Polypane 22 is a major update to the developer browser for web professionals. Key additions include the ability to screenshot social media previews, updated social media preview designs for Google, Twitter, LinkedIn, Threads, and Bluesky, and new element-specific pseudo-state emulation powered by Chromium 130. Performance improvements deliver up to 60% faster startup times, smoother pane resizing on macOS, and better handling of large DOM trees (30K+ nodes). The elements panel gains CSS custom property tooltips, CSSNestedDeclarations support, and persistent element selection across reloads. The outline panel now updates live as pages change and better supports web components. New debug tools include a focus styles toggle and an improved Placeholdifier. New device presets for iPhone 16 and Pixel 8/9 are also included.
