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wnxdandClaude Opus 5
9ab9867d77
camoufox ships 287 font files under Contents/Resources/fonts on macOS
(Makefile passes `--fonts windows linux` to package.py) and already sets
`defaultPref("gfx.bundled-fonts.activate", 1)` in settings/camoufox.cfg,
but none of them are ever loaded: the macOS build does not define
MOZ_BUNDLED_FONTS, so CoreTextFontList::ActivateBundledFonts() is
compiled out. That function is the only caller of ActivateFontsFromDir(),
which is what registers <GRE>/fonts with CoreText via
CTFontManagerRegisterFontURLs().
Upstream defaults the option to `target.os == "WINNT" or target.kernel ==
"Linux"` (toolkit/moz.configure), so Linux and Windows enable it
implicitly and macOS silently does not. The configure option itself is
gated only on `project == "browser"`, which camoufox is; there is no
platform restriction.
Effect on a macOS host: a spoofed font list currently resolves against
the host's own fonts, so the measurable set is `host fonts INTERSECT
claimed list` -- 13 of 60 claimed families measurable in local testing,
and those 13 are exactly the macOS-native ones. Font metrics are a
cross-checked fingerprinting surface (a UA claiming Windows alongside
macOS font metrics is a contradiction detectors look for), so this
undercuts the spoofing rather than merely reducing it.
Refs #706
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
