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Firefox Privacy – The Complete How-To Guide for 2022

January 3, 2022 By Sven Taylor — 243 Comments
Firefox Privacy

This guide contains updated recommendations and privacy tweaks for Firefox, revised to reflect the latest version and new features for 2022.

Mozilla Firefox is one of the best browsers available that combines strong privacy protection features, good security, active development, and regular updates. The newest version of Firefox is fast, light-weight, and packed full of privacy and security features.

It is for this reason that I consider Firefox to be the best all-around browser for privacy and security. It remains a solid alternative to some of the other options, such as Google Chrome, Microsoft Edge, and Safari.

Another great aspect of Firefox is that it is highly customizable, which is the point of this guide. Below we will go over how you can customize Firefox to give you the security and privacy you desire, while still working well for day-to-day browsing.

But before we jump in, let’s cover some important details.

Important considerations before starting

There are many factors to consider when configuring Firefox to meet your needs, including your threat model and browsing preferences. In other words, there is no “one-size-fits-all” configuration that will work for everyone. This guide is a basic overview covering some of the different configurations options.

Before you start modifying Firefox and installing a bunch of add-ons, it’s important to consider browser fingerprinting.

Browser fingerprinting

The issue of browser fingerprinting (or device fingerprinting) is a big topic that covers all the different ways you can be tracked and identified by your system and various settings. All of the different add-ons you install and preference modifications you make to Firefox are inputs that can potentially be used to identify and track you.

Herein lies the catch-22: the more browser add-ons you install and settings you modify, the more likely you will stand out from the crowd and be easier to track. There are solutions for this and the latest version of Firefox does offer some fingerprinting protection. I discuss this problem and also provide solutions in the browser fingerprinting guide.

And that leads us to the next point that…

More is not always better

When it comes to browser add-ons and modifications, you don’t want to be like that kid who puts every topping imaginable on his ice cream. Similarly, more is not always better with Firefox browser add-ons.

Aside from the issue of browser fingerprinting, having too many add-ons may slow down performance and break things. Many of the popular Firefox add-ons also fulfill the same functions and are redundant when used together.

Therefore it is best to strike a balanced approach. Install and modify only what you think will be useful and necessary for your specific situation.

Proceed with caution

Modifying some of these settings may interfere with your browsing experience and break some websites (they won’t load properly). Therefore taking an incremental approach may be the best way to proceed. You can continue to install add-ons and adjust your settings as you see what works best for your needs.

This allows you to modify the settings, create exceptions, or add sites to a whitelist.

Firefox privacy tweaks

Before you get going with Firefox you may want to adjust the following settings for better privacy.

Note: if you are a Mac OS user, you will see the word “Preferences” in your menu rather than “Options” as it is listed below.

Disable Firefox telemetry

With the latest version of Firefox, it is configured to share “technical and interaction data” with Mozilla. This includes the ability to “install and run studies” on your computer. You can learn more about these studies and data collection practices, but I’d recommend disabling these settings.

To disable go to Open Menu (three bars at the top right corner of the browser) > Options > Privacy & Security > Firefox Data Collection and Use and then uncheck the boxes as you see below:

firefox telemetry security
It is easy to disable telemetry in Firefox.

You can also disable data sharing with Firefox for Android by going to Menu > Options > Privacy > Data Choices and then uncheck all three categories for Telemetry, Crash Reporter, and Mozilla Location Service.

Note: You can also disable this in the About:Config settings with toolkit.telemetry.enabled set to false.

Change the default search engine in Firefox

Firefox now uses Google as the default search engine, but there are other private search engines you can use instead.

To do this, go to Menu > Options > Search > Default Search Engine. Firefox does not provide you with very many alternatives directly in the settings area. However, you can view more options by going down to One-Click Search Engines and then click Find more search engines to see the other alternatives.

See our guide on private search engines to dive into this topic more.

Firefox also has a guide on modifying your search engine preferences.

Firefox Content Blocking

Another great new feature with Firefox is Content Blocking. This customizable feature will automatically block “content that tracks the sites you visit and profiles you.” You can choose between Standard, Strict, and Custom modes, which allow you to block:

  • Cookies
  • Tracking content
  • Cyrptominers
  • Fingerprinters

To adjust the Firefox Content Blocking settings, go to Menu > Options > Privacy and Security > Content Blocking and then select which mode you want to use.

firefox content blocking privacy

The Standard setting may be the best balance for regular users. Firefox warns that Strict mode may “cause some websites to break.” However, you can still…

Disable content blocking for specific sites

It’s easy to disable content blocking for certain trusted sites. Simply enter the website URL, then click the “i” icon to the left of the address bar, then click the grey button to “Turn off Blocking for This Site.”

turn off content blocking firefox

Another benefit of Firefox’s Content Blocking feature is that it can save your data and improve page load speeds.

The “Do Not Track” request

Firefox also has an option to request that websites “do not track” you online. This is simply an HTTP header field that you can easily enable. However, the key word here is request, because this is not actually blocking anything. We have also learned that many websites simply ignore these requests.

In addition to being ignored by most sites, this is also a value that can be used for browser fingerprinting purposes, as explained here. Therefore I no longer recommend enabling or modifying the Do Not Track settings, which you’ll find in the Content Blocking settings area.

You can learn more about the Do Not Track feature here.

Firefox About:Config settings

Aside from the general Menu settings we used above, you can also make a number of different modifications using about:config.

Note: If you made all of the changes above, you may notice that some of these settings are already updated in about:config. We will still cover the different about:config since some people prefer to modify settings in this area, rather than through the general Menu.

To access these configuration settings, simply enter about:config into the URL bar and hit enter. You will then be prompted with a warning screen stating “This might void your warranty.” Just click “I accept the risk” to continue.

firefox about.config changes

After proceeding, you will see a large list of preferences, which each include a status, type, and value.

