The chrome-devtools-mcp team made updates to it and to Puppeteer to better support Polypane (and other @electronjs.org apps). Despite my general qualms about Generative AI, I think that's pretty cool!

Chrome-devtools-mcp allows you to connect coding agent like GitHub Copilot and Cursor to Polypane to inspect and get feedback across all your viewports. Learn how: polypane.app/blog/using-c...

Last year we wrote an article on all the ways position:sticky can fail and to this day it remains in the top 10 of weekly most visited pages. Getting stuck with sticky? This is the post for you. polypane.app/blog/getting...

Last year we wrote an article on all the ways position:sticky can fail and to this day it remains in the top 10 of weekly most visited pages. Getting stuck with sticky? This is the post for you. polypane.app/blog/getting...

Right after (experimental) support for field-sizing landed in chromium 120 back in December 2023 we immediately made good use of it in Polypane and wrote about it and the alternatives we used before: polypane.app/blog/field-s... It's too bad that end of 2025 it's still chromium-only.

Here's a cool photo that Polypane user Marcos sent us recently. He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost! Should we make available a set of icons to use?

Be like STEEEEEEEEEVE.

Here's a cool photo that Polypane user Marcos sent us recently. He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost! Should we make available a set of icons to use?

Just improved my web dev workflow by getting a @polypane.app subscription! 🥳 🔥 🤩 polypane.app

Only *cool* browsers contribute back to the platform. 😎

Market research! How often do you use one of those "what is my browser" websites (personally or sent to someone)? Would you use one that isn't littered with ads or has a design from 1995? What features should it have? What if you could also use it to collect info to emulate devices in Polypane?

Share your insights!

This year, Igalia did some work to improve mobile-device emulation in @polypane.app by adding features to Chromium that could eventually improve Chrome itself, as well as API work to improve Electron. Learn more about the details here: www.igalia.com/2025/10/21/H...

Looking for our logo, icon or other brand assets? Right-click the logo on the site to find our brand kit!

Line numbers you say? 🤔

We just released 26.0.1 with a bunch of fixes and improvements, in particular for the brave souls already using macOS Tahoe: polypane.app/blog/polypan...

New in Polypane 26: all our devices emulate the correct `safe-area-inset-*` CSS environment variables, as well as the correct small viewport height. Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.

Kilian is at Frontmania today to speak about the INTL API! Make sure to grab the magazine for a cool article about Polypane and ask Kilian for some stickers!

Polypane 26: Accurate Device Emulation With Safe Area and Small Viewport Units, by @polypane.app: https://polypane.app/blog/polypane-26-accurate-device-emulation-with-safe-area-and-small-viewport-units/ #releasenotes #polypane #browsers

Nerds. Als je websites loopt (*) te bouwen, dan wil je de boel testen in een hele goede, complete browser. Daarom raad ik de browser aan van Nederlands beste browser-bouwer @polypane.app Ik gebruik 'm al jaren en ik kan nog steeds nieuwe dingen ontdekken: polypane.app

Haven't praised @polypane.app lately so here it is. Such an awesome tool. I seriously can't imagine developing anything without it. Worth every penny. Highly recommended.

Custom media queries are actively being worked on in Chromium, so it won't be long until we can update our complete guide to CSS Media queries! Check it out to get a head start on using custom media queries. polypane.app/blog/the-com...

New in Polypane 26: all our devices emulate the correct `safe-area-inset-*` CSS environment variables, as well as the correct small viewport height. Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.

@polypane.app is an absolute game changer if you develop websites. polypane.app/blog/polypan...

This was a tiny feature to implement, but I get so much value out of color coding the address bar depending on the domain I'm working on. Tab customization in @polypane.app: polypane.app/docs/tab-cus...

Polypane 26 is here! Emulate safe-inset-area variables and the small viewport height inside Polypane for the most accurate device emulation available. Of course there's more, like improvements to inspection, measurement overlays, Chromium 140 and much more. polypane.app/blog/polypan...

