v0.1.2017 Jul 2026·Rendering, Web APIs & DOM, Media

The whole font family

Until now the engine kept ONE face per font family, so every bold headline was a regular face double-struck and every italic a sheared upright. This release loads the family whole: the bold, the italic, the bold italic, the light and medium weights, and the per-script subsets a page declares -> and picks the exact face each run of text asks for, the way the reference browser does. A news site headlines now render in real Reith Serif Bold, New York Times headlines in their real bold face with clean spacing, and a news site's headline typeface loads in full. System fonts got the same treatment: your Mac's Helvetica, Georgia, Times, and Menlo now contribute their genuine bold and italic faces, so even plain bold body text is the real thing. Bonus: the encyclopedia's photo and video thumbnails stopped blowing up to near-page width and squeezing the article into a sliver.

Parity with the reference browser

74overall, as of v0.1.343

Web APIs / DOM surface42

Security architecture66

GPU / graphics acceleration68

DevTools / extensions72

Networking85

Media85

Accessibility85

Real-world site compatibility99

HTML parsing100

CSS parsing + selectors100

Layout: block / flex / grid / tables / writing-modes100

Paint + visual100

JavaScript language100

JavaScript performance (JIT)100

HTML parsing100

What changed 7 changes

Web APIs & DOM	Web fonts load as whole families: every declared weight, style, and per-script subset of a family is fetched and registered, and each run of text resolves to the face CSS font matching says it should use.
Rendering	Real bold and real italic: synthetic double-strike bold and sheared italic are now used only when a page genuinely ships no matching face. A news site headlines are true Reith Serif Bold; NYT headlines lose the smeared look and uneven word gaps.
Web APIs & DOM	unicode-range support: a family split into per-script subset files (the common web-font pattern) picks the covering subset per character at shaping time.
Rendering	System fonts contribute their real variants: TrueType Collections enumerate their member faces (Helvetica regular, bold, oblique, bold oblique, light) and web-safe faces find their sibling files (Georgia Bold, Verdana Italic), each registered with its true weight and slant read from the font itself.
Rendering	Plain bold text is really bold: the platform sans, serif, and monospace register their genuine bold faces, so font-weight: bold body text renders the real face instead of a thickened regular.
Rendering	Measurement and paint always agree on the face, fixing a latent mismatch where generic-serif text measured with the sans font and painted with the serif one.
Media	Encyclopedia thumbnails behave: figures built with display: table now size to their media, with the caption wrapping beneath, instead of stretching near-full width and squeezing article text into slivers.