v0.1.2416 Sep 2026·Rendering

Vertical writing, and columns that break where you ask

Two layout upgrades. First, real vertical writing for top-to-bottom scripts: text set in a vertical writing mode now flows top-to-bottom with its lines stacking to the side, the way it is meant to. Chinese, Japanese and Korean read naturally with each character standing upright; Latin captions and labels set sideways read correctly; a vertical block sizes itself sensibly whether or not you give it a height; and an image sitting inside vertical text stays upright instead of tipping over. Second, multi-column layouts now honour where you ask them to break: push a heading to the top of the next column, keep a figure together with its caption so they are never torn apart, and stop a column leaving a single lonely line stranded at its top or bottom. Pages that use neither vertical writing nor columns are completely unchanged.

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 3 changes

Rendering	Vertical writing modes work properly. Text in a top-to-bottom writing mode now flows down the page with lines stacking across it: East Asian text stands each character upright and reads naturally, while Latin captions set sideways turn the correct way. A vertical block with no set height sizes itself to its content, and a long one wraps into side-by-side columns instead of running off the screen.
Rendering	Images stay upright inside vertical text. An inline picture in a vertical passage no longer rotates with the surrounding sideways text; it sits upright and the text simply flows past it, the way every reader expects.
Rendering	Multi-column layouts respect your break rules. You can force a section to start at the top of the next column, glue a block to the one after it so a figure and its caption never separate across a column boundary, and the columns no longer strand a single line on its own - a long article laid out in columns now breaks in the places a person would choose.