Mozilla FireFox & FireFoxNightly Performance Tweaks

Performance Configurations for Mozilla Firefox

Go to about:config in the address bar, hit enter.
Click "I'll be careful, I promise".
In the search bar type: change its value to: as below:

Name	Value
accessibility.blockautorefresh	TRUE
accessibility.typeaheadfind.flashBar	0
browser.cache.disk.capacity	0
browser.cache.disk.enable	FALSE
browser.cache.disk.filesystem_reported	1
browser.cache.disk.metadata_memory_limit	51200
browser.cache.disk.smart_size.first_run	FALSE
browser.cache.frecency_experiment	4
browser.cache.memory.max_entry_size	-1
browser.cache.use_new_backend	1
browser.display.show_image_placeholders	FALSE
browser.link.open_newwindow.restriction	0
browser.places.smartBookmarksVersion	8
browser.search.suggest.enabled	FALSE
browser.sessionstore.interval	3600000
browser.sessionstore.resume_from_crash	FALSE
browser.startup.homepage	about:config
browser.tabs.crashReporting.sendReport	FALSE
browser.tabs.remote.autostart	TRUE
browser.tabs.remote.autostart.1	TRUE
browser.urlbar.maxRichResults	16
browser.urlbar.searchSuggestionsChoice	FALSE
browser.urlbar.suggest.history	FALSE
browser.urlbar.suggest.openpage	FALSE
browser.urlbar.suggest.searches	FALSE
dom.battery.enabled	FALSE
dom.disable_window_move_resize	TRUE
dom.disable_window_open_feature.close	TRUE
dom.enable_performance	FALSE
dom.enable_performance_observer	FALSE
dom.enable_resource_timing	FALSE
dom.event.clipboardevents.enabled	FALSE
dom.event.contextmenu.enabled	FALSE
dom.gamepad.enabled	FALSE
dom.ipc.plugins.flash.subprocess.crashreporter.enabled	FALSE
dom.ipc.plugins.reportCrashURL	FALSE
dom.push.enabled	FALSE
dom.webnotifications.enabled	FALSE
dom.webnotifications.serviceworker.enabled	FALSE
image.animation_mode	none
layers.acceleration.force-enabled	TRUE
media.benchmark.vp9.fps	195
media.benchmark.vp9.versioncheck	2
media.eme.enabled	FALSE
media.gmp-gmpopenh264.version	2
media.gmp.storage.version.observed	1
media.navigator.enabled	FALSE
media.navigator.video.enabled	FALSE
media.peerconnection.enabled	FALSE
media.video_stats.enabled	FALSE
network.allow-experiments	FALSE
network.cookie.cookieBehavior	1
network.cookie.lifetimePolicy	2
network.cookie.prefsMigrated	TRUE
network.dns.disableIPv6	TRUE
network.dns.disablePrefetch	TRUE
network.http.max-connections	1200
network.http.max-persistent-connections-per-server	10
network.http.speculative-parallel-limit	0
network.predictor.cleaned-up	TRUE
network.predictor.enabled	FALSE
network.prefetch-next	FALSE
network.websocket.max-connections	250
plugin.disable_full_page_plugin_for_types	application/pdf
plugin.state.java	0
privacy.clearOnShutdown.offlineApps	TRUE
privacy.clearOnShutdown.siteSettings	TRUE
privacy.donottrackheader.enabled	TRUE
privacy.history.custom	TRUE
privacy.sanitize.sanitizeOnShutdown	TRUE
privacy.trackingprotection.enabled	TRUE
privacy.trackingprotection.introCount	20
security.dialog_enable_delay	0
security.OCSP.enabled	1
security.OCSP.require	TRUE
services.sync.declinedEngines	tabs,addons,passwords,history
services.sync.engine.addons	FALSE
services.sync.engine.history	FALSE
services.sync.engine.passwords	FALSE
services.sync.engine.prefs.modified	FALSE
services.sync.engine.tabs	FALSE
storage.vacuum.last.index	1
webgl.disabled	TRUE