3 ms·

Firefox sends an incorrect version and operating system on its User-Agent when the privacy settings are turned on. IIRC it defaults to a Windows user agent eve

by gkbrk 1y ago

Firefox sends an incorrect version and operating system on its User-Agent when the privacy settings are turned on. IIRC it defaults to a Windows user agent even when you use it on other operating systems.

grayhatter 1y ago
You're incorrect. I have Firefox configured with the most strict privacy settings, and it returns `Mozilla/5.0 (X11; Linux x86_64; rv:142.0) Gecko/20100101 Firefox/142.0)` With the exception of it being Wayland instead of X11 it's entirely accurate. Would love to see whatever gaslit you of something so easy to test and validate.
- gkbrk 1y ago
  Nope, as it turns out this was actually a thing until 2025-01-24, where a commit removed this "pretend to be Windows even on Linux platforms" behavior. https://github.com/mozilla-firefox/firefox/commit/eb2f90f870232e9326da278259e79119934b8740 https://github.com/mozilla-firefox/firefox/commit/eb2f90f870... This OS spoofing behavior was added in 2019-01-09 with this commit: https://github.com/mozilla-firefox/firefox/commit/264fe08c097ad3f0a0f79af0a5919cd9570bd33c https://github.com/mozilla-firefox/firefox/commit/264fe08c09... So Firefox has spoofed the User-Agent as a Windows machine on Linux for around 6 years, and only stopped doing it early this year. Would love to see whatever gaslit you into forgetting this easy to test and validate behavior.
  - grayhatter 1y ago
    https://support.mozilla.org/en-US/kb/resist-fingerprinting https://support.mozilla.org/en-US/kb/resist-fingerprinting This was part of the resist fingerprinting feature. Which is an advanced user configuration. I can alter the user agent directly myself too. Sigh I regret getting tricked into arguing over such a pedantic specific, So I'd like to redirect the actual point, which is that it's not meaningful if a Firefox browser pretends to be a slightly different Firefox browser, but instead the problem is when something that's not a browser, claims to be and behave like one. Still, +1 for finding the commit, I'd forgotten about this feature. I thought only the tor browser was this foolish.

by gkbrk 1y ago

grayhatter 1y ago

You're incorrect. I have Firefox configured with the most strict privacy settings, and it returns `Mozilla/5.0 (X11; Linux x86_64; rv:142.0) Gecko/20100101 Firefox/142.0)` With the exception of it being Wayland instead of X11 it's entirely accurate. Would love to see whatever gaslit you of something so easy to test and validate.

gkbrk 1y ago
Nope, as it turns out this was actually a thing until 2025-01-24, where a commit removed this "pretend to be Windows even on Linux platforms" behavior. https://github.com/mozilla-firefox/firefox/commit/eb2f90f870232e9326da278259e79119934b8740 https://github.com/mozilla-firefox/firefox/commit/eb2f90f870... This OS spoofing behavior was added in 2019-01-09 with this commit: https://github.com/mozilla-firefox/firefox/commit/264fe08c097ad3f0a0f79af0a5919cd9570bd33c https://github.com/mozilla-firefox/firefox/commit/264fe08c09... So Firefox has spoofed the User-Agent as a Windows machine on Linux for around 6 years, and only stopped doing it early this year. Would love to see whatever gaslit you into forgetting this easy to test and validate behavior.
- grayhatter 1y ago
  https://support.mozilla.org/en-US/kb/resist-fingerprinting https://support.mozilla.org/en-US/kb/resist-fingerprinting This was part of the resist fingerprinting feature. Which is an advanced user configuration. I can alter the user agent directly myself too. Sigh I regret getting tricked into arguing over such a pedantic specific, So I'd like to redirect the actual point, which is that it's not meaningful if a Firefox browser pretends to be a slightly different Firefox browser, but instead the problem is when something that's not a browser, claims to be and behave like one. Still, +1 for finding the commit, I'd forgotten about this feature. I thought only the tor browser was this foolish.