These preferences will be listed in alphabetical order and are easily searchable from the search bar near the top.

firefox about config changes

Modifying preferences – You can modify any of these Firefox preferences by simply double clicking the preference name. If the preference is a “boolean” type, then double clicking will change the value to true or false. If the preference is an “integer” or “string” type, double clicking will open a box to change the value.

Here are my recommended changes:

Disable WebRTC:
media.peerconnection.enabled (WebRTC) = false

WebRTC stands for “Web Real-Time Communication” and it allows for voice, video chat, and P2P sharing through your browser. Unfortunately, this capability can also expose your real IP address through browser STUN requests, even if you are using a good VPN service. (This is called a WebRTC leak.)

To disable WebRTC in Firefox simply enter media.peerconnection.enabled into the search bar and then double click the value to change it to false.

firefox disable webrtc

Aside from Firefox, the WebRTC vulnerability also affects Chrome, Opera, Brave, and other Chromium-based browsers. Safari is also in the process of implementing WebRTC.

Note: If you disable WebRTC, services like Google Meet and Whereby may not work.

Resist Fingerprinting:
privacy.resistFingerprinting = true

Changing this preference to true will help to make Firefox more resistant to browser fingerprinting.

Note: There are many factors that go into browser fingerprinting and the ability of an adversary to identify you. See the browser fingerprinting guide for additional details.

privacy.trackingprotection.fingerprinting.enabled = true

This is a new preference with Firefox 67+ to block fingerprinting.

privacy.trackingprotection.cryptomining.enabled = true

Another new preference with Firefox 67+, this will block cryptominers.

First party isolate
privacy.firstparty.isolate = true

Changing this to true will isolate cookies to the first party domain, which prevents tracking across multiple domains. First party isolation also does much more than isolating cookies, it affects: cookies, cache, HTTP Authentication, DOM Storage, Flash cookies, SSL and TLS session resumption, Shared Workers, blob URIs, SPDY and HTTP/2, automated cross-origin redirects, window.name, auto-form fill, HSTS and HPKP supercookies, broadcast channels, OCSP, favicons, mediasource URIs and Mediastream, speculative and prefetched connections.

This preference was added in late 2017 as part of the Tor Uplift Project.

Tracking protection
privacy.trackingprotection.enabled = true

Another new update, this is Mozilla’s built-in tracking protection feature. This will use a Disconnect.me filter list, but may be redundant if you are using uBlock Origin 3rd party filters.

Disable geolocation tracking
geo.enabled = false

Setting this to false will disable geolocation tracking, which may be requested by a site you are visiting. As explained by Mozilla, this preference is enabled by default and utilizes Google Location Services to pinpoint your location. In order to do that, Firefox sends Google:

  1. your computer’s IP address
  2. information about nearby wireless access points
  3. a random client identifier, which is assigned by Google (expires every two weeks)

Before this data is sent to Google, you would first get a request by the site you are visiting. Therefore you do have control over this, even if geo remains enabled.

media.navigator.enabled = false

Setting this preference to false will block websites from being able to track the microphone and camera status of your device.

network.cookie.cookieBehavior

This is an integer type preference with different values. Here are the cookie preference options:

  • 0 = Accept all cookies by default
  • 1 = Only accept from the originating site (block third-party cookies)
  • 2 = Block all cookies by default
  • 3 = Block cookies from unvisited sites
  • 4 = New Cookie Jar policy (prevent storage access to trackers)

Any selection between 1 and 4 would improve privacy. The New Cookie Jar policy (value 4) offers more protection, but it may also break the functionality of some websites. Ghacks has a discussion of the New Cookie Jar policy here.

network.cookie.lifetimePolicy = 2

This is another integer type preference that you should set to a value of 2. This preference determines when cookies are deleted. Here are the different options:

  • 0 = Accept cookies normally
  • 1 = Prompt for each cookie
  • 2 = Accept for current session only
  • 3 = Accept for N days

With a value of 2, websites you visit should work without any problems, and all cookies will be automatically deleted at the end of the session.

network.dns.disablePrefetch = true

Setting this preference to true will disable Firefox from “prefetching” DNS requests. While advanced domain name resolution may slightly improve page load speeds, this also comes with some risks, as described in this paper.

network.prefetch-next = false

Similar to prefetching DNS requests above, setting this preference to false will prevent pages from being prefetched by Firefox. Mozilla has deployed this feature to speed up web pages that you might visit. However, it will use up resources and poses a risk to privacy. This is another example of performance at the price of privacy.

Disable WebGL:
webgl.disabled = true

WebGL is a potential security risk, which is why it is best disabled by setting webgl.disabled to true. Another issue with WebGL is that it can be used to fingerprint your device.

You can get more information on the WebGL issue here and here.

dom.event.clipboardevents.enabled = false

This prevents websites from getting notifications if you copy, paste, or cut something from the page.

media.eme.enabled = false

This disables the playback of DRM-controlled HTML5 content. See details here.

Firefox “safe browsing” preferences

There are many recommendations to disable the Safe Browsing feature in Firefox due to privacy concerns and potential Google tracking. However, these concerns are based on an older version of the Safe Browsing feature, which would utilize “real-time lookup” of website URLs. This method has not been in use since 2011 – explained further here.

If a URL is needed, Firefox takes the following precautions to protect user privacy, as explained by François Marier, a security engineer for Mozilla:

  • Query string parameters are stripped from URLs we check as part of the download protection feature.
  • Cookies set by the Safe Browsing servers to protect the service from abuse are stored in a separate cookie jar so that they are not mixed with regular browsing/session cookies.
  • When requesting complete hashes for a 32-bit prefix, Firefox throws in a number of extra “noise” entries to obfuscate the original URL further.

Therefore I would conclude that disabling Safe Browsing would give you no tangible privacy benefits, while also being a security risk. That being said, if you still want to disable this feature, here’s how in the about:config area:

  • browser.safebrowsing.phishing.enabled = false
  • browser.safebrowsing.malware.enabled = false

Firefox privacy and security add-ons

There are some great Firefox browser add-ons that will give you more privacy and security. With that being said, many of the add-ons we previously recommended are no longer necessary thanks to Firefox’s upgraded privacy and security settings.

