In Polypane 15 we added a new fully-featured browser, made big performance improvements, added a Mastodon preview, improved the elements panel & more

They are fundamental CSS concepts you use every single day whether you know it or not: the offset parent and stacking context.

Polypane 12 introduces our new command bar and new a11y features and it runs on Chromium 108.

Get Polypane for yourself or your entire team! Build better websites in less time with a browser that makes your site more responsive & accessible.

Which screen sizes to design, build and test on is a perennial topic in web development.

Testing on specific device widths is an evolutionary dead end, and the 3px difference between iPhone 14 and iPhone 14 pro just proved it.

Polypane 10 brings a number of often requested workflow features to Polypane like a detachable panel and the ability to turn off navigation sync

New features to quickly test forms, a faster screenshot feature, support for the INP web vital and heading and landmark info inside viewports.

In this article we're going to focus in on some new features that are available for the CSS selectors: the :is(), :where() and :has() pseudo-classes.

We'll explore where Forced Color Mode comes from, how it changes your site and how you can adapt to it.

How to always open localhost in your development browser while opening all other URLs in your regular browser on Mac, Windows and Linux.

Each year, the state of CSS takes a global survey of the CSS landscape.

A better Elements inspector, performance improvements, Chromium 98, forced colors emulation, focus state sync, ARM support, a new debug tool and more.

With the new EyeDropper API in Chromium, websites can let visitors pick colors from anywhere on their screen.

Peek at element just like in design tools, webvitals monitoring for each pane, astigmatism simulators and Chromium 91 with container query support!

Polypane now has a unified console that combines console messages from all viewports and lets you send console commands to all of them too.

Beautiful CSS 3D transform examples using a single div that you can copy with one click.

Media queries are what make modern responsive design possible.

Do you always need media queries to make a website responsive?