v0.3.0

ruyijs 0.3.0 adds macOS arm64 and Linux x86_64 wheels to PyPI. GitHub Actions now builds the wheels for all three platforms from the official Firefox 159.0 source.

python -m pip install --upgrade ruyijs

Platform	Wheel	Notes
Windows x64	win_amd64	js.exe and mozglue.dll built from the Firefox 159.0 source on CI; Necko transport as in 0.2.1
macOS arm64	macosx_26_0_arm64	macOS 26 or later; direct HTTPS through libnecko_core / libnecko_quic; no proxy support yet
Linux x86_64	manylinux_2_39_x86_64	glibc 2.39 or later; #5 by @Starktomy; bundles its libraries and the Necko helper's Python

• Source: the official Firefox source is the firefox/ submodule (mozilla-firefox/firefox at FIREFOX_159_0_RELEASE).
• Build: one run of .github/workflows/wheels.yml builds SpiderMonkey, Skia and NSS on each runner, then ruyijs and the wheel.
• Tests: each installed wheel is tested offline and with one real page load.
• Fixes: this release also includes the Firefox 159 parity fixes made on main since 0.2.1: CSSOM serialization, the cascade, iframe timing, layout, and canvas colour and text.

ruyijs-runtime-0.3.0-win-amd64.zip is the Windows runtime that runtime.json pins for source builds. The changes are listed in CHANGELOG.md.

v0.2.1

Fixed

• Timer precision is Firefox 159's: performance.now(), timeOrigin,
  Date.now(), Event.timeStamp and every navigation / resource time are
  clamped to 1 ms with Firefox's jittered rounding (nsRFPService), one seed
  per document. Event.timeStamp is on the document's performance timeline.
• Navigation and resource timing report the measured DNS, connect and TLS
  phases from Necko (a reused connection reads fetchStart, as in Firefox);
  a browser-initiated load's fetchStart precedes navigationStart.
  deliveryType is in Firefox's member order; unreached milestones read 0.
• Necko resolves IP literals without a lookup and caches names
  (network.dnsCacheExpiration 60 s, 1600 entries).
• Layout: CSS margin collapsing, 17 px classic scrollbars on the viewport and
  scroll containers, root clientWidth/Height and scrollWidth/Height from
  the scrollport, scrollTopMax / scrollLeftMax, clientTop /
  clientLeft, window.scrollMaxX/Y.
• Fonts: SimSun line height (bad-underline metrics), the Arial default when no
  listed family is installed, Firefox's per-script system fallback list.
• SVG text getBBox: font box versus frame descent, and no glyph ink below
  20 px (text-rendering: auto).
• Example result files no longer ship in the wheel.

v0.2.0

Added

• Canvas 2D draws through Firefox 159's own Skia (gfx/skia), set up like
  Firefox's DrawTargetSkia: fills, strokes, paths, clip, gradients,
  patterns, roundRect, drawImage, shadows and fillText / strokeText.
• Context(tls="100".."159") selects the Firefox release whose TLS
  ClientHello, HTTP/2 settings and HTTP/3 priorities Necko sends.
• DOMMatrix / DOMMatrixReadOnly: every operation, fromMatrix,
  fromFloat32/64Array, CSS transform strings, transformPoint, toString.

Fixed

• Origin and the body Content-Type on fetch / XHR / sendBeacon;
  Sec-Fetch-Site across redirects; window.originAgentCluster.
• window.event during microtasks queued by an event listener.
• Font fallback by language group, element lang, SVG presentation
  attributes and SVG text getBBox; ctx.font read-back.
• python -m ruyijs.examples lists the examples that ship; DataDome output on
  a Chinese Windows console; the Akamai example keeps its User-Agent and TLS
  version together (--tls).

Changed

• The bundled runtime is rebuilt on Firefox 159 (SpiderMonkey, Necko, Skia).