Note: When looking for Firefox add-ons, be sure to consider what you need in relation to the preferences you modified above. Some add-ons will be redundant and not necessary depending on your Firefox preferences and the other add-ons you are using.

uBlock Origin

ublock origin firefox

uBlock Origin is an efficient, light-weight blocker that filters both ads and tracking. It has risen to popularity as a powerful alternative to Adblock Plus, which allows “acceptable ads” that many users disdain. One added benefit of uBlock Origin is that it can significantly improve performance and page load speed.

Another great feature with uBlock Origin is the ability to whitelist certain websites. Given that many sites will block access if they detect an ad-blocker, the ability to whitelist will come in handy. uBlock Origin is free and entirely open source.

NoScript

NoScript is a script-blocker that allows you to identify/block scripts running on websites. While it does give you control, NoScript can be a pain to get configured properly. It breaks many websites, which requires you to tweak and configure the options. If you are already using uBlock Origin, then you probably don’t need to be using NoScript.

This is definitely not an add-on for the casual user or those who don’t have the patience to devote some time into configuration.

Using a VPN with Firefox

Firefox currently offers a VPN (virtual private network) called Mozilla VPN. However, this is just a rebranded version of Mullvad and I have seen many users complaining on various forums about the lack of support when things go wrong.

Note that while some VPNs offer browser extensions for Firefox, these are fundamentally different from a full VPN. A VPN will run on your operating system (not just your browser) and encrypt all internet traffic on your operating system. This is different from a browser extension that only wraps your browsing traffic inside an additional layer of encryption.

Additionally, some Firefox VPN extensions are actually just an extension of the desktop VPN application. These “extensions” literally just extend control of the VPN to a convenient browser interface. We discuss this and more in our guide on the best VPNs for Firefox.

Firefox DNS over HTTPS (DoH) is not a great idea

Just like with Firefox Private Network, the implementation of DNS over HTTPS also relies on Cloudflare infrastructure. In fact, it makes Cloudflare the central processing point for all DNS requests in the Firefox browser by default.

While DNS over HTTPS may sound advantageous in some respects, there are also potential concerns. Rather than going over why, you can read the article, Centralised DoH is bad for privacy, in 2019 and beyond, which concludes:

Centralised DoH is currently a privacy net negative since anyone that could see your metadata can still see your metadata when DNS is moved to a third party. Additionally, that third party then gets a complete log per device of all DNS queries, in a way that can even be tracked across IP addresses.

Even if further privacy leaks are plugged, DoH to a third party remains at best a partial solution, one that should not be relied upon as a serious security layer, since it will be hard to plug everything, especially if non-CDN content providers survive.

Encrypting DNS is good, but if this could be done without involving additional parties, that would be better.

And for actual privacy on untrusted networks, nothing beats a VPN, except possibly not using hostile networks.

Many people also assume that encrypted third-party DNS will somehow offer privacy and anonymity. This is a false assumption. Your IP address and location remains exposed with everything you do online, while your ISP will still be able to see the websites you visit (IP addresses) even if it’s no longer handling DNS requests. In conclusion, a good VPN will offer much more protection than DoH through Cloudflare.

To disable DNS over HTTPS (DoH) in Firefox go to Menu > Options > General and then scroll down to Network Settings and click the Settings button. In the box that opens, scroll down to Enable DNS over HTTPS, where it can be enabled or disabled.

firefox dns over https doh

user.js Firefox hardening

For more information and resources on Firefox hardening, see here: user.js Firefox hardening.

As explained on their GitHub page, this is a “configuration file that can control hundreds of Firefox settings. For a more technical breakdown and explanation, you can read more on the overview wiki page.”

Their Wiki page is also full of great information.

Firefox privacy conclusion

In my opinion, Firefox remains the best all-around, mainstream browser on the market for privacy when it is modified as recommended above.

While many of the configurations and add-ons discussed in this guide will go a long way to giving you more privacy, there is one issue that remains: concealing your IP address and location. To do this, a good VPN service is necessary. The Tor network also achieves this end, but it comes with the drawbacks of slow speeds, risks, and limitations (only works in a browser).

For more options in addition to Firefox, see the secure browser guide.

About Sven Taylor

Sven Taylor is a digital privacy expert who has been writing about privacy and security online since 2016. With a passion for digital privacy and online freedom, he created RestorePrivacy to provide you with honest, useful, and up-to-date information about online privacy, security, and related topics.

Reader Interactions

Comments

  1. Felicia

    June 28, 2022

    what about Premium Proton VPN and can you expand on Password apps like Last Pass…?
    So when using Mozilla Firefox, to log into Privacy apps, then use what app to browse?

    Reply
  2. Charlene

    June 16, 2022

    this change in about:config privacy.resistFingerprinting changes the size of every web page. I resized them to full screen but when I closed down a site and then reopened it the size went right back to small and I’m not computer smart enough to figure out how to fix this issue
    any suggestions on how to fix this?

    Reply
    • Squid

      June 19, 2022

      The reason being is because the browser window size is fingerprintable. Forcing it to be the same size as others who enable privacy.resistFingerprinting will make everyone’s browsers harder to fingerprint. The only way to fix it is to disable privacy.resistFingerprinting but you lose the privacy advantages of it.

      Reply
  3. sid3C4R

    June 15, 2022

    It appears that setting “privacy.resistFingerprinting = true” does not allow you to use the Bitwarden plugin in Firefox.

    Reply
  4. Sergey

    June 7, 2022

    solution to this fingerprinting problem is solved very easily thanks to GOLOGIN with a promo code for a two-week free period PERSONAX, it can be activated after downloading, a little life hack

    Reply
  5. MuddyWater

    May 5, 2022

    After these modifications, I’m not able to use Jupyter Notebook anymore. I’m redirected to a page saying “Token authentication is enabled “.

