Opened 4 years ago

Closed 4 years ago

Last modified 4 years ago

#19992 closed defect (worksforme)

System details leakable via navigator.oscpu

Reported by: be11f157cd19c4a2ba1e9c70a38b1a74 Owned by: tbb-team
Priority: High Milestone:
Component: Applications/Tor Browser Version:
Severity: Major Keywords: tbb-fingerprinting
Cc: Actual Points:
Parent ID: Points:
Reviewer: Sponsor:


navigator.oscpu returns the correct operating system. While this may not be a problem on windows, on my Linux machine it returns "Linux x86_64"

Child Tickets

Change History (3)

comment:1 Changed 4 years ago by be11f157cd19c4a2ba1e9c70a38b1a74

You may want to consider remove navigator.oscpu entirely to prevent the browser from being identified as Firefox.

comment:2 Changed 4 years ago by gk

Keywords: tbb-fingerprinting added; oscpu leakage removed
Resolution: worksforme
Status: newclosed
Version: Tor: unspecified

That's not happening for me with a default 6.0.4 on a Linux system. I get back OS CPU Windows NT 6.1 when testing on

comment:3 Changed 4 years ago by be11f157cd19c4a2ba1e9c70a38b1a74

Sorry for the confusion, apparently this only happens on the new tab page.

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