# uBlock Origin in Safest Mode
**URL:** https://forum.torproject.org/t/ublock-origin-in-safest-mode/11009
**Category:** Tor Browser Desktop
**Tags:** anti-censorship, tor-browser
**Created:** [January 7, 2024, 2:04pm UTC](https://forum.torproject.org/t/ublock-origin-in-safest-mode/11009 "2024-01-07T14:04:34Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Ralph1806](https://forum.torproject.org/u/Ralph1806)
#### Post date: [January 7, 2024, 2:04pm UTC](https://forum.torproject.org/t/ublock-origin-in-safest-mode/11009/1 "2024-01-07T14:04:34Z")
Hi, I know that this is a common discussion amongst new users of the TOR Browser, but I want to know whether there is any disadvantage to adding uBO to the TOR Browser on Windows/Android if it is set on Safest settings, so as to block any adds on websites we choose to systematically whitelist on NoScript?
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### Author:  [@FranklyFlawless](https://forum.torproject.org/u/FranklyFlawless)
#### Post date: [January 7, 2024, 11:40pm UTC](https://forum.torproject.org/t/ublock-origin-in-safest-mode/11009/2 "2024-01-07T23:40:15Z")
Yes, it could affect your browser fingerprint and deanonymize you.
> **[How can we help? | Tor Project | Support](https://support.torproject.org/#faq_faq-3)**
>
> Defend yourself against tracking and surveillance. Circumvent censorship. | How can we help?
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### Author:  [@Ralph1806](https://forum.torproject.org/u/Ralph1806)
#### Post date: [January 8, 2024, 11:23am UTC](https://forum.torproject.org/t/ublock-origin-in-safest-mode/11009/3 "2024-01-08T11:23:47Z")
Thank you. Just to clarify though, in Safest mode most websites wouldn’t be able to detect an adblocker yes? And whitelisted domains would only be domains that I trust (such as this forum). Are there ways to deanonymize a user with an adblocker even if they use Safest settings?
Also, is there any link to updates on when uBlock Origin will be added to the TOR Browser by default?
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### Author:  [@thorin](https://forum.torproject.org/u/thorin)
#### Post date: [January 8, 2024, 12:35pm UTC](https://forum.torproject.org/t/ublock-origin-in-safest-mode/11009/4 "2024-01-08T12:35:47Z")
> [@Ralph1806](#):
>
> in Safest mode most websites wouldn’t be able to detect an adblocker yes?
In Safest mode you wouldn’t even get ads served on most sites, period!
IANAE but server side they can still detect if you were sent an ad - either from their first party or in cahoots with a third party - yes, sites share data and talk about you behind your back 🙂
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### Author:  [@FranklyFlawless](https://forum.torproject.org/u/FranklyFlawless)
#### Post date: [January 9, 2024, 2:01am UTC](https://forum.torproject.org/t/ublock-origin-in-safest-mode/11009/5 "2024-01-09T02:01:00Z")
> [@Ralph1806](#):
>
> Just to clarify though, in Safest mode most websites wouldn’t be able to detect an adblocker yes?
I am not well researched on adblocking detection against the Tor Browser, as I do not install any extensions for the various reasons provided in my above post.
> [@Ralph1806](#):
>
> Are there ways to deanonymize a user with an adblocker even if they use Safest settings?
Yes, JavaScript is only one attack vector. Here is a demo that is able to generate a browser fingerprint without it:
> **[No-JS fingerprinting](https://noscriptfingerprint.com/)**
>
> This demo illustrates that fingerprinting is possible even without JavaScript and cookies
> [@Ralph1806](#):
>
> Also, is there any link to updates on when uBlock Origin will be added to the TOR Browser by default?
Nothing concrete, but there is a GitLab issue to keep track of its potential inclusion:
> **[harden uBO against fingerprinting (#164) · Issues · The Tor Project /...](https://gitlab.torproject.org/tpo/applications/mullvad-browser/-/issues/164)**
>
> update: https://gitlab.torproject.org/tpo/applications/team/-/wikis/Goteburg-2023-Meeting-Notes/ublock-origin What is the purpose for including uBO? IDK. Why did Tails do it? reduce network traffic /...
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### Author:  [@system](https://forum.torproject.org/u/system)
#### Post date: [January 10, 2024, 5:45am UTC](https://forum.torproject.org/t/ublock-origin-in-safest-mode/11009/6 "2024-01-10T05:45:16Z")
This topic was automatically closed 24 hours after the last reply. New replies are no longer allowed.
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### Author:  [@Ralph1806](https://forum.torproject.org/u/Ralph1806)
#### Post date: [January 10, 2024, 7:26am UTC](https://forum.torproject.org/t/ublock-origin-in-safest-mode/11009/7 "2024-01-10T07:26:04Z")
Thank you.