    Does someone know what did that ?

    Reply
  6. Mike

    April 1, 2022

    While there are ways you can avoid this identifier, but Mozilla are such hypocrites.

    https://www.ghacks.net/2022/03/17/each-firefox-download-has-a-unique-identifier/

    Reply
    • BoBeX

      May 29, 2022

      @Mike, nice pickup. These things would be preferably opt-in only.

      Reply
  7. Mike

    March 17, 2022

    It is very unfortunate, if not outright sad, that Mozilla would politicize their signature product, Firefox. In short, their removing specific search providers and social media platforms, that happen to be Russian, demonstrates they not only do not respect their user’s privacy but people’s ability to comprehend and interpret information. Firefox and Mozilla’s other products are now useless.

    https://www.bleepingcomputer.com/news/software/mozilla-firefox-removes-russian-search-providers-over-misinformation-concerns/

    Reply
    • Jack Slim

      March 29, 2022

      They all have fear to be put into camp if they don’t obey. Total cowards.

      Reply
      • Arthur Wellesley

        April 24, 2022

        What Browser do you recommend now?

        Reply
      • John

        May 20, 2022

        Hi, I have implemented all your suggestions but now my I am automatically logged out of my accounts on restart. What can I do to stay logged in?

        Reply
  8. nordfan

    March 13, 2022

    Hi Sven,

    I followed these recommendations, and now NordPass refuses to fill in any fields. I’m going back thru undoing everything. Maybe a comment for which of the above breaks NordPass functionality would be great.

    Thanks

    Reply
  9. Felix B-B

    February 4, 2022

    Thanks for the info, for me as an average user this has given me a lot of insight which would probably cost me days to figure out. One question I have is the following. When I was checking FF on the new Panopticlick website (directing me to coveryourtracks.eff.org, I was still unique among more than 250 000 tests run. What I noticed was, that it was possible that a server can request the fonts installed, accounting for about 20% of identifying information. Is there a way to prevent this?

    Reply
    • BG

      February 12, 2022

      Without tweaking advanced preferences in about:config manually or with Arkenfox etc… you can not enjoy the full privacy features Firefox offers. It was very intimidating for me at first but I figured out tweaking manually.

      I do remember reading that there is a privacy settings add on for FireFox but I am not sure if it is still around or currently maintained or for that matter if it will improve your fingerprint

      Reply
      • Garibaldi

        February 20, 2022

        I am Firefox user with Arkenfox user.js and some plugins and Qutebrowser. On amiunique and panopticlick I am with Firefox unique but with mine settings of Qutebrowser I am NOT UNIQUE and I am feeling more secure and not less privacy than on Firefox. Im am on FreeBSD.

        Reply
  10. Lucio

    January 23, 2022

    “privacy.resistFingerprinting = TRUE” cause FF to forget the previous window size and always open in a “small windows”
    If “privacy.resistFingerprinting = FALSE” FF open with the same size of window it has in the previous use.

    Any solution to use the TRUE value and allow FF to open with the same size of window it has before?
    Thanks, Lucio

    Reply
    • Jack Sparrow

      January 26, 2022

      Ummmm……dude. You do realize that part of resisting fingerprinting is having every single user have the same size browser window, right? If you’re going to resize your window, they you should NOT have resistFingerprinting set to TRUE.

      If you do have resistFingerprinting set to TRUE, then you should NEVER, EVER resize your window for any reason whatsoever. That’s the whole point of resisting fingerprinting! (facepalm)

      Reply
      • drricky

        June 13, 2022

        Looks to me like you’re missing the point. A browser shouldn’t be sending my window size to the server to begin with.

        Reply
      • Charlene

        June 16, 2022

        Well, dumb me just asked that same question as Lucio asked and NO I didn’t realize resistFingerprinting did that. No need for you to be sarcastic to those of us with lesser computer knowledge, thank you very much!

        Reply
  11. Kevin

    January 22, 2022

    If I make these changes in my firefox browser for mac, will they sync with firefox for iOS?

    Reply
  12. Mike

    January 18, 2022

    The people behind the website Privacy Guides (formerly known as Privacy Tools) state there’s no need to configure Firefox desktop using i.e. about:config any more.

    https://privacyguides.org/blog/2021/12/01/firefox-privacy-2021-update/

    Reply
    • Tsu

      May 18, 2022

      My friend, look go to Privacytools.io and go the guides button at top right and read the article about “Jonah Aragon”

      Reply
  13. Mike

    January 12, 2022

    Mozilla, the group behind the Firefox browser, is asking for people’s help in conducting a study called the “Facebook Pixel Hunt” that will analyze Facebook’s “tracking pixels” that track user actions across the internet using a special browser add-on.

    https://gizmodo.com/mozilla-is-going-to-track-facebook-tracking-you-1848338946

    Reply
  14. Private I

    January 11, 2022

    Many of these privacy settings are enabled by default in Firefox 95, but some are not. And
    ‘network.cookie.cookieBehavior’
    now has a value of “5”, which is unexplained here. I performed this test on Mac OS, with all telemetry supposedly disabled, Firefox continually writes to the following telemetry file (the “datareporting” folder within your profile):

    /Users/{username}/Library/Application Support/Firefox/Profiles/{profilename}.default-release/datareporting/glean/db/data.safe.bin

    I presume this information is being transmitted, since there is no reason to log reporting data otherwise. It seems like Brave is more secure in the default configuration, and Firefox really chews up the SSD. Session backups occur every 15 seconds when it should be 15 minutes. Wish there was an easier way to suspend tabs automatically & cache stuff in RAM.

    [https://12bytes.org/articles/tech/the-mozilla-monster/]

    Reply
    • just replying

      January 16, 2022

      There are extensions for unloading tabs such as Unload Tabs and Auto Tab Discard etc..

