# \#fingerprinting **URL:** https://forum.torproject.org/tag/fingerprinting/14.md [Latest](https://forum.torproject.org/latest.md) · [Categories](https://forum.torproject.org/categories.md) · [Tags](https://forum.torproject.org/tags.md) --- ## [Feedback on Tor Browser Window Size Issue](https://forum.torproject.org/t/feedback-on-tor-browser-window-size-issue/21624)
**Author:** [@Jack1](https://forum.torproject.org/u/Jack1)\ **Replies:** 3\ **Last updated:** [May 20, 2026, 1:49pm UTC](https://forum.torproject.org/t/feedback-on-tor-browser-window-size-issue/21624 "2026-05-20T13:49:12Z")
I would like to report an issue regarding the initial window size of the Tor Browser. I have updated to the latest version (15.0.14 for Apple Silicon) as of UTC 2026-05-20. My computer screen has sufficient space to disp… --- ## [Use of commercial fingerprinting libraries in Tor Browser testing?](https://forum.torproject.org/t/use-of-commercial-fingerprinting-libraries-in-tor-browser-testing/21552)
**Author:** [@Noino](https://forum.torproject.org/u/Noino)\ **Replies:** 6\ **Last updated:** [May 8, 2026, 7:47am UTC](https://forum.torproject.org/t/use-of-commercial-fingerprinting-libraries-in-tor-browser-testing/21552 "2026-05-08T07:47:40Z")
Should Tor Browser users expect Tor Browser to be resistant to commercial grade fingerprinting code and to what extent does the Tor Project use such libraries in testing Tor Browser’s resistance to fingerprinting? For e… --- ## [Paper on success of website fingerprinting attacks against Tor under realistic, open-world conditions](https://forum.torproject.org/t/paper-on-success-of-website-fingerprinting-attacks-against-tor-under-realistic-open-world-conditions/21524)
**Author:** [@lars-skuggi](https://forum.torproject.org/u/lars-skuggi)\ **Replies:** 3\ **Last updated:** [May 8, 2026, 2:23am UTC](https://forum.torproject.org/t/paper-on-success-of-website-fingerprinting-attacks-against-tor-under-realistic-open-world-conditions/21524 "2026-05-08T02:23:53Z")
The paper revisits website fingerprinting (WF) attacks against Tor under realistic, open-world conditions. Instead of relying on idealized lab datasets, the authors collect a large-scale dataset (800k+ traces) from a re… --- ## [Tor Browser vulnerable to fingerprinting methods](https://forum.torproject.org/t/tor-browser-vulnerable-to-fingerprinting-methods/21499)
**Author:** [@victor](https://forum.torproject.org/u/victor)\ **Replies:** 4\ **Last updated:** [April 27, 2026, 8:17am UTC](https://forum.torproject.org/t/tor-browser-vulnerable-to-fingerprinting-methods/21499 "2026-04-27T08:17:56Z")
i put together a demo site: https://tb-fingerprinting.tiiny.site/ even when safer mode is on (which blocks wasm and jit), the site still leaks too much info. it can still figure out things like: your mouse polling rat… --- ## [Understanding font fingerprinting](https://forum.torproject.org/t/understanding-font-fingerprinting/21260)
**Author:** [@Noino](https://forum.torproject.org/u/Noino)\ **Replies:** 13\ **Last updated:** [February 26, 2026, 11:09am UTC](https://forum.torproject.org/t/understanding-font-fingerprinting/21260 "2026-02-26T11:09:14Z")
In testing the new alpha release (16.0a3) I’ve noticed that the font fingerprint metrics and fingerprint from BrowserLeaks’ font fingerprinting test have changed from 16.0a2. I know this can happen periodically due to va… --- ## [Win10 DPI Scaling changes Fingerprint](https://forum.torproject.org/t/win10-dpi-scaling-changes-fingerprint/21278)
**Author:** [@tiyih](https://forum.torproject.org/u/tiyih)\ **Replies:** 0\ **Last updated:** [February 24, 2026, 8:59am UTC](https://forum.torproject.org/t/win10-dpi-scaling-changes-fingerprint/21278 "2026-02-24T08:59:50Z")
due to what i presume is windows 10 dpi scaling settings i have set, Tor Browser’s default window size and fullscreen size on my 1920x1080 screen have an irregular reported screen size. this causes fingerprinting test… --- ## [Audio Fingerprinting Not Blocked - Matches Firefox](https://forum.torproject.org/t/audio-fingerprinting-not-blocked-matches-firefox/21242)
