Polypane 13 introduces beta support for Chrome browser extensions (manifest v2), CSS Nesting support in the elements inspector, and a new search-by-CSS-selector feature across all panes. The release also upgrades to Chromium 110 with new CSS flags enabled (view timeline, style queries, trigonometric functions, nth-child complex selectors), adds layout alignment options, improves the Content Chaos debug tool with granular less/more controls, extends custom headers to all requests, adds Web Vitals INP attribution, improves screen reader compatibility, and includes WebFinger and Ads.txt support in the Meta panel.
