0003627: Site top banner ".DLatest" thinks I'm a Windows user with privacy.resistFingerprinting on Firefox 66+ as a GNU/Linux user

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Project

Category

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Date Submitted

Last Update

0003627

Site

[All Projects] Bug

public

2019-03-31 23:18

2019-04-03 20:57

Reporter

WubTheCaptain

Assigned To

Priority

normal

Severity

minor

Reproducibility

always

Status

new

Resolution

open

Platform

Debian GNU/Linux

OS Version

buster/sid

Summary

0003627: Site top banner ".DLatest" thinks I'm a Windows user with privacy.resistFingerprinting on Firefox 66+ as a GNU/Linux user

Description

'https://browserleaks.com/javascript [^]' thinks I'm a "Linux x86_64" user (correct) according to the JavaScript navigator API with user-agent "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0" (correct, version string anonymized by config option).

The User-Agent HTTP header sent to the server is "Mozilla/5.0 (Windows NT 6.1; rv:60.0) Gecko/20100101 Firefox/60.0".

The top site banner still thinks I'm a Windows user, telling me "Get the latest version: 3.0 for Windows" to download Zandronum. This is likely because GNU/Linux was removed from Firefox 66's spoofed OS list or something, when privacy.resistFingerprinting option is enabled.

...which means the fingerprint resistance in Firefox is (now finally) working as intended, as of Firefox 66. 🙂

Steps To Reproduce

Firefox 66.0.1. Set privacy.resistFingerprint set to "true" in about:config. Use GNU/Linux (or non-Windows/non-Android). Visit the Zandronum website, anywhere.

Additional Information

'https://bugzilla.mozilla.org/1509829 [^]'

Attached Files

Relationships

Notes
(0020464) WubTheCaptain (reporter) 2019-03-31 23:18	TL;DR: "won't fix" to save your time, Blzut3. 😀

(0020465) WubTheCaptain (reporter) 2019-03-31 23:27	So what typically happens with privacy.resistFingerprinting disabled and sending a "Linux" HTTP user-agent is the HTTP server sends a page with a download button (".DLatest") to the latest Zandronum executable on said GNU/Linux arch, IIRC.

(0020473) Filystea (reporter) 2019-04-03 20:57	Probably tired because I miss to understand what is topic of this ticket about. Spoof your TTL so your more % legit wincrap linux under hood user. God.

**Issue Community Support**
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Supporters:	No one explicitly supports this issue yet.
Opponents:	WubTheCaptain

Issue History
Date Modified	Username	Field	Change
2019-03-31 23:18	WubTheCaptain	New Issue
2019-03-31 23:18	WubTheCaptain	Note Added: 0020464
2019-03-31 23:27	WubTheCaptain	Note Added: 0020465
2019-04-03 20:57	Filystea	Note Added: 0020473

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