**Author:** [@AmongTong](https://forum.torproject.org/u/AmongTong)\ **Replies:** 1\ **Last updated:** [February 16, 2026, 5:41am UTC](https://forum.torproject.org/t/audio-fingerprinting-not-blocked-matches-firefox/21242 "2026-02-16T05:41:43Z")
Tor Browser is supposed to be blocking the Web Audio API, to block Audio Context fingerprinting. However Audio Fingerprint Test - Detect Browser Audio Processing Capabilities is showing a fingerprint value. This finger… --- ## [Fingerprint.com recognises me even through Tor Browser](https://forum.torproject.org/t/fingerprint-com-recognises-me-even-through-tor-browser/21082)
**Author:** [@torUser4](https://forum.torproject.org/u/torUser4)\ **Replies:** 3\ **Last updated:** [January 17, 2026, 4:49pm UTC](https://forum.torproject.org/t/fingerprint-com-recognises-me-even-through-tor-browser/21082 "2026-01-17T16:49:56Z")
Hello, I am using a smartphone pixel 8 with GrapheneOS for optimised privacy. Recently I cam across the company / their website fingerprint.com As soon as you visit their website there detection-system tries to identi… --- ## [Why doesn't Tor Browser ship with UBlock origin?](https://forum.torproject.org/t/why-doesnt-tor-browser-ship-with-ublock-origin/21055)
**Author:** [@carbonarawarriorr](https://forum.torproject.org/u/carbonarawarriorr)\ **Replies:** 2\ **Last updated:** [January 10, 2026, 10:07pm UTC](https://forum.torproject.org/t/why-doesnt-tor-browser-ship-with-ublock-origin/21055 "2026-01-10T22:07:11Z")
So I just switched from Firefox to Mullvad Browser because of the recent AI drama, and I was a little surprised to see that it comes shipped with UBlock. I know that the reason it’s not recommended to install extensions … --- ## [Maybe we can set letterboxing at one value: 1920\*1080](https://forum.torproject.org/t/maybe-we-can-set-letterboxing-at-one-value-1920-1080/20920)
**Author:** [@anon22764326](https://forum.torproject.org/u/anon22764326)\ **Replies:** 0\ **Last updated:** [December 10, 2025, 2:49pm UTC](https://forum.torproject.org/t/maybe-we-can-set-letterboxing-at-one-value-1920-1080/20920 "2025-12-10T14:49:27Z")
Traditional letterboxing is setting resolution as an integer multiple of 100. However, considering that there are very few types of physical resolution values, when going to full screen, even if it is set to an integer … --- ## [Tor Browser and browser fingerprint](https://forum.torproject.org/t/tor-browser-and-browser-fingerprint/20882)
**Author:** [@User25](https://forum.torproject.org/u/User25)\ **Replies:** 4\ **Last updated:** [December 1, 2025, 2:46pm UTC](https://forum.torproject.org/t/tor-browser-and-browser-fingerprint/20882 "2025-12-01T14:46:32Z")
If you visit this site My Fingerprint- Am I Unique ? through your Tor browser, you will be surprised to learn that Yes! You are unique among the 46… fingerprints in our entire dataset. It doesn’t matter to me, but many p… --- ## [uBlock Origin integration with Tor Browser](https://forum.torproject.org/t/ublock-origin-integration-with-tor-browser/19078)
**Author:** [@Deepth-Haze](https://forum.torproject.org/u/Deepth-Haze)\ **Replies:** 2\ **Last updated:** [October 1, 2025, 11:10am UTC](https://forum.torproject.org/t/ublock-origin-integration-with-tor-browser/19078 "2025-10-01T11:10:13Z")
Operating System : Windows 11 Browser Version : 14.5.2 Security Level Used : Block All Scripts Extensions Used : Ublock origin Website Visited:Starpage Search Image : Showcasing Ublock Origin Website Visited: Br… --- ## [Why website display stripes?](https://forum.torproject.org/t/why-website-display-stripes/18281)
**Author:** [@anon22764326](https://forum.torproject.org/u/anon22764326)\ **Replies:** 1\ **Last updated:** [April 8, 2025, 9:47am UTC](https://forum.torproject.org/t/why-website-display-stripes/18281 "2025-04-08T09:47:04Z")
Look at this image, there are a lot of green stripes in the web page display. Why does this happen? How to solve it? --- ## [Tor browser is leaking my Country](https://forum.torproject.org/t/tor-browser-is-leaking-my-country/18064)
**Author:** [@carrot](https://forum.torproject.org/u/carrot)\ **Replies:** 9\ **Last updated:** [March 25, 2025, 7:14pm UTC](https://forum.torproject.org/t/tor-browser-is-leaking-my-country/18064 "2025-03-25T19:14:01Z")
I use DuckDuckGo on the Tor browser, and my search results include content specific to my country. I’m from a non-English speaking country, and the results even show content in my local language. I don’t think DDG would … --- ## [Click "block" or ignore website's requesting for HTML5 canvas data?](https://forum.torproject.org/t/click-block-or-ignore-websites-requesting-for-html5-canvas-data/17987)
