Generic firefox about:config optimizations.

Document describing configurations : http://kb.mozillazine.org/About:config_entries

Set to false

browser.newtabpage.activity-stream.feeds.telemetry
browser.newtabpage.activity-stream.telemetry
browser.ping-centre.telemetry
toolkit.telemetry.archive.enabled
toolkit.telemetry.bhrPing.enabled
toolkit.telemetry.enabled
toolkit.telemetry.firstShutdownPing.enabled
toolkit.telemetry.hybridContent.enabled
toolkit.telemetry.newProfilePing.enabled
toolkit.telemetry.reportingpolicy.firstRun
toolkit.telemetry.shutdownPingSender.enabled
toolkit.telemetry.unified
toolkit.telemetry.updatePing.enabled

dom.webnotifications.enabled

browser.tab.animate

extensions.checkCompatibility

browser.tabs.firefox-view   # disable overview/view
extensions.pocket.enabled   # disable getpocket
reader.parse-on-load.enabled  # disable reader-view

toolkit.cosmeticAnimations.enabled

Set to true

gfx.webrender.all # Enable web renderer
network.dns.disablePrefetch
content.interrupt.parsing

network.http.pipelining
network.http.proxy.pipelining
content.notify.ontimer
browser.urlbar.clickSelectsAll

network.http.max-persistent-connections-per-server = 10
network.http.max-persistent-connections-per-proxy = 64
network.http.request.max-start-delay = 0

network.http.speculative-parallel-limit = 0

network.http.pipelining.maxrequests = 128
content.notify.interval = 500000

content.switch.threshold = 250000
nglayout.initialpaint.delay = 0
nglayout.initialpaint.delay_in_oopif = 0
network.http.max-connections-per-server = 16

dom.ipc.processCount = 12
browser.cache.disk.capacity = 500000