      Reply
    • BoBeX

      January 17, 2022

      @Private 1: about ‘network.cookie.cookieBehavior’ now has a value of “5”

      I was wondering about this too; I tried to look it up but at first couldn’t find the info.
      When you enquired again I had another look.

      I believe I found a useful resource (this link was supplied on reddit):
      https://developer.mozilla.org/en-US/docs/Web/Privacy/State_Partitioning

      “Dynamic Partitioning

      To prevent JavaScript accessible storage APIs being used for cross-site tracking, Firefox partitions accessible storage by top-level site. This mechanism ieans(sic) that, generally, a third-party embedded in one top-level site cannot access data stored under another top-level site.

      However, unlike Network Partitioning, this boundary is dynamic and access to a third-party’s unpartitioned storage can be granted”

      “Disable Dynamic State Partitioning

      To disable dynamic storage partitioning for all sites you can use the network.cookie.cookieBehavior pref:
      Value Description
      5 Reject (known) trackers and partition third-party storage.
      4 Only reject trackers (Storage partitioning disabled).
      0 Allow all”

      My reading of the document is that FF tries to determine which 3rd party cookies etc are trackers and which are neccessary for web functionality;
      The feature they use to do this is called, “Dynamic Partitioning.”
      If a user wants to switch off Dynamic Partitionaing they can and block all(3rd Party)
      Please read the article yourself, I am a learner.
      If anyone in the RP community has a better resource or better reading please comment.

      Reply
  15. Ykcir

    January 1, 2022

    For the first time in over 10 years FF is not my default browser…been using LibreWolf for a couple months now and using Metager search. More hardened out of the box than FF it still needs some tweaks for more privacy. You have said often don’t install too many addons but I noticed some sites like AT&T really try to track you, with about 82 cookies. 17 Blocks from ClearURL’s, Adblock Ultimate screaming, Decentraleyes plus Privacy Pussum blowing up! Then I chexk out leak test/whats my ip type sites and get no leaks, browsers blocks pretty much all tracking, and I don’t stand out either. Not saying this is good thing to do but it works for me (have 15 addons) To that guy that says his window keeps resizing he should try Default Zoom addon he’ll be okay.

    Reply
    • BoBeX

      January 7, 2022

      Hi @Ykcir,

      I am keenly waiting on a RP LibreWolf review – I believe Sven said somewhere he said this was being considered.

      With the addons, I believe some addons behave in a manner that can leave a signature. For example, have you ever encountered a site that detects that you are using an add-blocker and asks you to white-list their site? If you are using 15 extensions you maybe very unique because not many people are using those same 15 extensions – you maybe very unique.

      The testing sites do not have the resources available to them that the tracking corps have to them;
      Testing is great, I learn a lot from testing, but this is not necessarily proof against well resourced adversaries – it isn’t apples and apples. Do any testing sites test for your extensions?

      I believe this is the basis of the caution against many addons.

      Can they detect your extensions? I believe they can (not all).
      Using many extensions to block trackers? I believe this may make you more unique.

      I am very keen for a LibreWolf review;
      Though I believe hypervisors are the only answer.

      Reply
      • Ykcir

        January 12, 2022

        If you go to ip check at Jondo you really get to see what is showing on your browser to trackers, and there I do pretty good. Actually I been using FF hardening guides from Github, and make sure to read the ENTIRE guide, as there will be some good tips near the bottom. Check out any addons before installing them, and some don’t allow in private browsing mode. One thing I do like about LibreWolf is they don’t all the millions of updates like FF, because FF uses some of those updates to increase telemetry or some other form of tracking ( like activity history…thats part of a secure browser? ). Anyway I stand out as 1 in 8 browsera which is probaly about normal.
        And on Youtube yes there are issues but I never allow cookies from them, just copy the URL’s and download the video or content from other apps or browsers.

        Reply
    • Jacob B.

      January 10, 2022

      You know I tried LibreWolf for awhile it’s a great browser but I was having some issues with YouTube where videos 720p and above would drop massive amounts of frames (seen under “stats for nerds”. This doesn’t happen on Brave, or Firefox… not exactly sure what that is all about but since I spend a lot of time on YouTube this was pretty depressing.

      Reply
  16. Mike

    January 1, 2022

    An interesting effort known as Arkenfox has been undertaken for a little over a year to make enhancements to Firefox using a user .js template in order to configure and harden the browser.

    I am unsure how far along this project is and checked Firefox’s add-on repository. So far there is nothing that I can see or find out that has been produced. This may be in the early Beta or testing stages.

    https://github.com/arkenfox/user.js

    Reply
    • BoBeX

      January 7, 2022

      @Mike a very interesting read. You helped on my years resolution: to learn JS this year.

      Reply
    • Duck

      January 22, 2022

      It’s aeons old, and up to date. You could hardly call it anything but mature.

      Reply
    • Duck

      January 22, 2022

      The JS file itself is the “product”, it’s a set of about:config tweaks that are expected to be used with a few recommended add-ons to shield the user from fingerprinting and other tracking methods including vendor telemetry.

      Though above all, it’s a comprehensive repository of Firefox about:config flags related to privacy and security. It’s the best the web has to offer on that front.

      Reply
  17. Android user

    December 29, 2021

    About:config doesn’t work for the Firefox on Android. What’s the workaround?

    Reply
    • Sven Taylor

      December 29, 2021

      See the secure browser guide for different options on mobile devices.

      Reply
    • glix

      January 8, 2022

      https://github.com/fork-maintainers/iceraven-browser

      Reply
    • Duck

      January 22, 2022

      On Android, use uBlock Origin Firefox add-on and set it to block 3rd parties and disable JS by default. Use a device firewall to ban Mozilla adresses you’d rather not let Firefox use, but make sure you keep the fox updated manually and don’t fall behind the pace if you do.

      I’m hoping RethinkDNS (an Android firewall) will soon let us ban domain names rather than inconvenient IPs only though.