**Author:** [@anon22764326](https://forum.torproject.org/u/anon22764326)\ **Replies:** 5\ **Last updated:** [March 21, 2025, 7:41pm UTC](https://forum.torproject.org/t/click-block-or-ignore-websites-requesting-for-html5-canvas-data/17987 "2025-03-21T19:41:07Z")
As we can see this image, a website is trying to use html5 canvas data to identify computers. So which one is the best choice? A. just ignore this notification B. click “block” C.(I don’t think we should click all… --- ## [Why a site could know me from one tab to another](https://forum.torproject.org/t/why-a-site-could-know-me-from-one-tab-to-another/16605)
**Author:** [@reza](https://forum.torproject.org/u/reza)\ **Replies:** 3\ **Last updated:** [January 4, 2025, 2:32pm UTC](https://forum.torproject.org/t/why-a-site-could-know-me-from-one-tab-to-another/16605 "2025-01-04T14:32:54Z")
I opened one site in two tabs. According what I read in about:manual I understand that the site couldn’t know that both of the requests are from me, but when I changed the site to dark mode in one of the tabs and reload … --- ## [How credible is "imagine" on the TorPlusVPN page?](https://forum.torproject.org/t/how-credible-is-imagine-on-the-torplusvpn-page/16079)
**Author:** [@5Oj0mZDRarEO](https://forum.torproject.org/u/5Oj0mZDRarEO)\ **Replies:** 1\ **Last updated:** [December 1, 2024, 10:42am UTC](https://forum.torproject.org/t/how-credible-is-imagine-on-the-torplusvpn-page/16079 "2024-12-01T10:42:21Z")
How credible is “imagine” on the TorPlusVPN page? it’s not difficult to imagine, that also encrypted Tor traffic hidden by a VPN’s or SSH’s could be classified. Should I treat it as “imagine by a credible expert” or … --- ## [Fingerprintability of SmoothScroll in Tor Browser](https://forum.torproject.org/t/fingerprintability-of-smoothscroll-in-tor-browser/15372)
**Author:** [@d.haman](https://forum.torproject.org/u/d.haman)\ **Replies:** 5\ **Last updated:** [October 24, 2024, 11:41am UTC](https://forum.torproject.org/t/fingerprintability-of-smoothscroll-in-tor-browser/15372 "2024-10-24T11:41:13Z")
Thanks for everything. I understand this may be a difficult ask but is there any alternative to the smooth-scrolling behavior while not being a fingerprinting vector? Some people find the default smooth-scrolling behavio… --- ## [Problem in the images that I download or try to upload somewhere](https://forum.torproject.org/t/problem-in-the-images-that-i-download-or-try-to-upload-somewhere/15075)
**Author:** [@SRV](https://forum.torproject.org/u/SRV)\ **Replies:** 6\ **Last updated:** [October 9, 2024, 2:12pm UTC](https://forum.torproject.org/t/problem-in-the-images-that-i-download-or-try-to-upload-somewhere/15075 "2024-10-09T14:12:36Z")
Hello. The problem in the images that I download or try to upload somewhere. Instead of the image itself, i get some multi-colored stripes are displayed on the jpeg/png or webp no matter. In version 12.5.6 (32b… --- ## [NoScript Per Site Permissions- question about reset on restart](https://forum.torproject.org/t/noscript-per-site-permissions-question-about-reset-on-restart/14839)
**Author:** [@thermosflask](https://forum.torproject.org/u/thermosflask)\ **Replies:** 7\ **Last updated:** [September 27, 2024, 7:00pm UTC](https://forum.torproject.org/t/noscript-per-site-permissions-question-about-reset-on-restart/14839 "2024-09-27T19:00:54Z")
When using NoScript on Tor Browser for Mac is it possible to have private windows (shift-command-P) use the default settings to avoid fingerprinting, and non-private windows (command-N) use a custom set of per site permi… --- ## [Does increasing zoom in tor browser give me a unique fingerprint?](https://forum.torproject.org/t/does-increasing-zoom-in-tor-browser-give-me-a-unique-fingerprint/13128)
**Author:** [@Zhk2stsf](https://forum.torproject.org/u/Zhk2stsf)\ **Replies:** 6\ **Last updated:** [June 26, 2024, 7:56am UTC](https://forum.torproject.org/t/does-increasing-zoom-in-tor-browser-give-me-a-unique-fingerprint/13128 "2024-06-26T07:56:30Z")
Sometimes I struggle with my declining vision and feel the need to increase magnification of pages in the tor browser. For example, this forum is easier to read if I increase the zoom in my browser. Does this affect my … --- ## [Stupid question- could bookmarking websites affect my browser fingerprint?](https://forum.torproject.org/t/stupid-question-could-bookmarking-websites-affect-my-browser-fingerprint/12050)
