Just like to know just in case some would like to have adblock functionalities on their Tor browsers.

Yes I know that adding this add-on will make a Tor browser appears more unique as it will add to the browser fingerprinting.

And it will require a constant look out for Tails OS update changelog for any Adblock plus updates and change the add-on's configuration accordingly. For such configuration updates might disrupt the fake Tails OS fingerprint.

For those who want to add such functionalities please be mindful of these.

At least by using Adblock Plus instead of, for example, Ublock Origins might help to blend in with other Tails users.

1 Answer 1


Update: Tails no longer uses AdBlock Plus, it has moved to uBlock Origin. The information here is no longer valid.

It's actually the one pulled from the debian repos, xul-ext-adblock-plus, as per config/chroot_local-hooks/10-tbb

config/chroot_local-includes/etc/tor-browser/profile/preferences/0000tails.js sets some further preferences too:

// Adblock Plus preferences
pref("extensions.adblockplus.correctTypos", false);
pref("extensions.adblockplus.currentVersion", "2.6.6");
pref("extensions.adblockplus.savestats", false);
pref("extensions.adblockplus.showinaddonbar", false);
pref("extensions.adblockplus.showintoolbar", false);
pref("extensions.adblockplus.subscriptions_autoupdate", false);

And the patterns that it uses are available in config/chroot_local-includes/etc/tor-browser/profile/adblockplus/patterns.ini

  • Great answer! Although do you mind explaining in your answer on how a Tor user with ABP configured like in Tails OS will still be distinguishable? What are the other fingerprintable factors that I have missed out? Commented Sep 3, 2016 at 5:15
  • 1
    @m894v5n74v539nm8 hmmm, it looks like the concrete example that I'd seen for detecting Tails vs Tor Browser was relying purely on adblock (github.com/jonaslejon/tor-fingerprint) and can't distinguish Tor Browser + ABP from Tails. While I can't rule out that there are distinguishers, I don't currently know what they are, I'm going to remove that from my answer till I can cite something solid.
    – cacahuatl
    Commented Sep 4, 2016 at 1:13

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