Viewport Simulator
Main View
Detail View
Analytics
Technical Specs
Platform WebExtension for Mozilla Firefox
Distribution Published & approved on Firefox Add-ons
Compatibility Android (Chrome/Firefox) & iOS (Safari)
Simulation Interactive Iframe + Dynamic User-Agent Injection
Impact & Solution
Frontend workflow optimization via high-fidelity viewport testing. Unlike traditional tools, it enables developers to evaluate platform-specific behaviors and layouts by pairing operating systems with target browsers right in the active tab, saving costs and physical hardware dependencies.