      Reply
  18. Dennis

    December 28, 2021

    I have a question about browser add-ons. How can they be considered to enhance privacy and security when some of the permissions accepted upon adding it give up your privacy.

    For example, in order to add-on uBlock Origin you grant them permission to “Access your data for all websites”, which allows them to read the content of any web page you visit as well as data you enter into those web pages, such as usernames and passwords.

    While I’m for blocking ads, how is this add-on not potentially compromising your privacy and security from the permission granted?

    Many of the add-ons/extensions from the EFF also contain permissions that I believe compromise privacy.

    Any insight would be welcome.

    Reply
    • George from Canada

      December 29, 2021

      Hi Dennis,
      I believe the simple answer to your very valid question is: Trust.
      Do you trust EFF? uBlock’s creator? And others… or don’t you?
      If the answer is “no” to trusting them, I recommend not using the internet for anything!
      Nothing wrong with that choice, IMO. Life was okay B4 the internet was created!!!
      Cheers, George

      Reply
    • BoBeX

      January 7, 2022

      Hi @Dennis,

      I believe you are asking the right questions. It is a very good question.

      I recently went through Sven’s guide for Android:
      https://restoreprivacy.com/secure-android-privacy/
      And it was a good lesson for me on allowing permissions – be it extensions or apps.

      @George from Canada’s (GFC) reply was a very good one. I would add that Ublock Origin is open source and recommended by Mozilla; this point is only extends the previous remarks by @GFC on trust; and adds a suggestion on how to form a ‘trusting’ point of view. With open source the trust is audited and distributed.

      Reply
  19. BoBeX

    December 24, 2021

    Hi Sven and RP Community,

    I have found a solution to this fingerprinting problem. Unfortunately, I have found someone who has the solution, an has commercialised it for unethical purposes (my opinion).
    https://multilogin.com/use-cases/affiliate-marketing/

    It may point the way however for an open source, privacy community driven solution. They claim to have a solution that defeats Google and Facebook. My mind is that, if their claims are true, that this is a solidly tested solution; if Google and Facebook can’t detect them that is a solid test; that is, if what they promise is true. I feel the implementation is unethical, which makes it hard for me to trust them; but it looks like they provide a solution and have commercialised it. They are a small organisation which makes me feel it is possible for open source.

    Regards,

    BoBeX

    Reply
  20. Raj

    December 22, 2021

    Just a caveat. I’ve been using the modified FF with the above settings for a few years now.

    Firefox’s behaviour is a bit annoying as a result of these settings. For example, I’m unable to keep my resized FF window. It always resorts to a particular size and there’s nothing I can do to permanently change it. I don’t have this issue with Chrome or any other browser.

    The only solution is to remove FF completely and use a new FF account to sync too after reinstalling and then resizing your FF window to how you like. Should you change the size of the FF window in the future, it won’t stay and you’ll have to manually resize the window each time you open FF.

    Reply
    • glix

      December 23, 2021

      If you mean custom zoom levels on a site by site basis, you can keep privacy.resistFingerprinting as “true” and use the CanvasBlocker add-on, which I gather is not quite as good as the about:config setting, but as far as I can tell it will give you some protection and you won’t go crazy readjusting your zoom levels every time you visit your favourite websites (again, if I understand you correctly :-)).

      Reply
      • Raj

        December 24, 2021

        No. That’s not what I mean. Zooming is not the issue. Resizing FF’s window is. I can’t resize FF’s window and make it stay unless I uninstall and reinstall it (IF I DONT SYNC my account).

        As soon as I open up FF I can see my resized window for a split second and then it’s resized automatically to a much smaller and unusable size. I am now using third party windows resizer that starts up with Windows as a workaround.

        Reply
      • Will

        December 24, 2021

        Raj:

        The problem you’re experiencing is related to fingerprinting.

        Type in the address bar “about:config” (no quotes) and press Enter. Promise to be careful when prompted.

        Type in the search bar and look for the preference :
        privacy.resistFingerprinting

        Set the value to FALSE.

        You will lose fingerprinting so it’s a trade-off.

        I hope the above helps.

        Reply
      • glix

        December 25, 2021

        Ok, duh, I meant false. Getting old and senile. Listen to Will.

        Reply
    • Will

      December 24, 2021

      The problem is to do with fingerprinting which .

      Type in the search bar and look for the preference :privacy.resistFingerprinting

      Change the setting from TRUE to FALSE. However, you will lose the privacy setting and fingerprinting will be allowed. I hope this helps.

      Reply
  21. Harry

    December 20, 2021

    Is there ANY way to disable a website to know you’re using a VPN? For instance, on deviceinfodotme it shows many things including the graphics card you’re using. Tweaking FF prevents a lot but doesn’t prevent the website from recognizing you’re using a VPN. I think only a torbrowser can (in most situations).

    Reply
    • Bronco

      December 21, 2021

      In my experience, you can’t “fool” any serious website to block you if they want. No VPN can help you here. You can watch TVs if you pay, they’ll let you that. But not much else. The only real good of VPN is that you reduce the number of trackers online, and that is OK.

      Reply
    • BoBeX

      December 23, 2021

      @Harry I found your question interesting so I looked into it. I don’t use NordVPN but looked in NordVPN’s documentation as NordVPN is Sven’s top recommended.
      It appears that NordVPN promises that you can avoid being blacklisted for using a VPN by using a service they provide called “Dedicated IP” It is an extra cost and I don’t know how frequently they let you change the static IP. Maybe a NordVPN user of this service could give a recommendation of it’s effectiveness. I believe you can toggle easily between Shared IPs for privacy and a Dedicated IP as required.
      https://nordvpn.com/features/dedicated-ip/

      Reply
  22. BoBeX

    December 19, 2021

    Hi Sven,

    Fantastic article thanks for the update.
    Your guide is so thoroughly thought through and well designed in that it caters to all readers interested in privacy. It can a simple how to guide or an in-depth resource with a trove of information.
    Thank you for all the research you do and share, and thank you for constructing your articles so well.

