#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 Thorin): **FWIW**: Win 7 64bit (bare metal) just 8.5a12 64bit - `224a8abee799ec6381e06293de4565f6` - 2x Error: WebGL warning: Exceeded 16 live WebGL contexts... Win 7 32bit (VM) - `224a8abee799ec6381e06293de4565f6` - 17x Error: WebGL warning: Disallowing antialiased backbuffers due to blacklisting - then 1x Error: WebGL warning: Exceeded 16 live WebGL contexts... - then 1x Error: WebGL warning: Disallowing antialiased backbuffers... - repeat the last two lines about a dozen times Win10 64bit (VM) 8.5.a12 64bit & 32bit - `6992168724b997c74fc89f1e4a9301ce` - a plethora of errors --- **Please advise**: I was going to open another ticket when I had done some more testing, but **readPixels** is not covered by RFP (see https://bugzilla.mozilla.org/show_bug.cgi?id=1428034 ) and using my tests [1], on windows I get entropy. Not sure if unique or just OS. - Windows 7 32bit `2ba61e7e8e370fdbcefb79456e7e944b060f34289af33732aa6eb75af61ff06c` - Windows 7 64bit `ac9aa378cd16219ecbcb6ec46b57d8a484ac8ad61cbe63c810b40fb2c741e7f3` - Windows10 64bit `c4ef81818ccaca2c4933f63c45bf5ffaaa7f2233f2761e3c6ba14a9e5cb82c25` It seems to be consistent on Linux, and Mac i have no idea: here's some data - Mint Cinnamon 32/64bit `not supported` - Ubuntu GNOME `5abc446cce2558be83bfe60baeb6dc7ff2a17635057c4612fe835649e7c77329` - Debian GNOME `5abc446cce2558be83bfe60baeb6dc7ff2a17635057c4612fe835649e7c77329` - Mac 10.14 `96f2538daa8a0a180f77a13d80ad455a75ae17c5495ce90fa4fd4267cbfd5210` So besides windows OS entropy, theres at least two buckets for Linux? [1] https://ghacksuserjs.github.io/TorZillaPrint/TorZillaPrint.html#canvas -- Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30537#comment:3> Tor Bug Tracker & Wiki <https://trac.torproject.org/> The Tor Project: anonymity online
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