--- title: "Polypane 13: CSS Nesting, extension support in beta, search by selector and Chromium 110" url: https://daily.dev/posts/polypane-13-css-nesting-extension-support-in-beta-search-by-selector-and-chromium-110-c2lnncybn source_url: https://polypane.app/blog/polypane-13-css-nesting-extension-support-in-beta-search-by-selector-and-chromium-110 type: article source: "Polypane" published: 2026-06-28T11:35:29.068Z updated: 2026-07-02T02:15:21.045Z tags: ["chromium", "devtools", "polypane", "webdev"] reading_time: 12 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Polypane 13: CSS Nesting, extension support in beta, search by selector and Chromium 110 **[Polypane](https://daily.dev/sources/polypane)** · 12 min read · 0 upvotes · 0 comments ## Summary 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. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#chromium](https://daily.dev/tags/chromium), [#devtools](https://daily.dev/tags/devtools), [#polypane](https://daily.dev/tags/polypane), [#webdev](https://daily.dev/tags/webdev) [View this post on daily.dev](https://daily.dev/posts/polypane-13-css-nesting-extension-support-in-beta-search-by-selector-and-chromium-110-c2lnncybn)