Polypane is a specialized browser designed for web developers, emphasizing functionality like device emulation and responsive design testing. Users express a strong appreciation for its ability to emulate subtle device issues that common tools like Chrome’s device view do not replicate well. The product is based on the Chromium engine, which raises questions about its limitations for Safari or Firefox-specific issues. Users are curious about standout features compared to competitors like Browserstack, and some see value in subscription pricing, arguing that paid products reduce ad-driven data collection. Overall, the browser is viewed as a valuable tool for improving developer productivity, despite varying opinions on its pricing model.