IDN_show_punycode - true  // Don't get caught going to a fake unicode url. //
network.http.referer.spoofSource - true // Built in referer spoofing exists now in firefox. Policy 1 means same url as you requested, 2 is the same base url.  Breaks some sites //
network.http.referer.trimmingPolicy 1
network.http.sendRefererHeader - 0
network.http.sendSecureXSiteReferrer - false
network.prefetch-next - false
network.proxy.socks_remote_dns - true
privacy.donottrackheader.enabled - false
plugins.enumerable_names //Set the entry to nothing.// disable plugin data //
toolkit.telemetry.enabled - false

Settings:
Set default browser search engine to StartPage:
https://startpage.com/eng/download-startpage-plugin.html