    The easiest way for me to implement your advice is to uninstall / reinstall Firefox. This is what I intend to do.

    Question: Thinking of the “Restore Privacy Logo,” there is a symbol in it. Is it a fingerprint?

    Regards,

    BoBeX

    Reply
    • Sven Taylor

      December 19, 2021

      Yep, that’s a fingerprint in the logo. Thanks

      Reply
  23. glix

    December 17, 2021

    These are all the security plugins I currently have on FF. I’m pretty sure this is overkill! Can anyone tell me which of these aren’t needed anymore?

    CanvasBlocker (used because privacy.resistFingerprinting=true messes up zoom levels on different web pages)
    Chameleon
    ClearURLs
    Cookie AutoDelete (probably not needed if following Sven’s cookie instructions?)
    Javascript Control (only there because it’s easier to control than with ublock)
    LocalCDN
    Privacy Possum
    uBlock Origin (I’m not getting rid of this one!)

    Also, can addons/plugins be seen if they’ve been disabled?

    Reply
    • glix

      December 19, 2021

      To answer my own question (and please tell me if you disagree), ClearURLs is not necessary if you add “Actually Legitimate URL Shortener Tool” to uBlock Origin (Settings>Filter Lists>Custom>Import>Paste in “https://raw.githubusercontent.com/DandelionSprout/adfilt/master/LegitimateURLShortener-AffiliateTagAllowlist.txt”).

      I’m assuming that CookieAutoDelete is not needed if Sven’s cookie rules are followed. Privacy Possum has not been updated in two years! That leaves Chameleon and LocalCDN. Chameleon is nice, but I find it kind of confusing because it does many different things. Also, I don’t really know what I’m doing 🙁

      Reply
      • George from Canada

        December 21, 2021

        glix! That you wrote: “Also, I don’t really know what I’m doing” puts you in the driver-seat to learn!!! But there is no easy way to get an overall understanding without diving in, making mistakes and then learning from them! Best of luck on your journey into this fascinating field of modern technology! Cheers, George
        P.S. And avail yourself HEAVILY of this websites articles. I did and continue to do so! And if I can get it… so can you!!!

        Reply
    • George from Canada

      December 20, 2021

      Hey glix!
      Found this site that may be helpful in, at least in part, answering your questions:
      https://github.com/arkenfox/user.js/wiki/4.1-Extensions
      The issue of redundancy is, IMO, a ‘purist’ geek thing. Example: I use Privacy Badger & Privacy Possum in addition to the built in Fire-Fox protections. All of them do something slightly different as shown when you click on PB and PP. A geek would probably say ‘redundant’. So what?
      I have uBlock Origin installed on Brave. Brave is brilliant in blocking ads but every once in a while uBlock will catch something Brave missed. I’m good with that!
      “Also, can addons/plugins be seen if they’ve been disabled?” By you, of course; by others, unlikely. But if you are worried about this, simply remove. They all can be reinstalled at a later date.

      Cheers, George

      Reply
      • Bronco

        December 21, 2021

        In my experience, you can’t “fool” any serious website to block you if they want. No VPN can help you here. You can watch TVs if you pay, they’ll let you that. But not much else. The only real good of VPN is that you reduce the number of trackers online, and that is OK.

        Reply
      • Private I

        January 11, 2022

        I have uBlock Origin installed on Brave. Brave is brilliant in blocking ads but every once in a while uBlock will catch something Brave missed.

        I believe that Brave integrates Ublock, and you can control the filter list here:
        brave://adblock/
        ___
        https://www.ghacks.net/2021/02/10/brave-browser-adds-native-support-for-ublock-and-fanboy-annoyances-lists-and-social-list/

        Maybe you have Brave Rewards enabled so you are seeing the privacy-protecting ads?

        Reply
        • Suplex

          January 23, 2022

          Aw come on with the misleaded hype, it’s a bit too frequent with that browser for some reason. Brave doesn’t include uBlock Origin, uBO is a add-on way more powerful and flexible than built in functionality of any browser. Brave just includes a list of things to block named uBlock, it’s a completely different thing.

          One could install uBO in Brave and other tweaked Google/Microsoft Chromium browsers, but it’s most powerful in Firefox as the author details here:
          https://github.com/gorhill/uBlock/wiki/uBlock-Origin-works-best-on-Firefox

  24. John

    December 16, 2021

    Sadly, I was a long-time Firefox user, but I ditched it because of the automatically disabled FVD Speed Dial plugin, where was the collection of my websites which I can’t remember if I use it separately. Yes, the Firefox decision was about violating privacy, but still…
    So, now I using Brave which has not disabled this plugin (yet…)

    Reply
  25. Roberto

    December 16, 2021

    How about Librewolf a rebuild of Firefox 95 with changes to improve security and privacy? 
    The project is being developed by a community of enthusiasts for most platforms (even the new Pi4-64 desktop).  The portable versions offer improved local security. https://gitlab.com/librewolf-community/browser

    Top privacy rated Mullvad VPN offers integrated solutions for the DNS over HTTPS issues Sven wisely raises. https://mullvad.net/en/help/dns-over-https-and-dns-over-tls/

    In Ublock Origin disable ‘Uncloak canonical names’ to prevent DNS leaks. https://mullvad.net/en/check/

    Reply
    • Sven Taylor

      December 16, 2021

      Hi Roberto, we’ll check out Librewolf in the coming months – it looks like a good project.

