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>
PR #562 added a `media:spoof_codecs` read on the C++ side --
MaskConfig::GetBool("media:spoof_codecs") in MP4Decoder and
MatroskaDecoder -- but never declared the key in settings/. Since
validate_config() drops any key it does not recognise, the documented
usage was inert:
AsyncCamoufox(config={"media:spoof_codecs": True})
-> "Skipping unknown patch media:spoof_codecs : True"
The key never reached the browser, so the feature could not be turned on
through the supported path at all. Declared in both properties.json and
camoucfg.jvv (bool, beside mediaDevices:enabled).
The new test is the general form rather than a check for this one key:
it scans patches/ and additions/ for MaskConfig::Get*/Has*("key") reads
and fails when a key is not declared in settings/properties.json. A
patch and its schema entry are two halves of one change, and shipping
only one half is a mistake this project has now made in both directions
-- canvas:seed (#721) and navigator.maxTouchPoints (#696) were declared
but unconsumed; this one was consumed but undeclared. Across the tree
the scan finds 63 reads against 109 declared keys, and media:spoof_codecs
was the only gap.
Note the runtime reads properties.json from the *installed browser
bundle*, not the repo, so this fix only takes effect for a build
packaged after it.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GQgHHGRXNp29jr4xQjK7iv
(cherry picked from commit 375b0fca4529a722220022c7993c030b83439db1)
Jake WriterandClaude Opus 5.5