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Re: [tor-bugs] #30537 [Applications/Tor Browser]: WebGL fingerprint is different between Windows versions (and compared to non-Windows OSes)
#30537: WebGL fingerprint is different between Windows versions (and compared to
non-Windows OSes)
-------------------------------------------------+-------------------------
Reporter: gk | Owner: tbb-
| team
Type: defect | Status: new
Priority: High | Milestone:
Component: Applications/Tor Browser | Version:
Severity: Normal | Resolution:
Keywords: tbb-fingerprinting, tbb- | Actual Points:
fingerprinting-os |
Parent ID: | Points:
Reviewer: | Sponsor:
-------------------------------------------------+-------------------------
Comment (by cypherpunks):
Replying to [comment:10 cypherpunks]:
> So, that's due to Firefox doesn't recognize Win 10 renderer:
> {{{
> D3D11_COMPOSITING Blocklisted; failure code
BLOCKLIST_FEATURE_FAILURE_UNKNOWN_DEVICE_VENDOR
> }}}
https://hg.mozilla.org/mozilla-
central/file/06ee65d8ccdef77673ccc43098525565a11ce370/widget/windows/GfxInfo.cpp#l1415
`Microsoft Basic Render Driver` is a system device, therefore it doesn't
have `VendorID`.
Vendor lock by Mozilla. What a shame!
> that changes the fingerprint and triggers:
> {{{
> Error: WebGL warning: Disallowing antialiased backbuffers due to
blacklisting. canvas.js:180:11
> }}}
There is a strong opinion to disable it everywhere:
https://bugzilla.mozilla.org/show_bug.cgi?id=809550
> Forcing MSAA fixes that error, but doesn't change the fingerprint.
Bad Mozilla. You need two:
"To force-enable WebGL, go to about:config and set webgl.force-
enabled=true.
To force-enable WebGL anti-aliasing, go to about:config and set webgl
.msaa-force=true."
https://wiki.mozilla.org/Blocklisting/Blocked_Graphics_Drivers
#How_to_force-enable_blocked_graphics_features
to finally get `224a8abee799ec6381e06293de4565f6`.
Related issues (still not fixed):
https://bugzilla.mozilla.org/show_bug.cgi?id=1429587
https://bugzilla.mozilla.org/show_bug.cgi?id=1383295
https://bugzilla.mozilla.org/show_bug.cgi?id=1419111
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30537#comment:11>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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