      Reply
      • George from Canada

        December 16, 2021

        Hey Sven! Great idea to check out/review Librewolf!!! I installed it on my Mac Power Book (Catalina) and also on the 2 Linux distros (Pop OS and Mint) running on 2 other computers I have on the go. Am transitioning over to Linux as I, along with a lot of other Mac users, am fed up with the corporate restrictions they continue to heap up on their consumers = too many “can’t dos” and the “our way or the highway” attitude.
        That said (and I’ve been with Mac since the cathode-ray tube iMac days!!!) I find Mac hardware to be rather robust. The above mentioned distros installed well and run beautifully!
        But back to Librewolf. Love modified FireFox, but you can do the same mods with Librewolf via about:config. Interestingly enough, about 50% of the mods you have suggested in the past are already implemented right out-of-the-gate.
        Anyways… look forward to get you take on that browser, and would not be surprised if it ended up on your recommended browser list!
        Cheers, George
        P.S. Don’t know if it can be installed on “Windoze”.

        Reply
        • Sven Taylor

          December 16, 2021

          Thanks for the feedback George.

    • Mike

      December 17, 2021

      @Roberto & @Sven please keep in mind that, like unGoogled Chromium, people have to manually update LibreWolf and any add-ons or extensions they use. This can be especially cumbersome for users who are not as technically adept. That is mainly why I suggest Ghostery’s browser over LibreWolf for people looking for an alternative to Firefox.

      Reply
      • Sven Taylor

        December 17, 2021

        Excellent points, Mike, thanks for sharing.

        Reply
      • Roberto

        December 17, 2021

        Being familiar with Ghosterys checkered past, I did some research to assist readers in comparing the two browsers.
        Ghostery’s new owners have developed a browser called Dawn. Subscribers can install Firefox extensions. For $3.99/month they ‘gain Complete Privacy Protection’ https://www.ghostery.com/pricing

        However Ghostery privacy policy labors to state otherwise: ‘Ghostery Dawn also collects pings regarding browser settings, such as whether Dawn is set as the default browser, which search provider is set as the default search option, number of add-ons, and other non-personal data. … We collect on an ongoing basis the following data: web browser; operating systems; language; GPP being used; opt-in settings to share Tracker information with the Company; when an installation, upgrade, or uninstallation occurs; whether the extension or application is active, engaged, or logged-in by you (and associated frequency), and other product-specific telemetry for basic actions or settings. We also COLLECT PINGS regarding attribution of our own internal MARKETING efforts and basic Ghostery SUBSCRIPTION INFORMATION such as what interval subscription is detected.’ https://www.ghostery.com/privacy/ghostery-plans-and-products-privacy-policy
        Why pay to be analyzed and tracked?

        LibreWolf Privacy Policy ‘One of the goals of LibreWolf is to remove the data collection and telemetry from Firefox, and thus we don’t collect any data from the user in the LibreWolf browser or on the LibreWolf website. Additionally, we wouldn’t even have the infrastructure to collect and store data, making it impossible from a technical standpoint.
        We can’t always assure that no data is sent from the browser to Mozilla or other third parties, but we try our best to achieve that.’ https://librewolf.net/privacy-policy/

        Firefox releases are widely publicized every six weeks. As Librewolf builds are largely automated, expect their releases to soon follow. For the portable release, simple unpack into the previous release directory.

        P.S. Thanks for not having that dreaded bouncer-Captcha!

        Reply
        • Mike

          December 18, 2021

          @Roberto I kindly refer you to section 13 where it says (in part):

          “The Company has reasonable and appropriate technical, physical and administrative safeguards in place for a company of our size and complexity to protect the data that is collected. Some of the specific security measures we take include instantly hashing the origination IP addresses using very strong encryption technology to protect your privacy, whereupon the collected IP addresses and user agent information is destroyed. In addition, to further preserve your security, the GPP do not collect any information on URLs beyond the path query string.”

          Ghostery is being transparent about what they are doing and most of the language is when someone opens an account. So when you download Ghostery Dawn, don’t buy their products (like an extension subscription). Case closed.

    • Private I

      January 11, 2022

      In Ublock Origin disable ‘Uncloak canonical names’ to prevent DNS leaks. https://mullvad.net/en/check/

      Thanks for the tip. I realized that Cloudflare DNS/DoH was still enabled in the router when I saw a half-dozen servers in the test after changing this Ublock setting. If the router is configured to proxy everything through a VPN, and DoH is disabled, it uses the DNS provided by the VPN service. If you are not using Mullvad DNS, the test will still indicate a “leak”, but only 1 “leak” is shown (which is the DNS provided by the VPN, so not a real leak.) You can confirm this at https://dnsleaktest.com/

      Reply
  26. Lena

    December 15, 2021

    Great information and thanks for the update! I love this webiste, so many great tips and tricks.

    Reply
  27. m

    December 15, 2021

    There is also great extension Firefox Multi-Account Containers. One compartment for google products, one for Amazon and so on 🙂

    Reply
    • Private I

      January 11, 2022

      Brave has a similar feature — it allows you to have multiple profiles with different extensions open simultaneously, and distinguishes them by changing the window background color. You can easily open one of your other profiles from the profile switcher menu on the right side. Its not identical to Firefox containers but is better integrated and does not require an extension. If you wanted to stay logged into a site but did not want to risk any cross-site tracking, or did not want an extension to have access to every site, you could create a separate profile and whitelist the site in Cookie Autodelete.

      “In some ways this is actually better than FF + Containers.”
      https://community.brave.com/t/equivalent-of-multi-account-containers-or-temporary-containers-extension-ff/135573/13

      Reply
  28. Mike

    December 14, 2021

    The enhanced ad and script blocker UMatrix has been discontinued.

    https://alternativeto.net/software/umatrix/about/

    Reply
    • Sven Taylor

      December 14, 2021

      Oh wow, thanks for the update Mike.

      Reply
  29. Tombfyre

    December 12, 2021

    Didn’t find this before.
    webgl.disabled seems to break the receiving of video in the web version of Zoom.

    Reply
  30. OneFortyFour

    November 30, 2021

    Don’t make dom.event.clipboardevents.enabled = false if you want copy and paste to function in google sheets and possibly google docs.

    Reply
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