Polypane 26 is here! Emulate safe-inset-area variables and the small viewport height inside Polypane for the most accurate device emulation available. Of course there's more, like improvements to inspection, measurement overlays, Chromium 140 and much more. polypane.app/blog/polypan...

Did you know our CSS Specificity calculator has a 'secret' feature? If you give it multiple comma separated selectors, you can sort them by specificity and see which one wins! polypane.app/css-specific...

Help us out? 🙏

Did you know our CSS Specificity calculator has a 'secret' feature? If you give it multiple comma separated selectors, you can sort them by specificity and see which one wins! polypane.app/css-specific...

I just renewed @polypane.app for another year. I highly recommend it for testing numerous aspects of your site in a single application.

Updated with some progressive enhancement 👍

CSS-only floating focus with anchor positioning We're using anchor positioning to duplicate our Track Focus debug tool (that shows a floating indicator around focused elements) using purely CSS. Follow the walk-through and check out the demo at the end! polypane.app/blog/css-onl...

CSS-only floating focus with anchor positioning We're using anchor positioning to duplicate our Track Focus debug tool (that shows a floating indicator around focused elements) using purely CSS. Follow the walk-through and check out the demo at the end! polypane.app/blog/css-onl...

-> Polypane -> Focus mode -> So smooth. Bonus: 1. Animated transition between known sizes 2. Zoom way, way larger than your current screen 3. Stress test with random resizes

🧙‍♀️

Exciting! @polypane.app has been selected as one of the Best Companies to Watch in 2025 by the research team of "CEO Vision". I'm not going to pay the Nominal Sponsorship fee of $1500 to be featured in the magazine but figured I should share the news with you all regardless.

Build Better Websites with The Polypane Development Browser: https://www.youtube.com/watch?v=ThOq55qbJ2Y

Let's talk about Polypane with @stefanjudis.com! @kilianvalkhof.com recently joined Stefan for a Polypane walk-through, watch it here: polypane.app/blog/polypan...

Just improved my web dev workflow by getting a @polypane.app subscription! 🥳 🔥 🤩 polypane.app

The State of CSS 2025 survey results are now available: 2025.stateofcss.com/en-US/ Big thanks to @amitsheen.bsky.social, @saron.bsky.social, @miocene.io, @sjoy.lol, @joshwcomeau.com, @kilianvalkhof.com, and all the other contributors!

This is in 30 minutes! Viewers can vote on a people’s choice award. See my pitch and come support me 🙏

Built right into @polypane.app by turning on the placeholdifier debug tool! polypane.app/docs/debug-t...

We just improved our overview of Experimental Chromium web platform features with shareable URLs! If you want to know what CSS features have been (experimentally) introduced in which recent version, check out this link: polypane.app/experimental...

We just improved our overview of Experimental Chromium web platform features with shareable URLs! If you want to know what CSS features have been (experimentally) introduced in which recent version, check out this link: polypane.app/experimental...

We released a new version yesterday! Which means today we have a bugfix release 🫣 DRM on macOS didn't always work, but now it does! We also made various improvements to our contrast checker and web component inspection in the elements panel. polypane.app/blog/polypan...

Polypane 25.1 is out! - DRM support: use Netflix, Spotify etc in Polypane - Re-open closed tabs feature - Bug fixes and improvements to the elements panel, outlines, form autofilling and more. polypane.app/blog/polypan...

Kilian was on the @oddbird.dev Winging It Live stream to chat about Polypane and devtools. Watch it back here: polypane.app/blog/polypan...

We're proud to add two new awards to our ever-growing list. This time we're recognised as Category leaders by GetApp and we're on the Capterra shortlist, both for (web) app development 🙌 See all our awards at polypane.app/accolades/

Just finished a backlog item in 15 minutes (docs included) that's been on the @polypane.app backlog since 2020 😅 It wouldn't have been 15 minutes back then. Everything I built in the past 5 years helped me built this in 15 minutes.