Files
camoufox/pythonlib/tests
Jake WriterandClaude Opus 5.5 a3dbe40d1a fix: stop generating a canvas seed, and drop config keys nothing reads
The browser has not noised the canvas since #528, and no patch reads
canvas:seed (#721). The launcher still drew one on every launch and sent it
through CAMOU_CONFIG, and NewContext called a setCanvasSeed that does not
exist. They no longer do.

For users this changes nothing on any browser since #528: the value was
ignored. A config that still passes canvas:seed gets the usual "Skipping
unknown patch" notice instead of silence. On a browser from before #528, the
launcher no longer turns canvas noise on, which is the behaviour #528 chose.

The same audit found more keys declared in settings/properties.json that no
patch or Juggler file reads, so setting them did nothing:
- canvas:aaOffset, canvas:aaCapOffset
- memorysaver, pdfViewerEnabled, webrtc:localipv4/6
- navigator.onLine, navigator.cookieEnabled, navigator.languages
- navigator.appCodeName, appName, product, productSub. Firefox reports these
  constants itself, so fpgen.yml no longer maps them.
- webGl:parameters:blockIfNotDefined and its WebGL2 twin

test_config_schema now checks this direction too: every declared key must be
read by the browser, unless it is listed with a reason. Three are listed:
locale:script and navigator.doNotTrack, which the launcher applies itself,
and navigator.buildID (#780).

The build-tester grading followed the same wrong premise. It tracked canvas
collisions as an unfixed per-context leak. A canvas that is rendered rather
than noised follows the fonts and GPU, as it does on real machines, so canvas
collisions are now counted with the other device-level values. The tribal rule
that recorded it as an open question is now a settled one,
canvas-is-not-noised, with an automated check.

Closes #721.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-25 15:22:28 -06:00
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