**Author:** [@Zhk2stsf](https://forum.torproject.org/u/Zhk2stsf)\ **Replies:** 2\ **Last updated:** [March 24, 2024, 9:58pm UTC](https://forum.torproject.org/t/stupid-question-could-bookmarking-websites-affect-my-browser-fingerprint/12050 "2024-03-24T21:58:20Z")
I know that the tor project does not recommend adding extensions, since they could give you a unique browser fingerprint. 1- Is this the case for all extensions or just ones that directly affect what is on the page (suc… --- ## [How prevalent and advanced is browser fingerprinting?](https://forum.torproject.org/t/how-prevalent-and-advanced-is-browser-fingerprinting/11531)
**Author:** [@bee0009](https://forum.torproject.org/u/bee0009)\ **Replies:** 1\ **Last updated:** [February 12, 2024, 3:44pm UTC](https://forum.torproject.org/t/how-prevalent-and-advanced-is-browser-fingerprinting/11531 "2024-02-12T15:44:17Z")
Several questions: How much of the websites utilize browser fingerprinting? How powerful are the fingerprinters? If my threat model is just to avoid tracking by companies, is basic randomization good enough? Can I che… --- ## [Javascript based biometrics](https://forum.torproject.org/t/javascript-based-biometrics/8217)
**Author:** [@dt76539](https://forum.torproject.org/u/dt76539)\ **Replies:** 12\ **Last updated:** [January 2, 2024, 9:20pm UTC](https://forum.torproject.org/t/javascript-based-biometrics/8217 "2024-01-02T21:20:24Z")
Has there been any discussion concerning javascript based biometric de-anonymization techniques using keyboard and mouse I/O? Are there any plans to attempt to introduce delay in these two sources of user input as an ob… --- ## [Pixel Tracking, Protection from ...](https://forum.torproject.org/t/pixel-tracking-protection-from/9914)
**Author:** [@CRhode](https://forum.torproject.org/u/CRhode)\ **Replies:** 0\ **Last updated:** [October 25, 2023, 10:24pm UTC](https://forum.torproject.org/t/pixel-tracking-protection-from/9914 "2023-10-25T22:24:41Z")
Just received a postcard to verify my Settlement Class Membership in a class action against my healthcare provider. It seems they used Meta Pixel extensively for Web analytics and (inadvertently allegedly potentially) d… --- ## [Make Tor Browser remember last used window size](https://forum.torproject.org/t/make-tor-browser-remember-last-used-window-size/9200)
**Author:** [@kingmustard](https://forum.torproject.org/u/kingmustard)\ **Replies:** 6\ **Last updated:** [September 15, 2023, 12:30am UTC](https://forum.torproject.org/t/make-tor-browser-remember-last-used-window-size/9200 "2023-09-15T00:30:39Z")
The default window size on my system (Windows 11), based on a screenshot I took upon opening the browser, appears to be 1002 x 1114 px. Despite any privacy issues that may entail, I want the browser to remember the last… --- ## [Bookmarks, Toolbars (fingerprinting)](https://forum.torproject.org/t/bookmarks-toolbars-fingerprinting/2828)
**Author:** [@pierce](https://forum.torproject.org/u/pierce)\ **Replies:** 2\ **Last updated:** [June 3, 2022, 7:34pm UTC](https://forum.torproject.org/t/bookmarks-toolbars-fingerprinting/2828 "2022-06-03T19:34:03Z")
I saw Saving bookmarks, customize toolbar (locked topic). And I remembered reading, that it was possible to fingerprint someone through the favicons of their bookmarks. I also remember, that for people with custom DPI, … --- ## [Whitelisting Specific CSS Media Queries](https://forum.torproject.org/t/whitelisting-specific-css-media-queries/3075)
**Author:** [@Saklad5](https://forum.torproject.org/u/Saklad5)\ **Replies:** 2\ **Last updated:** [May 5, 2022, 10:48am UTC](https://forum.torproject.org/t/whitelisting-specific-css-media-queries/3075 "2022-05-05T10:48:06Z")
While I understand it reduces anonymity, I strongly prefer having websites respond to the “prefers-color-scheme” CSS media query. Unfortunately, this query is forced to return “light” while privacy.resistFingerprinting i… --- ## [Border Around Websites](https://forum.torproject.org/t/border-around-websites/1812)
**Author:** [@umar](https://forum.torproject.org/u/umar)\ **Replies:** 6\ **Last updated:** [February 3, 2022, 9:41pm UTC](https://forum.torproject.org/t/border-around-websites/1812 "2022-02-03T21:41:25Z")
Hi, why i am seeing this border on left and right of the browser and how to remove this?