"Overlay web composition easily with Firefox add-on for web developers." (10 words)
One of the standout features of Pixel Perfect is its cross-platform compatibility. Regardless of whether you use Mac OS X, Windows or Linux, you can enjoy the benefits of this nifty addon. Its versatility is a great plus point for developers who commonly switch between different operating systems.
Overall, if you want to ensure that your website looks exactly how you envisioned it - with no compromise in pixel-perfect accuracy - then the Pixel Perfect addon is definitely worth trying.
Version 1.1.0: N/A