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Jake WriterandClaude Opus 5.5
fb21b2e35a
Three behaviours a page could detect, changed in one breaking release:
- **Animations run on stock timing.** no-css-animations.patch finished every
finite animation at once by default, and any page could read it:
`el.animate(frames, 1000).effect.getComputedTiming().duration` was 0, and a
500ms transition reported 0. Measured on v152.0.4-beta.31. The speedup is
now an opt-in, `instantAnimations: True`, which raises a LeakWarning.
disableInstantAnimations is gone.
- **speak() on a spoofed voice works like a real voice.** It fired `error`
after 3ms unless voices:fakeCompletion was set, and then start and end in
the same tick. It now starts and ends after the text's duration at ~150
words per minute. Both voices:fakeCompletion keys are gone, and so is a
debug line printed to stderr on every call.
- **Keys removed:**
- battery:* and window.scrollMinX/Y: Firefox keeps getBattery() and
scrollMin* chrome-only, so no page could read them.
- window.scrollMaxX/Y, screen.pageXOffset/pageYOffset,
window.history.length and document.body.client*: each pinned a live value
to a constant, so scrolling, navigating or re-laying out never changed it.
fpgen.yml mapped pageYOffset, so about 15% of identities froze
window.scrollY at a non-zero value.
- The body keys' role as an undocumented alias for window.innerWidth/Height
in browser-init and in the launcher.
- MaskConfig::GetInt32Rect, which only the body keys used.
New guards, both of which fail on v152.0.4-beta.31:
tests/patches/animation-timing.py and tests/patches/spoofed-voice-speaks.py.
The decisions are recorded as animations-run-on-stock-timing and
spoofed-voices-speak. Every patch applies cleanly to a fresh tree, and the
result builds.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>