Polypane 19 is a major update to the development browser for web developers, bringing numerous workflow improvements. Key additions include Capo.js integration for head element ordering analysis, INP metric support in the Web Vitals panel with CrUX data, and a live DOM view in the elements panel that updates in real time. The elements panel also gains color format switching, improved CSS/HTML copying options, weighted autocomplete, and better @scope support. Other highlights include element screenshots with padding, automatic dark mode emulation, color contrast picking directly from elements, improved console search and error messages, social preview updates for LinkedIn/Slack/Discord, and dozens of smaller UX fixes. The release runs on Chromium 124.
