v0.1.3881 Nov 2026·Rendering, Web APIs & DOM

A space agency's home page, a news section and a language site's header now match the reference

A website rendering release: 18 changes found on real sites, each checked against the reference browser and shown below with before and after pictures.

Parity with the reference browser

74overall, as of v0.1.402

GPU / graphics acceleration65

Security architecture72

DevTools / extensions73

Web APIs / DOM surface75

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

A hero that shows its headline

Before: A space agency's home page: Floati without these four fixes, with them, and the reference browser. — BeforeFloati

After: A space agency's home page: Floati without these four fixes, with them, and the reference browser. — Afterv0.1.388

The same page in the reference browser — Reference browserfor comparison

BeforeAfter

A space agency's home page opened on a picture with no words: its headline, intro and button were painted underneath the hero image, the image stopped short above a black band, and the dark overlay that keeps white text readable never appeared. Four separate rules were missing: z-index on a flex item, a z-index rising out of a wrapper that paints nothing, a percentage height measured against a minimum height, and gradient stops written as lengths. Each is now measured against the reference browser and covered by a test.

A space agency's hero, pixels different from the reference64.0% -> 5.8%

News cards keep their columns and photos

Before: The same page's news section: Floati without these four fixes, with them, and the reference browser. — BeforeFloati

After: The same page's news section: Floati without these four fixes, with them, and the reference browser. — Afterv0.1.388

BeforeAfter

Below the hero, the news section lost its third column, its round thumbnails covered their headlines, three photos never loaded and the cards ran too wide. The causes: a card's full-height wrapper got no height inside a fixed-height column, a box's narrowest size ignored its own min-width, the common box-sizing: inherit rule did nothing, and image addresses containing a comma were split in two.

A space agency's news section, pixels different from the reference40.9% -> 12.9%

A header on one line, with its icons

Before: A programming language's home page: Floati without these eight fixes, with them, and the reference browser. — BeforeFloati

After: A programming language's home page: Floati without these eight fixes, with them, and the reference browser. — Afterv0.1.388

BeforeAfter

A programming language's home page had a header two lines too tall, no section icons and a search box broken over two lines. Eight rules were behind it, from floats sharing a line with text to which of two font rules wins, line heights on inline text, icon sizes, a space next to a hidden label, and position: relative on links. All eight now match the reference browser.

A programming language's home page header, pixels different from the reference27.9% -> 5.2%

Two script errors gone

A sports site's tag manager threw on every page, because a global variable named with two leading underscores was kept apart from the window's own copy. A news site's analytics pings each threw, because requests marked no-cors were treated as ordinary cross-site requests. Both are fixed, and every test site loads with no script errors of its own.

Test sites with no script errors of their own14 of 14Script time on 11 test sites, against 0.1.387flat (0.999)

What changed 18 changes

Rendering	FIX: a hero's text no longer hides under its picture. z-index on a flex or grid item now stacks it, as CSS says: a space agency's home page painted its headline, intro and button under the hero image.
Rendering	FIX: a z-index set deep inside a positioned box that paints nothing of its own now rises above that box's later siblings, as in the reference browser. The same hero's text stayed under the picture because of it.
Rendering	An absolutely positioned box sized height: 100% now counts its container's min-height. A hero 640px tall by min-height gave its picture and its dark overlay the height of its short text instead, leaving a black band.
Rendering	Gradients take length stops such as "#000 0" or "red 20px", and stops without a position are spread between their neighbours. A hero's dark readability overlay was rejected outright because of its unitless 0, so white text sat on a bright photo.
Rendering	In a column of fixed height, every item's flexed height is now definite for what it holds. A news card's height: 100% wrapper got the height of its content (none), and its hidden overflow clipped the whole card: a news section lost its third column.
Rendering	A box's narrowest size now respects its own min-width and max-width. A round 80px thumbnail with min-width shrank its holder to 30px, and the picture covered its headline.
Rendering	FIX: inherit works on every property, not only the ones that inherit by default. The very common "box-sizing: inherit" rule left every box sized without its padding counted in, so padded boxes ran too wide (cards clipped their headlines).
Rendering	FIX: responsive image lists whose addresses contain commas pick the right picture. An image service's "?resize=300,200" addresses were split at the comma, the browser asked for an address that does not exist, and news photos never appeared.
Rendering	An image whose width comes from its height and shape now respects max-width: a 2:1 picture 80px tall in an 80px box was drawn 160px wide over its neighbour.
Rendering	When a box sizes itself to its content, text and a float beside it now count as one line, as in the reference browser. A header's "Donate" link and the search bar after it sat on two lines.
Rendering	A right float after a line of text now starts on that line when it fits, and right- or centre-aligned text moves over to make room, instead of the float always dropping below.
Rendering	FIX: of two matching @font-face rules, the later one is used, as the font standard says. A programming language's site lists an old .eot file first and its real icon font second, and every icon was missing.
Rendering	Text inside an element with its own line-height now uses it: a span with line-height 30px in a line-height 0 parent is a 30px line, not 17px. A feature test that measured this failed and the same site hid its icons.
Rendering	FIX: a decoration drawn before or after an element with a font size like 1.75em is that size once: a 28px search icon was drawn 49px, pushing the search box onto a second line.
Rendering	The space before a hidden screen-reader label still counts when a box sizes itself to its content. A search form came out one space too narrow and wrapped its input under its icon.
Rendering	position: relative now moves inline elements such as links, as in the reference browser. A "Donate" link set 38px lower stayed level with the logo. The check costs nothing on pages that do not use it.
Rendering	FIX: a page's own global variables whose names start with two underscores behave like any other global. A sports site's tag manager read a stale copy and threw an error on every page.
Web APIs & DOM	FIX: fetch requests marked no-cors get the opaque reply every browser gives them. They were treated as ordinary cross-site requests and failed, so a news site's analytics pings each threw an error.