{
# Disable access to device sensor data
# Disallow websites to access sensor data (ambient light, motion, device
# orientation and proximity data).
  "device.sensors.ambientLight.enabled" = false;
  "device.sensors.enabled" = false;
  "device.sensors.motion.enabled" = false;
  "device.sensors.orientation.enabled" = false;
  "device.sensors.proximity.enabled" = false;

# Using a popular useragent string
# (https://techblog.willshouse.com/2012/01/03/most-common-user-agents/) avoids
# attracting attention i.e. with an Iceweasel UA. (keep blank to use the default)

# Block Cookies
# Block 3rd-Party cookies or even all cookies.
  "network.cookie.cookieBehavior" = 5;

# Block Referer
# Firefox tells a website, from which site you're coming (the so called RefControl
# (http://kb.mozillazine.org/Network.http.sendRefererHeader">referer</a>). You can
# find more detailed settings in this <a
# href="http://www.ghacks.net/2015/01/22/improve-online-privacy-by-controlling-referrer-information/">ghacks
# article</a> or install the <a
# href="https://addons.mozilla.org/firefox/addon/refcontrol/) extension for per
# domain settings.
  "network.http.referer.spoofSource" = true;

# Disable DOM storage
# Disables DOM storage, which enables so called "supercookies". Some modern sites
# will not work (i.e. missing "save" functions).
  "dom.storage.enabled" = true;

# Disable IndexedDB (breaks things)
# abused for tracking (http://www.w3.org/TR/IndexedDB/">IndexedDB</a> is a way,
# websites can store structured data. This can be <a
# href="http://arstechnica.com/apple/2010/09/rldguid-tracking-cookies-in-safari-database-form/),
# too. Disabling causes problems when sites depend on it like Tweetdeck or Reddit
# and extensions that use it to store their data. Some users reported crashing
# tabs when IndexedDB is disabled. Only disable it, when you know what you're
# doing.
  "dom.indexedDB.enabled" = true;

# Disable the Offline Cache.
# Websites can store up to 500 MB of data in an offline cache
# (http://kb.mozillazine.org/Browser.cache.offline.enable), to be able to run even
# when there is no working internet connection. This could possibly be used to
# store an user id.
  "browser.cache.offline.enable" = false;

# Sessionstore Privacy
# This preference controls when to store extra information about a session:
# contents of forms, scrollbar positions, cookies, and POST data.
  "browser.sessionstore.privacy_level" = 2;

# Disable Link Prefetching
# Firefox prefetches the next site on some links, so the site is loaded even when
# you never click.
  "network.prefetch-next" = false;
  "network.dns.disablePrefetch" = true;
  "network.dns.disablePrefetchFromHTTPS" = true;
  "network.predictor.enabled" = false;
  "network.predictor.enable-prefetch" = false;

# Disable speculative website loading.
# In some situations Firefox already starts loading web pages when the mouse
# pointer is over a link, i. e. before you actually click. This is to speed up the
# loading of web pages by a few milliseconds.
  "network.http.speculative-parallel-limit" = 0;
  "browser.urlbar.speculativeConnect.enabled" = false;

# Use a private container for new tab page thumbnails
# Load the pages displayed on the new tab page in a private container when
# creating thumbnails.
  "privacy.usercontext.about_newtab_segregation.enabled" = true;

# Disable WebGL
# Disables the WebGL function, to prevent (ab)use the full power of the graphics
# card (http://www.uniquemachine.org/">fingerprinting with WebGL</a>. Another
# issue is, that websites can <a
# href="https://isc.sans.edu/forums/diary/Time+to+disable+WebGL/10867). WebGL is
# part of some fingerprinting scripts used in the wild. Some interactive websites
# will not work, which are mostly games.
  "webgl.disabled" = false;

# Override graphics card vendor and model strings in the WebGL API
# Websites can read the graphics card vendor and model using a WebGL API. This
# setting overrides both with " " without disabling WebGL.
  "webgl.renderer-string-override" = " ";
  "webgl.vendor-string-override" = " ";

# Disable WebRTC
# Disables the WebRTC function, which gives away your local ips. Some addons like
# uBlock origin provide settings to prevent WebRTC from exposing local ips without
# disabling WebRTC.
  "media.peerconnection.enabled" = true;

# Disable the clipboardevents.
# Disable that websites can get notifications if you copy, paste, or cut something
# from a web page, and it lets them know which part of the page had been selected.
  "dom.event.clipboardevents.enabled" = false;

# Disable Fixup URLs
# When you type "something" in the urlbar and press enter, Firefox tries
# "something.com", if Fixup URLs is enabled.
  "browser.fixup.alternate.enabled" = false;

}